asc z223 nfpa 54...asc z223 nfpa 54 committee on national fuel gas code draft 12-18-18 minutes...

ASC Z223 NFPA 54 COMMITTEE ON NATIONAL FUEL GAS CODE

DRAFT MINUTES November 6-7, 2018

APPROVAL PENDING


Draft 12-18-18

Minutes National Fuel Gas Code Committee

Hilton Providence Providence, RI

November 6-7, 2018 1. Call to Order and Self Introductions: Chair, Frank Mortimer, call the meeting to order and

members and guests introduced themselves (see Meeting Attendance Attachment A).

2. Adoption of Agenda: The agenda was approved as revised in the 11/2//18 emailed supplemental agenda package.

3. Announcements:

a. Fire alarms and Exits: Participants were made aware of the fire alarms and exists.

b. AGA and NFPA Antitrust Guidelines: Participants were made aware of the antitrust guidelines.

4. Membership Review: a. ASC Z223 Committee Updates – The membership roster and interest category balance were

reviewed. The committee is in balance in accordance with its operating procedures. b. NFPA 54 Committee Updates – The membership roster was reviewed. The NFPA

Standards Council is responsible for maintaining committee balance and was noted that it is in balance.

5. Approval of Committee Meeting Minutes: The June 2016 full committee and the September 2018 advisory panel meetings minutes were approved as distributed.

6. Future Meeting Schedule: The proposed 2019-2020 meeting schedule was reviewed (Attachment B). Several conflicts were noted with the tentatively scheduled Second Draft meeting on June 25-26. Secretary was requested to pursue other dates.

8. The NFPA staff liaison provided a presentation on the review process and the allowed motion options.

7. Consideration of Public Comment: The committee reviewed and acted on the public input and the panel recommendations. The committee actions that result in a first revision or committee input will be the standing action on the letter ballot. Approved actions from the letter ballot will be incorporated into the First Draft Report that will be placed out for public comment in 2019. Refer to the following attachments for the committee actions:

• Attachment C – Summary of Actions on Public Input • Attachment D – Preliminary First Revisions Report • Attachment E – Committee Inputs • Attachment F – Report on Public Input


Draft 12-18-18

6. Other Discussions: The committee discussed the following issue:

• Ted Lemoff provided an update on the NFPA 780 committee action that adds new Annex A material to NFPA 780 addressing CSST bonding when a lightning protection system is installed. The guidance does not appear to conflict with the bonding requirements in the NFPA 54/ASC Z223.1. To help ensure future coordination on technical issues and to establish a willingness to reach out for NFPA 780 input, Mr. Lemoff moved, seconded by Mr. Crane, to send a letter to NFPA 780 requesting that they consider appointing a member to attend the NFPA 54/ASC Z223 meetings. The motion was approved, and the Secretary was requested to draft a letter for Chair consideration.

There was also a discussion on whether NFPA 54/ASC Z223 should appoint a representative to attend NFPA 780 meetings. There was some concern that an appointment would be of limited use since NFPA 780 is entirely focused on lightning issues whereas NFPA 54/ASC Z223 is not. It was also noted that individual NFPA 54/ASC Z223 members have attended NFPA 780 meetings and have submitted public input and comments that assist in coordinating CSST bonding coverage between the two standards.

7. New Business: No new business was raised.

8. Adjourn: The meeting was adjourned at 5:20 pm on November 7.

ATTACHMENT A

Committee Meeting Attendance1

First Draft Meeting Providence Hilton, Providence, RI

November 6-7, 2018

Members2

Name, Representing

Dmitry Antonov, Intertek Testing Services James Brewer, National Chimney Sweep Guild Paul Cabot, Secretary, American Gas Association Shannon Corcoran, CSA Group Thomas Crane, Crane Engineering Gerald Davis, Williams Meter Company John Doucette, State of CT Depart. of Admin. Ralph Euchner, American Gas Assocation Mark Fasel, Viega LLC Richard Gilbert, Texas Propane Gas Assoc. Enrique Gonzalez, IAPMO Mike Gorham, National Propane Gas Assoc. Gregg Gress, International Code Council Roger Griffith, Griffith Engineering Steen Hagensen, ENERVEX Travis Hardin, UL LLC William Hamilton, American Gas Association

Peter Holmes, Maine Fuel Board Jeff Kleiss, AHRI Theodore Lemoff, Consultant Laura Moreno, Liaison, NFPA Frank Mortimer, Chair, Property Casualty Insurers Andrea Papageorge, American Gas Association Dale Powell, Copper Development Assoc. John Puskar, Prescient Technical Services LLC Phillip Ribbs, CA State Pipe Trades Council April Richardson, Railroad Commission of TX Eric Smith, International Fire Marshals Assoc. Jason Stanek, American Gas Association Phillip Stephens, AHRI Bruce Swiecicki, National Propane Gas Assoc. Franklin Switzer, S-afe Inc. Rover Torbin, AHRI Kody Daniel, Property Casualty Insurers Assoc.

Guests

Name, Organization

Gaetano Altomare, IPEX, Inc. Thomas Andrews, MI Technical Ed. Ctr. Joel Dzekciurius, Centrotherm Eco Sys. Jonathan Sargeant, Omegaflex James Ranfone, American Gas Association Andy Theilen, Crane Engineering

Jay White, Duravent Jon Eggly, Valencia Pipe Co. Alex Ing, NFPA James Molly, Centrotherm Eco Sys. Mark Harris, Titeflex Corporation

1. Attended all or part of the meeting, detailed attendance record can be obtained from the Secretary. 2. List includes principle, alternates, and non-voting members

DATE: October 5, 2018

SUBJECT: 2018-2020 Meetings: ASC Z223/NFPA 54 Committee

The ASC Z223 and NFPA 54 committees meet jointly to maintain and develop the National Fuel Gas Code. For your planning purposes the National Fuel Gas Code Committee’s 2018-2020 preliminary meeting schedule is proposed as follows:

2021 EDITION: PUBLIC INPUT DUE BY JUNE 27, 2018

Date: ...................September 18-21, 2018 Meeting Type: ....Advisory Panel Meetings Purpose:..............Review and make recommendations on Public Input Location .............Chicago, IL Host: ...................American Gas Association

Date: ...................November 6-7, 2015 Meeting Type: ....Full Committee Purpose:..............Act on Public Input and Panel Recommendations Location .............Providence, RI Host: ...................National Fire Protection Association

2021 EDITION: PUBLIC COMMENTS DUE BY MAY 8, 2019

Date: ...................June 18-19, 2019 Meeting Type: ....Full Committee Purpose:..............Act on Public Comments Location .............To Be Determined Host: ...................American Gas Association

2021 EDITION: PUBLISHED OCTOBER 2020

OPTIONAL OFF CYCLE MEETING Date: ...................November 17-18, 2020 Meeting Type: ....Full Committee Purpose:..............Complete Unfinished Business &Planning on 2024 Edition Location .............To Be Determined Host: ...................National Fire Protection Association

Timely meeting notices will be sent to you as each meeting date approaches. Meeting information will also be available on the AGA and NFPA websites. Please contact Paul Cabot with any questions or comments you may have at 202.824.7312 or [email protected].

ATTACHMENT B - Future Meeting Schedule

Dates to be revised

pcabot

Line

Attachment C– Summary of Actions on Public Input November 6-7, 2018

2021 National Fuel Gas Code

† FR (First Draft Revision), R (Resolved - no change to section), CI (Committee Input) Revised 12-13-18

PI No.

FR or CI No. Section – Topic; Proposed Action

Comm. Action†

- 126 Global Input – Revise phrase “in no case” FR 3, 74, 24,

75, 78 137 Global Input - 5.8.5, 5.8.5.1, 5.8.5.1, 5.15 (new) & 9.1.19, Revise to consolidate all venting for regulators. FR

157 38 Global Input – UL Standards; Delete “ANSI” from UL standards FR 123 59 Global Input – Engineering methods; Consistent use of term FR 34 60 Global Input – Use of the word mounted and mounting; Revise to use the term “installed” FR 88 - 1.1.1.1(A) – Point of delivery; Delete in favor of a new definition R 55 - 1.2 – Code Purpose; Add purpose statement R - 79 1.4 – Equivalency; Add appliances and equipment FR

133, 159 52 2.3.3 – Referenced Standards; Add newly required standards and update existing FR 4 61 3.3.3 – Air conditioning definition; Delete FR 89 62 3.3.5 – Appliance definition; Update to include CNG appliances. FR 5 63 3.3.5.1 – Automatically Controlled Appliances definition; Delete FR

6, 7 64 3.3.5.5.1 – Baking and Roasting Gas Oven definition; 3.3.72 – Oven; Gas Baking and Roasting definition; Delete the term “gas” FR

8, 9 65 3.3.5.5.4 – Gas Range definition; 3.3.82 – Range definition; Delete FR 10, 11 66 3.3.5.5.5 – Gas Steam Cooker definition; 3.3.92 – Steam Cooker definition; Delete the term “gas” FR 13, 14 67 3.3.5.5.6 – Gas Steam Generator definition; 3.3.93 – Steam Generator definition; Delete the term “gas” FR

- 124 3.3.5.8 & 3.3.5.9 – Nonresidential, Low-Heat Appliance & Nonresidential, Medium-Heat Appliance; delete the term “nonresidential” FR

76 - New Section after 3.3.6 – New definitions for regulator vents and discharge stacks and flue gas vent. R

- 145 3.3.10 – Baffle; The terms baffle and damper are used in the code and they appear to be interchangeable. Input is requested on proper terminology. CI

- 49 3.3.23 – Condensate; Editorial FR - 125 3.3.26 – Cubic Foot of Gas – Correct error in NFPA 54 version FR

121 135 3.3.35 – Engineering Methods definition; New definition FR 134 - 3.3.49 – Biogas; Modify definition of gases to include biogas sources R 135 148 3.3.56 – Nonrecirculating and Recirculating definitions; Revise to current standard titles. FR 90 134 3.3.78 – Point of Delivery definition; New definition FR 81 20 3.3.78.5 – Supply Pressure - New definition FR

180 69 3.3.81 – Qualified Agency definition; Revise to include design. FR 96 136 3.3.88 – Service Meter Assembly; Revise to include all components FR 15 73 3.3.95.7.1 – Forced Mechanical Draft Venting System definition; Delete FR 16 16 3.3.97 – Thread Joint Compounds definition; Delete FR 18 2 3.3.99 – Valve definition; Delete definition text FR 94 3 3.3.99 – Appliance Shutoff Valve definition; Revise FR 93 7 3.3.99.7 - System Shutoff Valve definition; New FR 95 4 3.3.99.6 – Service Shutoff Valve definition; Revise FR

131 - New Section after 4.1 – Personnel training; New requirement to require training and documentation of such training R

183 75 4.1 – Qualified Agency; Revise to include design and installation and editorial changes FR 21 76 4.3.2.1, A.4.3.2.1 – Drip liquids; Delete gas supplier notification and add new Annex A guidance FR

122 58 4.5, A.4.5(3) – Engineering Methods – New section on what constitutes an acceptable engineering method and new Annex A guidance FR

19 9 5.2 – Location of the Point of Delivery; Delete FR 97 - 5.3.1 – Interconnections; Revise to broaden the requirement R




PI No.


Comm. Action†

22 10 5.4.3 – Sizing Methods; Delete the unneeded term “other” FR 98 11 5.4.4 – Allowable pressure drop; Revise to delete unneeded terms and editorial changes FR 67 12 5.5.4 – Piping systems operating over 5 psig; Revise to allow LC4 fittings FR 20 13 5.6 – Acceptable Piping Materials; Delete the term “Acceptable” FR - 14 5.6.1.3 – Other Materials, Delete FR

17 15 5.6.6.4 – Thread Joint Compounds; Revise to include definition. FR - 30 5.8 – Plastic Piping Joints and Fittings - Add polyethylene standard FR

198 - 5.8.2 – Gas appliance pressure regulators; Add gas appliance pressure regulators and require listing. R 25 19 5.8.6 – Bypass Piping; Delete FR 79 - 5.9.1 – Overpressure protection; Reconfigure text and address gas trains R 80 - 5.9.2.2 – Overpressure protection; address gas train protection R 73 - 5.9.8 – Vents for overpressure protection; Various revisions to clarify the section’s intent R - 163 5.9.8 – Vents for overpressure protection; Revised coverage. Input requested on proposed requirements. CI

114 22 5.12 – Shutoff valves; Add a table of acceptable standards FR 137 23 5.13 – Excess flow valves; Revision to use consistent text “in accordance with” throughout the code FR 70 - 6.2.1 – CSST Tables; Revise to add a nominal pipe size row R 71 - 6.3.1 – CSST Tables; Revise to add a nominal pipe size row R 26 - 7.1.1 – Underground pipe clearances; Revise to separate metallic and plastic pipe clearance requirements R

99 24 7.1.2.1(B), A.7.1.2 (B) – Ground cover; Apply to all pipe and tubing, new Annex A guidance on the conduit usage intent FR

105 25 7.1.3.2 – LP dielectric fitting; Require dielectric fitting FR 112 26 7.1.5 – Piping through foundation wall; Require compatible sealants FR 111 27 7.2.1 – Piping elevation above grade or roof; Require a minimum 3 ½ inches FR 113 28 7.2.1 – Piping through above ground walls; Require compatible sealants FR 106 29 7.2.2, A.7.2.2 – Protective coatings; New Annex A guidance that painting is acceptable FR

- 138 7.2.6.4 – Piping on roofs, delete elevation requirement. See FR 27 FR 92 5 7.8.1.1 – Accessibility of gas valves; Coordination with other FR on shutoff valves FR 91 8 7.8.4 (new), A.7.8.4 – System shutoff valves; New coverage for these valves FR

100 - 7.12.1 – Likely to become energized; Require all piping be electrically bonded R 186 - 7.12.2 – CSST; minimum DC resistance R 179 - 7.12.2.3 – CSST; reduce bond length to 25ft R 200 - 7.12.2.3 – CSST; Reduce bond length to 25ft R 187 - 7.12.2.4 – CSST; add a bonding conductor bending radii R 184 - New Section after 7.12.2.5 – CSST; minimum distance to other metallic parts and electrical conductors R 182 - 7.12.3 – CSST; delete arc-resistant jacketed bonding section R

- 139 Table 7.2.6.2 Support of Piping, replace table with revised table; Input requested on stainless steel support and clarification on types of copper. CI

86 - 8.1.5 – Detection of leaks; Set a minimum leakage rate R 83 - 8.1.5.1 – New Annex A material on leakage; Add commonly used terms R

- 161 Table 8.3.1 Size and Length of Piping for purging; Determine equivalent volume based on the table values to allow smaller sections of piping above 2 psi or larger sizes to apply to other applications. CI

23 77 9.1.1.1 – Approved; Delete FR 85 - 9.1.1.3 – Acceptable of unlisted appliances; Require acceptance based on other NFPA standards R

140 - 9.1.1.4 – Unlisted appliances; equipment and accessory; Delete R

101 107 9.1.3 – Types of gases; Require listed appliances to be converted only where permitted by manufacturer’s instructions FR




PI No.


Comm. Action†

102 108 9.1.16 – Adequate capacity of piping; Delete FR 138 140 9.1.18 – Appliance pressure regulators; add specific standard and require their listing FR

27 109 9.1.22, A.9.1.22 – Installation instructions; Revise to require the installer leave the instructions on the premises and revise Annex A guidance to state the instruction’s purpose FR

126 - 9.1.24 – Inspection of existing appliance installation, Delete R 103 110 9.4.2.3 – Electrical outlet; Delete coverage and reference NFPA 70 FR 139 105 9.6.1 – Manufactured homes connectors; Consistent use of the terms FR 107 112 9.6.1 – CSST connections; Add restriction on metallic housing penetration FR 35 114 9.6.1.3 – Food service connectors; Consistent use of defined terms FR

141 115 9.6.2 – Outdoor gas hose; Add complete standard designation FR 142 116 9.6.6.1 – Quick-disconnect devices; Consistent use of terms FR 143 117 10.1.1 – Unlisted appliances; Revise to apply to both listed and unlisted appliances FR

- 162 10.1.1.1 New coverage for combination appliances and a possible new definition; Input requested on whether such an appliance should be considered listed when it is listed to either applicable standard relating to the function of the appliance.

CI

144 86 New Section after 10.2 - Air conditioning; add specific AC and HP standards and require they be listed FR 28, 29 118 10.2 – Air-conditioning appliances; 10.2.2 – Gas engine connections; Format and consistency fixes FR

146 87 10.2.3 – Air conditioning listing; Require listing FR 30 141 10.2.4 – AC assembly; Delete duplicative statement FR - 164 10.2.4 – Assembly and Installation; Delete the stated examples FR

31 119 10.2.5 – Furnace plenums; Delete duplicative statement. Modify based on PI 31. FR 104 111 10.2.7 – Electrical switches, Delete coverage and reference NFPA 70 FR 145 82 10.3.1 – Furnace and boiler listing, Add specific furnace and boiler standards and require their listing FR 147 142 10.3.2.3 – Central heating; Revised to apply to both listed and unlisted FR 148 - 10.3.2.8 – Unlisted central heating furnaces; Delete R 149 - 10.3.2.9 – Central heating furnaces; Consistency with other submitted PI on requiring listing R 108 143 10.3.7.4 – Return air location; Add prohibition on mechanical rooms containing furnaces FR 150 81 10.4 – Clothes dryers; Add clothes dryer standards and require their listing FR 32 146 10.4.6 – Clothes dryers in multiple family locations; Delete approve safety devices FR

151 80 10.6 – Decorative appliances; Delete unlisted requirements FR 152, 156 78 10.7 – Gas fireplaces; Add appliance standard and require listing, delete unlisted coverage FR 124, 125, 160, 162 147 10.8 – Industrial air heaters; Consolidate similar non and recirculating coverage FR

163 88 10.10 – Duct furnaces; Add appliance standards and require listing, delete unlisted coverage FR 33 89 10.10.6.3 – Duct furnace located upstream of cooling unit; Delete FR

- 127 10.10.6.4, A.10.10.6.4 – Duct furnace downstream of an evaporative cooler; Relocate the second sentence to a new Annex A section FR

164 90 10.11 – Floor furnaces; Add appliance standard and require listing, delete unlisted coverage FR

165 91 10.12 – Floor mounted food service appliances; Add appliance standard and require listing, delete unlisted coverage FR

166 92 10.13 – Counter food service appliances; Add appliance standard and require listing, delete unlisted coverage FR 37 149 10.13.2 – Counter food service clearances; Delete explanatory text FR

167 93 10.14 – Household cooking appliances; Add appliance standard and require listing, delete unlisted coverage FR 109 150 10.14.2 – Household cooking appliances with room heaters; Delete FR 38 120 10.14.3 – Level installation of cooking appliances; Delete FR

168 - 10.15 – Illuminating appliances; Add appliance standard and require listing, delete unlisted coverage R




PI No.


Comm. Action†

39 151 10.15.2.2 – Open flame lights; Consistent use of defined terms FR 169 152 10.17 – Infrared heaters; Add appliance standard and require listing FR 40 153 10.17.4 – Heaters in commercial garages; Editorial FR

170 96 10.18 – Open-Top Broilers; Add appliance standard and require listing, delete unlisted coverage FR

41, 171 97 10.19 – Outdoor cooking appliances; Add appliance standard and require listing, delete unlisted coverage, eliminate restriction on installation under combustible construction FR

42, 172 98 10.20 – Pool heaters; Add appliance standard and require listing, delete unlisted coverage FR 173 99 10.21 – Refrigerators; Add appliance standard and require listing FR 176 154 10.22.5 – Wall type room heaters; Add appliance standard and require listing, delete unlisted coverage FR 178 100 10.25 – Unit heaters; Add appliance standard and require listing, delete unlisted coverage FR 188 101 10.26 – Wall furnaces; Add appliance standard and require listing, delete unlisted coverage FR 43 121 10.26.1.4 – Direct vent wall furnaces; Delete duplicative text FR

189 102 10.27 – Water heaters; Add appliance standard and require listing, delete unlisted coverage FR

- 128 10.27.1.1 Water heaters in Locations with Air-Handlers; Relocate to 10.1.3 to make applicable to all draft hood appliances FR

87 122 10.28 – Non-residential CNG appliances; Add coverage for these appliances FR 197 103 10.30 – Fuel cell power plants; Add appliance standard and require listing FR 195 155 10.32 – Outdoor infrared patio heaters; Add new coverage, add appliance standard and require their listing FR

44, 194 104 10.31 – Outdoor decorative appliances; Add appliance standard and require listing, delete unlisted coverage, editorial FR

45 123 11.3 – Safety shutoff devices; Eliminate the word “properly” and editorial changes FR 77 - Chapter 12 – Title; Revise title R 50 39 12.2.1 – Listed vents; Add “chimneys” to general statement FR

46, 118 33 12.3.5 – Direct vent installation; 12.3.5 & 12.3.6 – Direct vent appliances; Allow other than through the wall terminations for direst vent FR

190 - 12.3.5 – Direct vent installation; Revise to require manufacturer’s installation instructions R 69 - 12.3.5 – Direct vent installation; Require distance above from snow level R 47 160 12.3.6 – Appliances with intergyral vents; Eliminate duplicative text FR - 129 12.3.7 – Incinerators; Delete “Commercial-industrial-type” FR

48 - 12.4.1 – Appliance draft requirements; Delete R 154 - 12.4.3.1 – Common venting of Cat. II, III, & IV; Add allowance R 119 157 12.4.3.6 – Side wall vent terminations; Delete FR 36 40 12.4.4.1 – Vent dampers; Consistent use of defined terms FR

127 - 12.5.1 – Allowed vents; Revise Cat. II, III, IV vent type text R 193 - 12.5.1 – Allowed vents; Revise Cat. II, III, IV vent type text R 128 - 12.5.2 – Plastic vent piping; Revise to require UL 1738 plastic vents R 191 - 12.5.2– Plastic vent piping; Revise to require UL 1738 plastic vents R 192 - 12.5.3 – Plastic vent piping; Revise to require vents be provided by the manufacturer. R 153 - New Section after 12.5.4 – Common venting of positive vent pressure appliances; New R 49 41 12.6.1.1 – Factory-built chimneys; Delete duplicative requirement FR 51 42 12.6.3.1 – Effective area of chimney; Editorial FR - 50 12.6.4.2 – Unlined chimney continued use; Delete FR

52 43 12.6.9 – Insulation shield; Delete duplicative requirement FR 53 - 12.7.4.1 – Category I sizing; Editorial R 54 34 12.7.5.1 – Multistory vents; Editorial FR 56 - 12.7.7 – Marking; Revised to eliminate the locality-based requirement R




PI No.


Comm. Action†

57 - 12.8.4.6 – Single-wall pipe; Editorial R 58 - 12.8.4.6 – Single-wall pipe thimble size; Reorganize requirements into a table R

115 156 Sections 12.9.1; 12.9.2; 12.9.3; 12.9.4 – Side wall vent clearances; Reorganize current and expand requirements into a table and figure FR

68 - 12.9.3 – Snow clearances for side wall vent terminations; Ad minimum 12 inches R 117 158 12.10 – Condensation drain; Changes linked to changes in 12.9 FR 59 44 12.11.2.5 – Factory built chimneys; Editorial FR 60 45 12.11.3.2 – More than one draft hood; Editorial FR

120 35 12.11.7 – Tee and wye fittings; New section to require manufactured fittings FR - 51 12.11.10 – Chimney Connection; Format change FR

61 36 12.13.2.2 – Special design draft hood; Delete FR

199 144 12.14.1, 12.14.2(new), A.12.14.2 (new), 12.14.3 – Manually operated dampers; New balancing baffle coverage FR

62 46 12.15 – Automatic vent dampers; Editorial FR 63 - 13.1.6 – Two-sage modulating appliances; Editorial R 64 47 13.1.17 – Sizing vents; Editorial FR 65 - Sections 13.2.13; 13.2.14 – Vent height; Editorial R 66 48 13.2.19 – Two-stage modulating appliances; Editorial FR

196 - New Section after A.3.3.5.11.1 – Biogas; add guidance R 132 - New Section after A.3.3.64.1 – Guidance on qualified agency training; New coverage R

- 31 Table A.5.6 – Add polyethylene. Input requested on plastic materials joining and fittings and proper table formatting. CI

201 - A.7.12.5 – CSST; guidance on the need for addition bonding points R 116 159 A.12.9 – Exit terminal figure; Delete FR

- 32 B.7.3 Example 3(4)(c), B.7.3 Example 3(5)(c) – Correct metric conversion and chapter reference FR - 130 D.1 – Notify; Add 911 FR - 54 F.2.2 Example 4 5(a) – Correct section reference FR - 55 F.2.4 Example 5(c) – Correct section reference FR - 57 G.4.2 – Correct chapter references FR

110 113 G.4.4.4 – Flooded appliance replacement; Delete guidance allowing controls and components to be replaced FR - 56 G.5.2 (14) – Inspection of appliances; Correct chapter references FR 2 - G.5.2 – Draft inspection time; Delete 15minute wait period R - 132 H.3(a), H.3(b) – Correct section reference and example text FR - 131 I.1(2) – Correct example text FR

161 53 Annex K– Standards List; Update standards to current editions FR

WORKING DRAFT OF NFPA 54 TECHNICAL COMMITTEE MEETING OUTPUT

CONTENT NOT FINAL –SUBJECT TO REVISION PRIOR TO LETTER BALLOT AND PUBLICATION OF

FIRST DRAFT REPORT

Document: National Fuel Gas Code

Revision Cycle: A2020

Meeting Dates: November 6 – 7, 2018

Committee Activity: Input Stage

This is a working draft, prepared by NFPA staff, to record the output generated at the Technical Committee’s First Draft Meeting. It includes draft copies of the First Revisions and any Global Revisions.

It is being made available to Committee members for the purpose of facilitating early review, particularly for those Committee members who may be seeking input from their respective organizations in preparation for the Letter Ballot of the Committee.

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ATTACHMENT D - Preliminary First Revisions Report Part of the Minutes from the November 6 - 7, 2018, Meeting

1

First Revision No. 126-NFPA 54-2018 [ Global Input ]

Remove "in no case" from the document by making the edits in the attached Word file.

Supplemental Information

File Name Description Approved

54_FR_126_global.docx

Submitter Information Verification

Committee: NFG-AAA

Submittal Date: Fri Sep 21 12:43:44 EDT 2018

Committee Statement

Committee Statement: Archaic language is being removed from the code.

Response Message: FR-126-NFPA 54-2018

National Fire Protection Association Report https://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPar...

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Table 10.2.3 Reduction of Clearances with Specified Forms of Protection

Notes:

(9) At least 1 in. (25 mm) shall be between the appliance and the protector. In no case shall tThe

clearance between the appliance and the combustible surface shall not be reduced below that allowed

in Table 10.2.3.

10.10 Duct Furnaces. 10.10.1 Clearances. The installation of duct furnaces shall comply with the following clearance requirements:

1. Listed duct furnaces shall be installed with clearances of at least 6 in. (150 mm) betweenadjacent walls, ceilings, and floors of combustible material and the furnace draft hoodand shall comply with the following:

a. Furnaces listed for installation at lesser clearances shall be installed in accordancewith the manufacturer's installation instructions.

b. In no case shall tThe clearance be such as toshall not interfere with combustion airand accessibility.

10.20.2 Clearance. The installation of pool heaters shall meet the following requirements:

1. In no case shall tThe clearances be such as toshall not interfere with combustion air, drafthood or vent terminal clearance and relief, and accessibility for servicing.

10.22.4 Clearance. A room heater shall be placed so as not to cause a hazard to walls, floors, curtains, furniture, doors when open, and so on, and to the free movements of persons within the room. Heaters designed and marked “For use in noncombustible fireplace only” shall not be installed elsewhere. Listed room heaters shall be installed in accordance with the manufacturer's installation instructions. In no case shall tThe clearances be such as toshall not interfere with combustion air and accessibility. Unlisted room heaters shall be installed with clearances from combustible material not less than the following:

Table 12.9.3 Through‐the‐Wall Direct Vent Termination Clearances

> 150,000 Btu/hr (29.4kW)

In accordance with the appliance manufacturer’s instructions and in no casenot less than the clearances specified in 12.9.2

Commented [ML1]: This is becoming 10.20.3 with FR 98

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Revise the title to 5.8.5 and add new language. Delete 5.8.5.1, 5.8.5.2, and 9.1.19. Add new section 5.15.See word file attached for language.



54_FR137_Global.docx Changes to 5.8.5, 5.15, and 9.1.19.


Committee: NFG-AAA

Submittal Date: Tue Nov 06 12:03:09 EST 2018

Committee Statement

CommitteeStatement:

The code had addressed venting of pressure control devices in several sections. These sectionswere not coordinated and did not address the required issues consistently or completely. Thedistance discharge requirements for higher pressure discharges (2 psi and above) was also notconsistent with requirements for purging in Section 8.3.

ResponseMessage:

FR-137-NFPA 54-2018

Public Input No. 3-NFPA 54-2018 [Section No. 5.8.5]



Public Input No. 24-NFPA 54-2018 [Section No. 5.8.5.2]

Public Input No. 78-NFPA 54-2018 [New Section after 5.9.8]


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5.8.5 VentingRegulator Vents. Regulator vents shall be in accordance with 5.15. 5.8.5.1 Line Pressure Regulators.

Line pressure regulators shall comply with all of the following:

(1) An independent vent to the exterior of the building, sized in accordance with the regulator manufacturer’s instructions, shall be provided where the location of a regulator is such that a ruptured diaphragm will cause a hazard.

(a) Where more than one regulator is at a location, each regulator shall have a separate vent to the outdoors or, if approved by the authority having jurisdiction, the vent lines shall be permitted to be manifolded in accordance with accepted engineering practices to minimize back pressure in the event of diaphragm failure.

(b) Materials for vent piping shall be in accordance with Section 5.6.

Exception: A regulator and vent limiting means combination listed as complying with ANSI Z21.80/CSA 6.22, Line Pressure Regulators, shall be permitted to be used without a vent to the outdoors.

(2) The vent shall be designed to prevent the entry of water, insects, or other foreign materials that could cause blockage.

(3) The regulator vent shall terminate at least 3 ft (0.9 m) from a source of ignition.

(4) At locations where regulators might be submerged during floods, a special antiflood-type breather vent fitting shall be installed, or the vent line shall be extended above the height of the expected flood waters.

(5) A regulator shall not be vented to the appliance flue or exhaust system.

5.8.5.2 Gas Appliance Pressure Regulators.

For venting of gas appliance pressure regulators, see 9.1.19.

5.15 Pressure Regulator and Pressure Control Venting. The venting of the atmospheric side of diaphragms in line pressure regulators, gas appliance regulators and gas pressure limit controls shall be in accordance with all of the following:

(1) An independent vent pipe to the outdoors, sized in accordance with the device manufacturer’s instructions, shall be provided where the location of a device is such that a discharge of fuel gas will cause a hazard. For devices other than appliance regulators, vents are not required to be independent where the vents are connected to a common manifold designed in accordance with accepted engineering practice to minimize backpressure in the event of diaphragm failure and such design is approved.

Exception No. 1: A regulator and vent limiting means combination listed as complying with ANSI Z21.80/CSA 6.22, Line Pressure Regulators, shall not be required to be vented to the outdoors.

Exception No. 2: A listed gas appliance regulator factory equipped with a vent limiting device is not required to be vented to the outdoors.

(2) Materials for vent piping shall be in accordance with Section 5.6.

(3) The vent terminus shall be designed to prevent the entry of water, insects, and other foreign matter that could cause blockage. DRAFT - S

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(4) Vent piping shall be configured and installed to prevent a static load or bending moment from being placed on the body of regulators and gas pressure control devices.

(5) Vents shall terminate not less than 3 ft (0.9 m) from a possible source of ignitionand mechanical and gravity air intake openings including windows and doors. Where the inlet pressure to the regulator or pressure control is greater than 2 psi, the minimum distance shall be 10 feet (3 m).

(6) At locations where a vent termination could be submerged during floods or snow accumulations, an antiflood-type breather vent fitting shall be installed, or the vent terminal shall be located above the height of the expected flood waters or snow.

(7) Vent piping from pressure regulators and gas pressure controls shall not be a connected to a common manifold that serves a bleed line from a diaphragm-type gas valve.

9.1.19 Venting of Gas Appliance Pressure Regulators.

Venting of gas appliance pressure regulators shall comply with the following requirements:

(1) Appliance pressure regulators requiring access to the atmosphere for successful operation shall be equipped with vent piping leading outdoors or, if the regulator vent is an integral part of the appliance, into the combustion chamber adjacent to a continuous pilot, unless constructed or equipped with a vent limiting means to limit the escape of gas from the vent opening in the event of diaphragm failure.

(2) Vent limiting means shall be employed on listed appliance pressure regulators only.

(3) In the case of vents leading outdoors, means shall be employed to prevent water from entering this piping and also to prevent blockage of vents by insects and foreign matter.

(4) Under no circumstances shall a regulator be vented to the appliance flue or exhaust system.

(5) In the case of vents entering the combustion chamber, the vent shall be located so the escaping gas is readily ignited by the pilot and the heat liberated thereby does not adversely affect the normal operation of the safety shutoff system. The terminus of the vent shall be securely held in a fixed position relative to the pilot. For manufactured gas, the need for a flame arrester in the vent piping shall be determined.

(6) A vent line(s) from an appliance pressure regulator and a bleed line(s) from a diaphragm-type valve shall not be connected to a common manifold terminating in a combustion chamber. Vent lines shall not terminate in positive-pressure-type combustion chambers.

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Remove ANSI from in front of all UL standards referenced in NFPA 54


Committee: NFG-AAA

Submittal Date: Wed Sep 19 18:00:23 EDT 2018

Committee Statement

CommitteeStatement:

Many years ago, UL preferred the ANSI/UL reference because there was a transition of traditionalUL standards towards an ANSI standards development process.

Now, years later, a large majority of UL Standards are ANSI approved and follow the ANSIdevelopment and maintenance process. However, sometimes readers are confused because theydon’t understand the standards are actually UL standards, not developed by ANSI. There are manyother references to standards promulgated by other standards development organizations wherethey are considered ANSI approved but do not include ANSI in the reference.

ResponseMessage:

FR-38-NFPA 54-2018

Public Input No. 157-NFPA 54-2018 [Global Input]


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Revise the following sections:

5.8.5.1 (1) (a) Where more than one regulator is at a location, each regulator shall have a separate vent tothe outdoors or, if approved by the authority having jurisdiction, the vent lines shall be permitted to bemanifolded in accordance with accepted approved engineering practices methods to minimize backpressure in the event of diaphragm failure.

7.11.5.1* Location. The gas-mixing machine shall be located in a well-ventilated area or in a detachedbuilding or cutoff room provided with room construction and explosion vents in accordance with soundapproved engineering methods principles . Such rooms or belowgrade installations shall have adequatepositive ventilation.

9.1.1.3 Acceptance of unlisted appliances, equipment, and accessories shall be on the basis of an analysisusing approved engineering evaluation methods.

9.3.5 Engineered Installations. Engineered combustion air installations shall provide an adequate supplyof combustion, ventilation, and dilution air determined using approved engineering methods and shall beapproved by the authority having jurisdiction.

12.7.4.1 (5)

(5) Other approved engineering practices methods

12.8.5(c)(c) Other approved engineering methods.

12.11.3.1 A vent connector for an appliance with a single draft hood or for a Category I fan-assistedcombustion system appliance shall be sized and installed in accordance with Chapter 13 or other approvedengineering methods.

12.11.3.2 For a single appliance having more than one draft hood outlet or flue collar, the manifold shall beconstructed according to the instructions of the appliance manufacturer. Where there are no instructions,the manifold shall be designed and constructed in accordance with approved engineering practicesmethods. As an alternative method, the effective area of the manifold shall equal the combined area of theflue collars or draft hood outlets, and the vent connectors shall have a minimum 1 ft (0.3 m) rise.

12.11.3.3 Where two or more appliances are connected to a common vent or chimney, each vent connectorshall be sized in accordance with Chapter 13 or other approved engineering methods.

12.11.3.5 Where two or more appliances are vented through a common vent connector or vent manifold,the common vent connector or vent manifold shall be located at the highest level consistent with availableheadroom and clearance to combustible material and sized in accordance with Chapter 13 or otherapproved engineering methods.

12.16 Obstructions. Devices that retard the flow of vent gases shall not be installed in a vent connector,chimney, or vent. The following shall not be considered as obstructions:

(4) Vent dampers serving listed appliances installed in accordance with 13.1.1 or 13.2.1 or other approvedengineering methods

13.2.18 Vertical Vent Size Limitation. Where two or more appliances are connected to a vertical vent orchimney, the flow area of the largest section of vertical vent or chimney shall not exceed seven times thesmallest listed appliance categorized vent areas, flue collar area, or draft hood outlet area unless designedin accordance with approved engineering methods.


Committee: NFG-AAA

Submittal Date: Thu Sep 20 10:33:26 EDT 2018

Committee Statement

CommitteeStatement:

The term “approved engineering method” is revised to be used consistently throughout thecode.




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Revise the use of "mounted" and "mounting" in various sections, per the attached Word file.



54_FR_60_global.docx


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Installed is the proper term. "Mounted" and "mounting" were used historically and many of theuses of "mounted" and "mounting" have been changed in previous editions.

ResponseMessage:

FR-60-NFPA 54-2018



3.3.58 Hot Plate. See 3.3.5.5.2, Gas Counter Appliance. 3.3.58.1 Domestic Hot Plate. A fuel gas–burning appliance - consisting of one or more open-top-type burners installedmounted on short legs or a base.

Table 10.2.3 Reduction of Clearances with Specified Forms of Protection

Notes:

(6) Where a wall protector is installedmounted on a single flat wall away from corners,

it shall have a minimum 1 in. (25 mm) air gap. To provide adequate air circulation, the bottom and top edges, or only the side and top edges, or all edges shall be left open.

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In the figure, replace all cases of

“mounted” with “installed”.

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10.12.3 Mounting on Combustible Floor.

10.12.3.1 Listed floor-mounted food service appliances that are listed specifically for installation on floors constructed of combustible material shall be permitted to be installedmounted on combustible floors in accordance with the manufacturer’s installation instructions.

10.12.3.2 Floor-mounted food service appliances that are not listed for mounting installation on a combustible floor shall be mounted installed in accordance with 10.12.4 or be installedmounted in accordance with one of the following: (1) Where the appliance is set on legs that provide not less than 18 in. (460 mm) open space under the base of the appliance or where it has no burners and no portion of any oven or broiler within 18 in. (460 mm) of the floor, it shall be permitted to be installedmounted on a combustible floor without special floor protection, provided at least one sheet metal baffle is between the burner and the floor. (2) Where the appliance is set on legs that provide not less than 8 in. (200 mm) open space under the base of the appliance, it shall be permitted to be installedmounted on combustible floors, provided the floor under the appliance is protected with not less than 3∕8 in. (9.5 mm) insulating millboard covered with sheet metal not less than 0.0195 in. (0.5 mm) thick. The preceding specified floor protection shall extend not less than 6 in. (150 mm) beyond the appliance on all sides. (3) Where the appliance is set on legs that provide not less than 4 in. (100 mm) under the base of the appliance, it shall be permitted to be installedmounted on combustible floors, provided the floor under the appliance is protected with hollow masonry not less than 4 in. (100 mm) in thickness covered with sheet metal not less than 0.0195 in. (0.5 mm) thick. Such masonry courses shall be laid with ends unsealed and joints matched in such a way as to provide for free circulation of air through the masonry. (4) Where the appliance does not have legs at least 4 in. (100 mm) high, it shall be permitted to be installedmounted on combustible floors, provided the floor under the appliance is protected by two courses of 4 in. (100 mm) hollow clay tile, or equivalent, with courses laid at right angles and with ends unsealed and joints matched in such a

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way as to provide for free circulation of air through such masonry courses, and covered with steel plate not less than 3∕16 in. (4.8 mm) in thickness.

10.15.3 Mounting Installation on Buildings. Illuminating appliances designed for installation on a wall or ceiling mounting shall be securely attached to substantial structures in such a manner that they are not dependent on the gas piping for support.

10.15.4 Mounting Installation on Posts. Illuminating appliances designed for installation on a post mounting shall be securely and rigidly attached to a post. Posts shall be rigidly mounted installed. The strength and rigidity of posts greater than 3 ft (0.9 m) in height shall be at least equivalent to that of a 21∕2 in. (64 mm) diameter postconstructed of 0.064 in. (1.6 mm) thick steel or a 1 in. Schedule 40 steel pipe. Posts 3 ft (0.9 m) or less in height shall not be smaller than a 3∕4 in. Schedule 40 steel pipe. Drain openings shall be provided near the base of posts where water collecting inside the posts is possible.

10.22.5 Wall-Type Mounted Room Heaters. Wall-type mounted room heaters shall

not be installed in or attached to walls of combustible material unless listed

for such installation.

10.26.1.4 Direct vent wall furnaces shall be installed with the vent air intake terminal in the outdoors. The thickness of the walls on which the furnace is mounted installed shall be within the range of wall thickness marked on the furnace and covered in the manufacturers’ installation instructions.

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First Revision No. 79-NFPA 54-2018 [ Section No. 1.4 ]

1.4 Equivalency.

The provisions of this code are not intended to prevent the use of any material, appliance, equipment,method of construction, or installation procedure not specifically prescribed by this code, provided any suchalternative is acceptable to the authority having jurisdiction. The authority having jurisdiction shall requirethat sufficient evidence be submitted to substantiate any claims made regarding the safety of suchalternatives.


Committee: NFG-AAA


Committee Statement

Committee Statement: This revision corrects an omission to the code.



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First Revision No. 52-NFPA 54-2018 [ Chapter 2 ]

Chapter 2 Referenced Publications

2.1 General.

The documents or portions thereof listed in this chapter are referenced within this code and shall beconsidered part of the requirements of this document.

2.2 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages, 2018 edition.

NFPA 37, Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, 2018edition.

NFPA 51, Standard for the Design and Installation of Oxygen–Fuel Gas Systems for Welding, Cutting, andAllied Processes, 2018 edition.

NFPA 52, Vehicular Natural Gas Fuel Systems Code, 2016 edition.

NFPA 58, Liquefied Petroleum Gas Code, 2017 edition.

NFPA 70®, National Electrical Code®, 2017 edition.

NFPA 82, Standard on Incinerators and Waste and Linen Handling Systems and Equipment, 2014 edition.

NFPA 88A, Standard for Parking Structures,2015 2019 edition.

NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, 2018 edition.

NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning Systems, 2018 edition.

NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, 2017edition.

NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel–Burning Appliances, 2016 edition.

NFPA 409, Standard on Aircraft Hangars, 2016 edition.

NFPA 780, Standard for the Installation of Lightning Protection Systems, 2017 edition.

NFPA 853, Standard for the Installation of Stationary Fuel Cell Power Systems, 2015 edition.

NFPA 1192, Standard on Recreational Vehicles, 2018 edition.

2.3 Other Publications.


2.3.1 ASME Publications.

American Society of Mechanical Engineers, Two Park Avenue, New York, NY 10016-5990, (800) 843-2763,www.asme.org.

ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch, 2013.

ANSI/ASME B16.1, Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250, 2010 2015 .

ANSI/ASME B16.5, Pipe Flanges and Flanged Fittings: NPS 1⁄2 through NPS 24 Metric/Inch Standard,2013 2017 .

ANSI/ASME B16.20, Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound and Jacketed, 20122017 .

ANSI/ASME B16.21, Nonmetallic Flat Gaskets for Pipe Flanges, 2011 2016 .

ANSI/ASME B16.24, Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900,1500, and 2500, 2011 2016 .

ANSI/ASME B16.33, Manuually Operated Metallic Gas Valves for Use in Gas Piping Systems up to 175psi (Sizes NPS 1/2 through NPS 2) , 2012.

ANSI/ASME B16. 42, Ductile Iron Pipe Flanges and Flanged Fittings: Classes 150 and 300, 2011 2016 .

ANSI/ASME B16.44, Manually Operated Metallix Gas Valves for Use in Above Ground Piping Systems upto 5 psi, 2012.

ANSI/ASME B16. 47, Large Diameter Steel Flanges: NPS 26 through NPS 60 Metric/Inch Standard,2011 2017 .

ANSI/ASME B36.10M, Welded and Seamless Wrought Steel Pipe, 2015.

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2.3.2 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, (610)832-9585, www.astm.org.

ASTM A53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded andSeamless, 2012 2018 .

ASTM A106, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service, 20142018 .

ASTM A254, Standard Specification for Copper-Brazed Steel Tubing, 2012.

ASTM A268, Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless SteelTubing for General Service, 2010, reaffirmed 2016 .

ASTM A269, Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing forGeneral Service, 2015.

ASTM A312, Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic StainlessSteel Pipes, 2015 2017 .

ASTM B88, Standard Specification for Seamless Copper Water Tube, 2014 2016 .

ASTM B210, Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes, 2012.

ASTM B241, Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and SeamlessExtruded Tube, 2012.

ASTM B280, Standard Specification for Seamless Copper Tube for Air-Conditioning and Refrigeration FieldService, 2013 2018 .

ASTM D2513, Standard Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings,2014 2018 .

ASTM E136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C,2012 2016 .

ASTM E2652, Standard Test Method for Behavior of Materials in a Tube Furnace with a Cone-shapedAirflow Stabilizer, at 750°C, 2012 2016 .

ASTM F1973, Standard Specification for Factory Assembled Anodeless Risers and Transition Fittings inPolyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems,2013, reaffirmed 2018 .

ASTM F2509, Standard Specification for Field-Assembled Anodeless Riser Kits for Use on OutsideDiameter Controlled Polyethylene Gas Distribution Pipe and Tubing, 2012 2015 .

ASTM F2945, Standard Specification for Polyamide 11 Gas Pressure Pipe, Tubing, and Fittings, 2015.


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2.3.3 CSA Group Publications.

CSA Group, 178 Rexdale Boulevard, Toronto, ON M9W 1R3, Canada, (216) 524-4990, www.csagroup.org.

ANSI/CSA FC 1, Fuel Cell Technologies - Part 3-100: Stationary Fuel Cell Power Systems - Safety , 2014.

ANSI/CSA NGV 5.1, Residential Fueling Appliances, 2015 2016 .

ANSI/CSA NVG 5.2, Vehicle Fueling Appliances (VFA) , 2017.

ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST), 20142018 .

ANSI LC 4/CSA 6.32, Press-Connect Metallic Fittings for Use in Fuel Gas Distribution Systems, 2012.

ANSI Z21.1/CSA 1.1, Household Cooking Gas Appliances , 2016.

ANSI Z21.5.1/CSA 7.1, Gas Clothes Dryers, Volume I, Type 1 Clothes Dryers , 2017.

ANSI Z21.5.2/CSA 5.2, Gas Clothes Dryers, Volume II, Type 2 Clothes Dryers , 2017.

ANSI Z21. 8, Installation of Domestic Gas Conversion Burners, 1994, reaffirmed 2012 2017 .

ANSI Z21.10.1/CSA 4.1, Gas Water Heaters, Volume I, Storage Water Heaters with Input Ratings of75,000 Btu per Hour or Less , 2017.

ANSI Z21.10.3/CSA 4.3, Gas Water Heaters, Volume III, Storage Water Heaters with Input Ratings Above75,000 Btu per Hour, Circulating or Instantaneous , 2017.

ANSI Z21. 11.2, Gas-Fired Room Heaters — Volume II, Unvented Room Heaters, 2013 2016 .

ANSI Z21.13/CSA 4.9, Gas-fired Low Pressure Steam and Hot Water Boilers , 2017.

ANSI Z21.15/CSA 9.1, Manually operated gas valves for appliances, appliance connector valves and hoseend valves , 2009, reaffirmed 2014.

ANSI Z21.18/CSA 6.3, Gas Appliance Pressure Regulators , 2007, reaffirmed 2017.

ANSI Z21.19/CSA 1.4, Refrigerators Using Gas Fuel , 2014.

ANSI Z21.22/CSA 4.4, Relief Valves for Hot Water Supply Systems , 2015.

ANSI Z21. 24/CSA 6.10, Connectors for Gas Appliances, 2015.

ANSI Z21.40.1/CSA 2.91, Gas-fired Heat Activated Air Conditioning and Heat Pump Appliances , 1996.

ANSI Z21.40.2/CSA 2.92, Air Conditioing and Heat Pump Appliances (Internal Combustion) , 1996.

ANSI Z21. 41/CSA 6.9, Quick-Disconnect Devices for Use with Gas Fuel Appliances, 2014.

ANSI Z21.47/CSA 2.3, Gas-fired Central Furnaces , 2016.

ANSI Z21.50/CSA 2.22, Vented Decorative Gas Appliances , 2016.

ANSI Z21. 54/CSA 8.4, Gas Hose Connectors for Portable Outdoor Gas-Fired Appliances, 2014.

ANSI Z21.56/CSA 4.7, Gas-fired Pool Heaters , 2017.

ANSI Z21.60/CSA 2.26, Decorative Gas Appliances for Installation in Solid-Fuel Burning Fireplaces , 2017.

ANSI Z21. 69/CSA 6.16, Connectors for Movable Gas Appliances, 2009 2015 .

ANSI Z21.75/CSA 6.27, Connectors for Outdoor Gas Appliances and Manufactured Homes, 2007,reaffirmed 2012 2016 .

ANSI Z21.80/CSA 6.22, Line Pressure Regulators, 2011, reaffirmed 2016 .

ANSI Z21.86/CSA 2.32, Vented Gas-fired Space Heating Appliances , 2016.

ANSI Z21. 90/CSA 6.24, Gas Convenience Outlets and Optional Enclosures, 2015.

ANSI Z21.93/CSA 6.30, Excess Flow Valves for Natural and LP-Gas with Pressures Up to 5 psig, 20132017 .

ANSI Z21.97/CSA 2.41, Outdoor Decorative Gas Appliances , 2017.

ANSI Z83.4/CSA 3.7, Non-Recirculating Direct Gas-Fired Industrial Air Heaters, 2015 Heating andForced Ventilation Appliances for Commercial and Industrial Application , 2017 .

ANSI Z83.18, Recirculating Direct Gas-Fired Industrial Air Heaters, 2015.

2.


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Heating and Forced Ventilation Appliances for Commercial and Industrial Application , 2017.

ANSI Z83.19/CSA 2.35, Gas-fired High-Intensity Infrared Heaters , 2017.

ANSI Z83.20/CSA 2.34, Gas-fired Tubular and Low-intensity Infrared Heaters , 2016.

2. 3.4 MSS Publications.

Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street, NE, Vienna, VA22180-4602, (703) 281-6613, www.msshq.org.

ANSI/MSS SP-58, Pipe Hangers and Supports — Materials, Design, Manufacture, Selection, Application,and Installation, 2009.

2.3.5 UL Publications.

Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096, www.ul.com.

ANSI/UL 103, Chimneys, Factory-Built, Residential Type and Building Heating Appliances, 2010,reapproved 2012 revised 2017 .

ANSI/UL 441, Gas Vents, 2010, reapproved 2014 2016 .

ANSI/UL 467, Grounding and Bonding Equipment, 2013.

ANSI/UL 641, Type L Low-Temperature Venting Systems, 2010, reapproved 2013 revised 2016 .

ANSI/UL 651, Schedule 40 and 80 Rigid PVC Conduit and Fittings, 2011, reapproved 2014 revised 2016 .

ANSI/UL 959, Medium Heat Appliance Factory-Built Chimneys, 2010, reapproved revised 2014.

ANSI/UL 1738, Venting Systems for Gas Burning Appliances, Categories II, III and IV, 2010, reapprovedrevised 2014.

ANSI/UL 1777, Chimney Liners, 2015.

ANSI/UL 2158A, Clothes Dryer Transition Ducts, 2013.

ANSI/UL 2561, 1400 Degree Fahrenheit Factory-Built Chimneys, 2009 2016 , reapproved 2013 revised2018 .

UL 378, Draft Equipment, 2006, reapproved revised 2013.

2.3.6 U.S. Government Publications.

U.S. Government Publishing Office, Washington, DC 20401-0001, www.gpo.gov.

Title 49, Code of Federal Regulations, Part 192, “Transportation of Natural and Other Gas by Pipeline:Minimum Federal Standards.”

2.3.7 Other Publications.

Merriam-Webster’s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA, 2003.

2.4 References for Extracts in Mandatory Sections.

NFPA 31, Standard for the Installation of Oil-Burning Equipment, 2016 edition.


NFPA 88A, Standard for Parking Structures,2015 2019 edition.

NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems,2015 2018 edition.

NFPA 101®, Life Safety Code®,2015 2018 edition.

NFPA 501, Standard on Manufactured Housing, 2017 edition.

NFPA 5000®, Building Construction and Safety Code®,2015 2018 edition.


Committee: NFG-AAA


Committee Statement

Committee Updating references to their most recent editions. Also adding new referenced


Statement: documents.




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First Revision No. 61-NFPA 54-2018 [ Section No. 3.3.3 ]

3.3.3 Air Conditioning.

The treatment of air so as to control simultaneously its temperature, humidity, cleanness, and distribution tomeet the requirements of a conditioned space.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This definition is not needed. Air Conditioning is a widely used term that does not need to bedefined in the Code as the definition is essentially identical to the dictionary definition.

ResponseMessage:

FR-61-NFPA 54-2018



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First Revision No. 62-NFPA 54-2018 [ Section No. 3.3.5 [Excluding any Sub-Sections] ]

Any device that utilizes a fuel to produce light, heat, power, refrigeration, or air conditioning; or any devicethat compresses fuel gas .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The revision will include CNG fueling appliances under the appliance definition and make themsubject to the code’s requirements. CNG fuel appliances are used to compress natural gas. CNGappliances are covered under section 10.28.

ResponseMessage:

FR-62-NFPA 54-2018



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First Revision No. 63-NFPA 54-2018 [ Section No. 3.3.5.1 ]

3.3.5.1 Automatically Controlled Appliance.

Appliance equipped with an automatic burner ignition and safety shutoff device and other automaticdevices.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The term is not used in the Code, other than in the definition. Terms that are not used in thedocument should not be defined.

ResponseMessage:

FR-63-NFPA 54-2018



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First Revision No. 64-NFPA 54-2018 [ Section No. 3.3.5.5.1 ]

3.3.5.5.1 Baking and Roasting Gas Oven.

An oven primarily intended for volume food preparation that is composed of one or more sections or units ofthe following types: (1) cabinet oven, an oven having one or more cavities heated by a single burner orgroup of burners; (2) reel-type oven, an oven employing trays that are moved by mechanical means; or (3)sectional oven, an oven composed of one or more independently heated cavities.


Committee: NFG-AAA


Committee Statement

Committee Statement: The term is being revised to match what is used in the code.


Public Input No. 6-NFPA 54-2018 [Section No. 3.3.5.5.1]



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3.3.5.5.4 Gas Range.

A self-contained gas range providing for cooking, roasting, baking, or broiling, or any combination of thesefunctions, and not designed specifically for domestic use.


Committee: NFG-AAA


Committee Statement

Committee Statement: The definition is not needed as the term is defined in dictionaries.





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3.3.5.5.5 Gas Steam Cooker.

An appliance that cooks, defrosts, or reconstitutes food by direct contact with steam.


Committee: NFG-AAA


Committee Statement

Committee Statement: Revising the term to match what is used in the code.





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3.3.5.5.6 Gas Steam Generator.

A separate appliance primarily intended to supply steam for use with food service appliances.


Committee: NFG-AAA


Committee Statement

Committee Statement: Updating term to match what is used in the code.





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3.3.5.8 Nonresidential, Low-Heat Appliance.An appliance needing a chimney capable of withstanding a continuous flue gas temperature notexceeding 1000°F (538°C).3.3.5.9 Nonresidential, Medium-Heat Appliance.An appliance needing a chimney capable of withstanding a continuous flue gas temperature notexceeding 1800°F (982°C).


Committee: NFG-AAA


Committee Statement

Committee Statement: This revision makes the terms consistent with their use in the code.



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3.3.23 Condensate (Condensation) .

The liquid that separates from a gas (including flue gas) due to because of a reduction in temperature oran increase in pressure.


Committee: NFG-AAA


Committee Statement

Committee Statement: Revising the definition for clarity. The definition does not apply to condensation.



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3.3.26 Cubic Foot (ft3) of Gas.

The amount of gas that would occupy 1 ft3 (0.03 m3) when at a temperature of 60°F (16°C), saturated withwater vapor and under a pressure equivalent to that of 30 in. w.c. (7.5 kPa mercury (101 kPa ).


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision fixes a conversion error. The definition used in Z223.1 and other technicalsources is taken at one atmosphere = 30 in. mercury.

ResponseMessage:

FR-125-NFPA 54-2018


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First Revision No. 135-NFPA 54-2018 [ New Section after 3.3.34 ]

3.3.35 Engineering Methods . Design methods that rely on the application of mathematics, sciences,empirical evidence, and engineering principles.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The term "engineering method" has been used in the Code for a number of years, and there havebeen different interpretations of who can perform designs using an engineering method. The resultsof some engineering calculations can be summarized in tables, and graphs, or automated insoftware. Examples of these calculations include the pipe sizing and venting tables included in thisCode which summarize the results in a format that can be used by a qualified agency.

ResponseMessage:

FR-135-NFPA 54-2018



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First Revision No. 148-NFPA 54-2018 [ Sections 3.3.56.1, 3.3.56.2 ]

Sections 3.3.56.1, 3.3.56.2

3.3.56.1 Nonrecirculating Direct Gas-Fired Nonrecirculating Industrial Air Heater Heating and ForcedVentilation Appliances for Commerical and Industrial Application .

A nonrecirculating industrial air heater direct gas-fired heating and forced ventilation appliance in which allthe products of combustion generated by the appliance are released into the outdoor airstream beingheated.

3.3.56.2 Recirculating Direct Gas-Fired Recirculating Industrial Air Heater.

An air recirculating heater

Heating and Forced Ventilation Appliances for Commercial and Industrial Application.

A recirculating direct gas-fired heating and forced ventilation appliance in which all of the products ofcombustion generated by the appliance are released into the airstream being heated.



FR-148_3.3.56.1_legislative_changes.docx for staff use


Committee: NFG-AAA

Submittal Date: Wed Nov 07 10:24:46 EST 2018

Committee Statement

CommitteeStatement:

Editorial correction to use the current titles and definitions of these appliances from the ANSIZ83.4/CSA 3.7 and ANSI Z83.18 standards, respectively.

ResponseMessage:

FR-148-NFPA 54-2018



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3.3.78 Point of Delivery. The location point where the customer owned fuel gas piping begins.

3.3.78.1 Natural Gas. The outlet of the service meter assembly or the outlet of the service regulator orservice shutoff valve where no meter is provided.

3.3.78.2 Undiluted Liquefied Petroleum Gas. The outlet of the final pressure regulator, exclusive of linegas regulators, where no meter is installed. Where a meter is installed, the point of delivery is the outlet ofthe meter.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The point of delivery term is used in many locations within the code but there was no definitionprovided. The term is defined in scoping section 1.1.1.1 (A) which may be overlooked or hard tofind by code users. The change would improve the code’s clarity.

ResponseMessage:

FR-134-NFPA 54-2018



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First Revision No. 20-NFPA 54-2018 [ New Section after 3.3.78.4 ]

3.3.78.5 Supply Pressure.

The gas pressure measured at the inlet to the appliance.


Committee: NFG-AAA

Submittal Date: Tue Sep 18 15:22:17 EDT 2018

Committee Statement

CommitteeStatement:

The term supply pressure is used throughout the document and a definition isappropriate.




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3.3.81 Qualified Agency.

Any individual, firm, corporation, or company that either in person or through a representative is engaged inand is responsible for (1) the design, installation, testing, or replacement of gas piping or (2) theconnection, installation, testing, repair, or servicing of appliances and equipment; that is experienced insuch work; that is familiar with all precautions required; and that has complied with all the requirements ofthe authority having jurisdiction.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The revision does not change the meaning or intent of the definition but further clarifies thestages of a project that must comply with the code.

ResponseMessage:

FR-69-NFPA 54-2018



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3.3.88 Service Meter Assembly.

The meter, valves, piping, fittings, and fittings equipment installed by the serving gas supplier to connectthe inlet side of the meter to the gas service and to connect the outlet side of the meter to the gas supplyto the customer’s house or yard piping.



FR-136_3.3.88_legislative_changes.docx for staff use


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This definition is revised to clarify that the assembly includes the meter as well as any piping,valves, fittings, and equipment installed by the gas supplier and that such piping, valves, fittings,and equipment can be on the inlet and outlet of the actual meter.

ResponseMessage:

FR-136-NFPA 54-2018



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3.3.95.7.1 Forced Mechanical Draft Venting System.

A venting system in which a fan or other mechanical device is used to cause the flow of flue or vent gasesunder positive vent pressure.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The term is not used in the Code, and therefore should not be defined in the Code. Alsoredundant definition.




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3.3.97 Thread Joint Compounds.

Nonhardening materials used on pipe threads to ensure a seal.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The term is used only in 5.6.6.4. The definition is deleted and 5.6.6.4 is revised in a separaterevision to include the definition.

ResponseMessage:

FR-16-NFPA 54-2018



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A device used in piping to control the gas supply to any section of a system of piping or to an appliance.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The definition of "valve" is not needed as there are 9 definitions of the different types of valves.Also as used in the Code the dictionary definition is more than adequate.

ResponseMessage:

FR-2-NFPA 54-2018

Public Input No. 18-NFPA 54-2018 [Section No. 3.3.99 [Excluding any Sub-Sections]]


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3.3.99.1 Appliance Shutoff Valve.

A valve located in the piping system used to shut off the fuel gas to an individual equipment appliance .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The valve does not shut off an appliance but does shut off the fuel gas to the appliance. Manycommon gas appliances have both a gas and an electric supply. The existing definition implies thatboth the gas and electric supply is shut off by the use of the gas valve. "Located in the pipingsystem" was removed because it was redundant and unnecessary.

ResponseMessage:

FR-3-NFPA 54-2018



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3.3.99.7 System Shutoff Valve.

A valve installed after the point of delivery to shut off the fuel gas to the entire piping system.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Add a new definition for system shutoff valves since that term is used in section 7.8.1.1 (formerlycalled main shutoff valve). The new definition is also needed to define the term for new section 7.8.4.The natural gas utility’s service shutoff valve has been used to serve as a building owner’smaintenance valve and the emergency shutoff valve, especially in many single and double familybuildings and other light commercial locations. Federal regulations now require that these valves beoperated only by a qualified person. Home owners and other members of the public are notconsidered to be a qualified person and therefore they should not operate the service shutoff valve. Inresponse to this, some gas utilities have begun to install a second whole building shutoff valve afterthe point of delivery. New section 7.8.4 provide coverage for these valves.

ResponseMessage:

FR-7-NFPA 54-2018

Public Input No. 93-NFPA 54-2018 [New Section after 3.3.99.6]


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3.3.99.6 Service Shutoff Valve.

A valve, installed by the serving gas supplier between the service meter or source of supply and thecustomer piping system, to shut off the fuel gas to the entire piping system.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The valve does not shut off the piping but does shut off the fuel gas entering the piping."Service meter" was removed because this valve could be before the meter.

ResponseMessage:

FR-4-NFPA 54-2018



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4.1 Qualified Agency.

Installation, The following shall be performed only by a qualified agency:

(1) The design, installation, testing, purging, and replacement of gas piping, appliances, oraccessories equipment , and accessories.

(2) The repair and servicing of equipment, shall be performed only by a qualified agency appliances andequipment .



FR-75_4.1_legislative_changes.docx for staff use


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This change is a result of a revision to the definition under FR 69. Also this revisionimproves grammar.


Public Input No. 183-NFPA 54-2018 [Section No. 4.1]


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4.3.2.1 * Drip Liquids.

Liquid that is removed from a drip in existing gas piping shall be handled to avoid spillage or ignition. Thegas supplier shall be notified when drip liquids are removed.

A.4.3.2.1Gas suppliers intend to provide gas that is free of liquids. Where liquids or condensates are removed froma drip, the gas supplier can be notified if it is determined that the liquid accumulation impedes theappliance operation or if the liquid accumulation appears to be at an unusual rate. This could mean that thegas supplier's liquid removal equipment has failed or is in need of service.

Handling and disposal of liquids may need to be done with the consideration of an industrial hygienist toavoid possible contact with trace amounts of Benzene. Contact the gas supplier for an SDS or considerlaboratory sampling before handling or disposing of liquids.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Removal of drip liquids does not always require notifying the gas supplier because liquids canaccumulate for a variety of reasons that may not impede the performance of the appliances orequipment. Annex material was added for guidance.

ResponseMessage:

FR-76-NFPA 54-2018



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First Revision No. 58-NFPA 54-2018 [ New Section after 4.4 ]

4.5 Engineering Methods. Where an engineering method, is used to calculate flow of air or gas, or todetermine the size of gas pipe or a gas vent, the Authority Having Jurisdiction shall have the authority torequire submittal of any or all of the following:

(1) Calculations including documentation that the method used is published and recognized as being validfor the calculations provided.

(2) The name of any software used, input and output developed and documentation that the software isrecognized as being valid for the calculations provided.

(3)* The name of the person that performed the calculation or design, along with their qualifications toperform the calculation or design.

A.4.5(3) The person performing the calculation or design can be:

1. A registered/licensed professional engineer, with their stamp or registration/license number and State ofregistration/license.

2. A degreed engineer who is not registered/licensed.

3. Anyone who has experience in using the calculation method, along with a statement of their experience.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision clarifies what an engineering method is and who can use such method. This codifieswhat has been allowed in the Code for decades, the use of pipe and vent sizing tables which areused by designers and Authorities Having Jurisdiction. It also will require the person submitting thecalculation to provide their qualifications on the method used.

ResponseMessage:

FR-58-NFPA 54-2018

Public Input No. 122-NFPA 54-2018 [New Section after 4.4]


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5.2 Provision for Location of Point of Delivery.

The location of the point of delivery shall be acceptable to the serving gas supplier.


Committee: NFG-AAA


Committee Statement

Committee Statement: This requirement is outside the scope of this code.




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5.4.3* Sizing Methods.

Gas piping shall be sized in accordance with one of the following:

(1) Pipe sizing tables or sizing equations in Chapter 6

(2) Other approved engineering methods

(3) Sizing tables included in a listed piping system manufacturer’s installation instructions

(4) Approved engineering methods


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The word "other" implies an alternate. As a list of options, all 3 options are equally acceptableand there is no need to include "other". The options have been reordered to reflect industrypractice.

ResponseMessage:

FR-10-NFPA 54-2018



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5.4.4 Allowable Pressure Drop.

The design pressure loss in any a piping system under maximum probable flow conditions, demand fromthe point of delivery to the inlet connection of the appliance, all appliances served shall be such that thesupply pressure at the each appliance inlet is greater than or equal to the minimum pressure required bythe appliance.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Sections 5.4.2.1 and 5.4.2.3 already state that the piping is designed based on the total connectedload. This assumes that all appliances are firing at maximum input. The phrase “under maximumprobable flow conditions” is unclear and undefined. There is no reason to clarify it because the othercode sections already spell out the intent. The unclear phrase was replaced with maximum demandwhich is specified above. As revised, 5.4.4 says that each appliance served must see it’s requiredminimum inlet pressure, and any excess pressure can be lost in pipe friction in the pipe sizingmethod used.

ResponseMessage:

FR-11-NFPA 54-2018



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5.5.4 Maximum Operating Pressure in Buildings.

The maximum operating pressure for any piping systems located inside buildings shall not exceed 5 psi(34 kPa) unless one or more of the following conditions are met:

(1)

(2) The piping is joined by fittings listed to ANSI LC4/CSA 6.32, Press-Connect Metallic Fittings for Usein Fuel Gas Distribution Systems , and installed according to the manufacturer's installatoninstructions.

(3) The piping joints are flanged and all pipe-to-flange connections are made by welding or brazing.

(4) The piping is located in a ventilated chase or otherwise enclosed for protection against accidental gasaccumulation.

(5) The piping is located inside buildings or separate areas of buildings used exclusively for one of thefollowing:

(6) Industrial processing or heating

(7) Research

(8) Warehousing

(9) Boiler or mechanical rooms

(10) The piping is a temporary installation for buildings under construction.

(11) The piping serves appliances or equipment used for agricultural purposes.

(12) The piping system is an LP-Gas piping system with an operating pressure greater than 20 psi(138 kPa) and complies with NFPA 58.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Press-Connect fittings listed to ANSI LC4 are listed for up to 125 psi fuel gas systems. Thisrevision includes an additional joining method for systems over 5 PSI inside buildings.

ResponseMessage:

FR-12-NFPA 54-2018


* The piping joints are welded or brazed.


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First Revision No. 13-NFPA 54-2018 [ Detail ]

5.6* Acceptable Piping Materials and Joining Methods.


Committee: NFG-AAA


Committee Statement

Committee Statement: "Acceptable" is not needed in this title.




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5.6.1.3 Other Materials.

Material not covered by the standards specifications listed herein shall meet the following criteria:

(1) Be investigated and tested to determine that it is safe and suitable for the proposed service

(2) Be recommended for that service by the manufacturer

(3) Be acceptable to the authority having jurisdiction


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Materials not specified in the code are covered by the equivalency clause in Section 1.4 andthis deletion removes subjective language.

ResponseMessage:

FR-14-NFPA 54-2018


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5.6.6.4* Thread Joint Compounds.

Thread joint compounds shall be resistant to the action of LP-Gas or to any other

Sealing.

5.6.6.4.1 Threaded joints shall be made using a thread joint sealing material.

5.6.6.4.2 Thread joint sealing materials shall be compatible with the pipe and fitting material on which thecompounds are used.

5.6.6.4.3 Thread joint sealing materials shall be non-hardening and shall be resistant to the chemicalconstituents of the gases to be conducted through the piping.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The text is revised to define the material in the requirement and no longer need a definition inChapter 3. The specific mention of LP-gas was removed as the requirement is applicable to all fuelgases. In addition, the code did not previously require the use of sealing materials, so arequirement has been added to reflect industry practice.

ResponseMessage:

FR-15-NFPA 54-2018



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5.6.8 Plastic Piping Joints and Fittings.

Plastic pipe, tubing, and fittings shall be joined in accordance with the manufacturers’ instructions. Thefollowing shall be observed when making such joints:

(1) The joint shall be designed and installed so that the longitudinal pullout resistance of the joint will be atleast equal to the tensile strength of the plastic piping material.

(2) Heat fusion joints shall be made in accordance with qualified procedures that have been establishedand proven by test to produce gastight joints at least as strong as the pipe or tubing being joined.Joints shall be made with the joining method recommended by the pipe manufacturer. HeatPolyethylene heat fusion fittings shall be marked “ASTM D2513.” Polyamide heat fusion fittings shallbe marked “ASTM F2945.”

(3) Where compression-type mechanical joints are used, the gasket material in the fitting shall becompatible with the plastic piping and with the gas distributed by the system. An internal tubular rigidstiffener shall be used in conjunction with the fitting. The stiffener shall be flush with the end of the pipeor tubing and shall extend at least to the outside end of the compression fitting when installed. Thestiffener shall be free of rough or sharp edges and shall not be a force fit in the plastic. Split tubularstiffeners shall not be used.

(4) Plastic piping joints and fittings for use in LP-Gas piping systems shall be in accordance with NFPA 58.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Revising this section to include polyamide pipe heat fusion fittings and making a change in TableA.5.6. The ASTM F2945 standard was added into the 2018 edition but the committee did notreview the fitting section to include heat fusion fittings made of the material.

ResponseMessage:

FR-30-NFPA 54-2018


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5.8.6 Bypass Piping.

Valved and regulated bypasses shall be permitted to be placed around gas line pressure regulators wherecontinuity of service is imperative.


Committee: NFG-AAA


Committee Statement

Committee Statement: The paragraph is not needed. It allows a bypass which is not prohibited by the code.




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5.12 Shutoff Valves. ADD NEW TABLE AS FOLLOWS:



54_FR22_5.12.docx Staff use- table


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision provides code users with a valve selection table based on available and acceptablevalve standards. The table will help ensure the appropriate valve is selected for the intendedapplication. The requirement to be labeled has been added to facilitate inspection and to identifythat the device complies with a standard.

ResponseMessage:

FR-22-NFPA 54-2018



Table 5.12 Manual Gas Valve Standards

Shutoff Valve Application Valve Meeting the Following Standards

Appliance Shutoff Valve Up to ½ psi

ANSI Z21.15/CSA 9.1 ASME B16.44 ASME B16.33 marked 125 G ANSI LC-4/CSA 6.32

Valve Up to ½ psi ASME B16.44, ASME B16.33 marked 125 G ANSI LC-4/CSA 6.32

Valve Up to 2 psi ASME B16.44 labeled 2G ASME B16.33 marked 125 G ANSI LC-4/CSA 6.32 with ASME B16.44 labeled 2G or labeled 5G ANSI LC-4/CSA 6.32 with ASME B16.33marked 125 G

Valve Up to 5 psi ASME B16.44 labeled 5G ASME B16.33 ANSI LC-4/CSA 6.32 with ASME B16.44 marked 5G ANSI LC-4/CSA 6.32 with ASME B16.33 marked 125 G

Valve Up to 125 psi ASME B16.33 marked 125 G ANSI LC-4/CSA 6.32 with ASME B16.33 marked 125 G

For SI: 1 pound per square inch gauge = 6.895 kPa.

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5.13 Excess Flow Valve(s).

Where automatic excess flow valves are installed, they shall be listed to in accordance with ANSIZ21.93/CSA 6.30, Excess Flow Valves for Natural and LP-Gas with Pressures Up to 5 psig, and shall besized and installed in accordance with the manufacturers' instructions.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Editorial change to use consistent language in the code when requiring appliances orcomponents to be listed to a specific standard.

ResponseMessage:

FR-23-NFPA 54-2018



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First Revision No. 24-NFPA 54-2018 [ Section No. 7.1.2.1(B) ]

(B) *

Where a minimum of 12 in. (300 mm) of cover cannot be provided, the pipe piping shall be installed inconduit or bridged (shielded) .

A.7.1.2.1(B) Conduit as used here is intended to represent metallic or nonmetallic surround, whichprovides mechanical protection for the underground piping .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

“Pipe” includes only rigid pipe products such as schedule 40. “Piping” includes both rigid andtubing products. Tubing should be allowed to be installed less than the 12-inch minimum where itis protected.

In addition, bridge (shielded) was removed because it is too ambiguous. Annex material wasadded to clarify that conduit is not limited to electrical conduit.

ResponseMessage:

FR-24-NFPA 54-2018

Public Input No. 99-NFPA 54-2018 [Section No. 7.1.2.1(B)]


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7.1.3.10Underground metallic piping that conveys LP-Gas from a gas storage container shall be provided withdielectric fittings installed above ground and outdoors at the building to electrically isolate it from theaboveground portion of the fixed piping system that enters a building.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Underground piping that runs from an LP-Gas container into a home may be subject to increasedcorrosive forces where it is not isolated from the aboveground piping systems. Natural Gas Utilitiesare required by federal regulations to provide such isolate on their systems. This requirement isalso consistent with NFPA 58.

ResponseMessage:

FR-25-NFPA 54-2018



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7.1.5 Piping Through Foundation Wall.

Piping through foundation wall shall comply with all of the following:

(1) Underground piping, where installed through the outer foundation or basement wall of a building, shallbe encased in a protective sleeve or protected by an approved device or method.

(2) The space spaces between the gas piping and the sleeve and between the sleeve and the wall shallbe sealed to prevent entry of gas and water.

(3) Sealing materials shall be compatible with the piping and sleeve.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision eliminates the use of sealant materials that could hasten corrosion or otherchemical reaction of the affected components. Importantly, the revision will also promoteconsistency with other building and plumbing codes.

ResponseMessage:

FR-26-NFPA 54-2018



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7.2.1

Piping installed aboveground shall comply with all of the following:

(1) Piping shall be securely supported and located where it will be protected from physical damage.

(2) Where passing through an exterior wall, the piping shall also be protected from corrosion by coating orwrapping with an inert material approved for such applications.

(3) The piping shall be sealed around its circumference at the point of the exterior penetration to preventthe entry of water, insects, and rodents.

(4) Where piping is encased in a protective pipe sleeve, the annular spaces between the gas piping andthe sleeve and between the sleeve and the wall opening shall be sealed.

(5) Piping installed outdoors shall be elevated not less than 3 ½ inches (89 mm) above the ground andwhere installed across roof surfaces, shall be elevated not less than 3 ½ inches (89 mm) above the roofsurface.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Installing above the ground will help ensure that piping is not in contact with corrosiveenvironments and does not sit in standing water. The 3 1/2 inch clearance allows for debris topass underneath rather than be caught.

ResponseMessage:

FR-27-NFPA 54-2018



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7.2.1

(6) Sealing materials shall be compatible with the piping and sleeve.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision eliminates the use of sealant materials that could hasten corrosion or otherchemical reaction of the affected components. Importantly, the revision will also promoteconsistency with other building and plumbing codes.

ResponseMessage:

FR-28-NFPA 54-2018



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7.2.2 * Protective Coating.

Where piping is in contact with a material or an atmosphere corrosive to the piping system, the piping andfittings shall be coated with a corrosion-resistant material. Any such coating used on piping or componentsshall not be considered as adding strength to the system.

A.7.2.2 Painting can be an acceptable method of corrosion protection.


Committee: NFG-AAA


Committee Statement

Committee Statement: Annex material is added to clarify that painting is an acceptable method.




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7.2.6.4 Piping on Roof Tops.

Gas piping installed on the roof surfaces shall be elevated above the roof surface and shall be supported inaccordance with Table 7.2.6.2.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Gas piping elevated above roof surfaces is now covered in 7.2.1. This section applies tohangers, supports, and anchors.

ResponseMessage:

FR-138-NFPA 54-2018


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7.8.2. 1 Accessibility of Gas Valves.

Main gas 7.8.1.1 System shutoff valves controlling several gas piping systems shall be readily accessiblefor operation and installed so as to be protected from physical damage. They

7.8.1.2 System shutoff valves shall be marked with a metal tag or other permanent means attached by theinstalling agency so that the gas piping systems supplied through them can be readily identified.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

A new section and definition is added for "System Shutoff Valves" to replace "Main Gas ShutoffValve" and clarify the difference between the service shutoff valve and system shutoff valve. Thesection is being revised to reflect this change.

This section is being moved from 7.8.2.1 to 7.8.1 because it applies to more than just valvescontrolling multiple systems.

ResponseMessage:

FR-5-NFPA 54-2018



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7.8.4* System Shutoff Valves.

Where a system shutoff valve is installed, the valve shall comply with 5.12.

A.7.8.4 System shutoff valves can serve as the emergency shutoff valve required by 7.8.3.3.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The natural gas utility’s service shutoff valve has been used to serve as a building owner’smaintenance valve and the emergency shutoff valve, especially in many single and double familybuildings and other light commercial locations. Federal regulations now require that these valves beoperated only by a qualified person. Home owners and other members of the public are notconsidered to be a qualified person and therefore they should not operate the service shutoff valve.In response to this, some gas utilities have begun to install a second whole building shutoff valveafter the point of delivery. New section 7.8.4 provides coverage for these valves.

ResponseMessage:

FR-8-NFPA 54-2018



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9.1.1.1

Approved shall mean “acceptable to the authority having jurisdiction.”


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

"Approved" is defined in 3.2.1 as "Acceptable to the Authority Having Jurisdiction, which isrepeated in 9.1.1.1. This redundancy is not needed in the Code.

ResponseMessage:

FR-77-NFPA 54-2018



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9.1.3 Type of Gas(es).

The appliance shall be connected to the fuel gas for which it was designed. No attempt shall be made toconvert the appliance from the gas specified on the rating plate for use with a different gas withoutconsulting the installation instructions, the serving gas supplier, or the appliance manufacturer for completeinstructions. Listed appliances shall not be converted unless permitted by and in accordance with themanufacturer's installation instructions.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The existing requirement was too general resulting in confusion on which appliances can beconverted. Listed appliances should only be converted where permitted by the manufacturer and inaccordance with their specific instructions. The committee has become aware of certain gassuppliers converting listed unvented heaters without referring to the manufacturer's installationinstructions.

ResponseMessage:

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9.1.16 Adequate Capacity of Piping.

When additional appliances are being connected to a gas piping system, the existing piping shall bechecked to determine whether it has adequate capacity. Where the capacity is inadequate, the existingsystem shall be enlarged as necessary, or separate gas piping of adequate capacity shall be run from thepoint of delivery to the appliance.


Committee: NFG-AAA


Committee Statement

Committee Statement: Delete duplicate coverage. The section was moved into 5.1.2 for the 2018 edition.




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9.1.18 Gas Appliance Pressure Regulators.

Where the gas supply pressure is higher than that at which the appliance is designed to operate or variesbeyond the design pressure limits of the appliance, a gas appliance pressure regulator listed in accordancewith ANSI Z21.18/CSA 6.3 shall be installed.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This requires the gas appliance pressure regulator to be listed to the applicable American NationalStandard by an organization acceptable to the code official. Listed is defined in Section 3.2.5 of theCode. A listed regulator provides a level of performance and reliability that an unlisted one maynot.

ResponseMessage:

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9.1.22 * Installation Instructions.

The installing agency installer shall conform to the appliance and equipment manufacturers’recommendations in completing an installation. The installing agency The installer shall leave themanufacturers’ installation, operating, and maintenance instructions in a location on the premises wherethey are readily available .

A.9.1.22 The instructions are needed for reference and guidance of for the authority having jurisdiction,service personnel, and the owner or operator.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This section was edited for clarity and language was moved to the annex because it wasguidance. The term "readily available" was uninforceable.

ResponseMessage:

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9.4.2.3

All appliances Appliances requiring an external source of electrical power for its operation shall beprovided with the following:

(1) A readily accessible electrical disconnecting means within sight of the appliance that completely de-energizes the appliance

(2) A 120 V ac grounding-type receptacle outlet on the roof adjacent to the appliance on the supply sideof the disconnect switch

shall be installed in accordance with NFPA 70, National Electrical Code.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Add a reference to the National Electrical Code (NEC-NFPA 70) to help ensure that the NationalFuel Gas Code does not conflict with NEC requirements. The NEC may have additionalrequirements and may also have outlet requirements based on the type of installations (i.e., multipleappliances on the same roof) which may allow one outlet to serve multiple appliances.

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Appliances and equipment shall be connected to the building piping in compliance with 9.6.5 through 9.6.7by one of the following:

(1) Rigid metallic pipe and fittings.

(2) Semirigid metallic tubing and metallic fittings. Aluminum alloy tubing shall not be used in exteriorlocations.

(3) A connector for gas appliances listed connector in compliance accordance with ANSI Z21.24/CSA6.10, Connectors for Gas Appliances. The connector shall be used in accordance with themanufacturer's installation instructions and shall be in the same room as the appliance. Only oneconnector shall be used per appliance.

(4) A listed connector in compliance connector for outdoor gas appliances and manufactured homes listedin accordance with ANSI Z21.75/CSA 6.27, Connectors for Outdoor Gas Appliances and ManufacturedHomes. Only one connector shall be used per appliance.

(5) CSST where installed in accordance with the manufacturer’s installation instructions. CSST shallconnect only to appliances that are fixed in place.

(6) Listed nonmetallic gas hose connectors in accordance with 9.6.2.

(7) Unlisted gas hose connectors for use in laboratories and educational facilities in accordance with 9.6.3.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:


ResponseMessage:

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9.6.1

(5) CSST where installed in accordance with the manufacturer’s installation instructions. CSST shall not bedirectly routed into a metallic appliance enclosure where the appliance is connected to a metallic vent thatterminates above a roofline. CSST shall connect only to appliances that are fixed in place.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The standard LC1 prohibits the routing of CSST through metallic appliance housings where ametallic vent penetrates the roof. While this prohibition is required to be part of the CSST installationinstructions we have become aware that not all appliance installers are aware of this requirement.Adding this installation instruction into the code would help ensure that CSST is properly installed.

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9.6.1.3 Commercial Cooking Food Service Appliance Connectors.

Connectors used with commercial cooking with food service appliances that are moved for cleaning andsanitation purposes shall be installed in accordance with the connector manufacturer’s installationinstructions. Such connectors shall be listed in accordance with ANSI Z21.69/CSA 6.16, Connectors forMovable Gas Appliances.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Food service appliance is a defined term and should be used instead of the undefined term"commercial cooking appliance".

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9.6.2 Use of Nonmetallic Gas Hose Connectors.

Listed gas hose connectors shall be used in accordance with the manufacturer's installation instructionsand as follows:

(1) Indoor. Indoor gas hose connectors shall be used only to connect laboratory, shop, and ironingappliances requiring mobility during operation and installed in accordance with the following:

(2) An appliance shutoff valve shall be installed where the connector is attached to the buildingpiping.

(3) The connector shall be of minimum length and shall not exceed 6 ft (1.8 m).

(4) The connector shall not be concealed and shall not extend from one room to another or passthrough wall partitions, ceilings, or floors.

(5) Outdoor. Where outdoor gas hose connectors are used to connect portable outdoor appliances, theconnector shall be listed in accordance with ANSI Z21.54/CSA 8.4 , Gas Hose Connectors for PortableOutdoor Gas-Fired Appliances and installed in accordance with the following:

(6) An appliance shutoff valve, a listed quick-disconnect device, or a listed gas convenience outletshall be installed where the connector is attached to the supply piping and in such a manner so asto prevent the accumulation of water or foreign matter.

(7) This connection shall be made only in the outdoor area where the appliance is to be used.





Committee: NFG-AAA


Committee Statement

Committee Statement: Editorial change to include the full designation of the standard.




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9.6.6.1

Quick-disconnect devices used to connect appliances to the building piping shall be listed to in accordancewith ANSI Z21.41/CSA 6.9, Quick-Disconnect Devices for Use with Gas Fuel Appliances.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:


ResponseMessage:

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10.1.1* Application.

Listed appliances Appliances shall be installed in accordance with the manufacturers' installationinstructions or and , as elsewhere specified in this chapter, as applicable to the appliance. Unlistedappliances shall be installed as specified in this chapter as applicable to the appliances.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The requirement is revised so that the first sentence applies to all appliances, whetherlisted or unlisted.




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10.2.1

Application.

Gas-fired air conditioners and heat pumps shall be listed in accordance with ANSI Z21.40.1/CSA 2.91,Gas-fired Heat Activated Air Conditioning and Heat Pump Appliances, or ANSI Z21.40.2/CSA 2.92, AirConditioning and Heat Pump Appliances (Internal Combustion).

10.2.2 Independent Gas Piping.

Gas piping serving heating appliances shall be permitted to also serve cooling appliances where heatingand cooling appliances cannot be operated simultaneously.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision requires products to be listed to the applicable American National Standard by anorganization acceptable to the code official. If there is not an acceptable standard, the authorityhaving jurisdiction has the option under 1.4, Equivalency, to allow unlisted products to be installed.

Requiring listing provides some assurance that the appliance is safe for the intended purpose.

ResponseMessage:

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10.2 Air-Conditioning Appliances (Gas-Fired Air Conditioners and Heat Pumps) .

10.2.2 Connection of Gas Engine–Powered Air Conditioners.

To protect against the effects of normal vibration in service, gas Gas engines shall not be rigidlyconnected to the gas supply piping.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The title of the Section is revised to eliminate the parenthetical phrase. Paragraph 10.2.2 isrevised to remove explanatory material.

ResponseMessage:

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10.2.3 Clearances for Indoor Installation.

The installation of air-conditioning appliances shall comply with the following requirements:

(1) Listed aAir-conditioning appliances shall be installed with clearances in accordance with the manufacturer’s instructions.

(2) Unlisted air-conditioning appliances shall be installed with clearances from combustible material of not less than 18 in. (460 mm) above the appliance and at the sides, front, and rear and in accordance with the manufacturer's installation instructions.

(3) Listed and unlisted aAir-conditioning appliances shall be permitted to be installed with reduced clearances to combustible material, provided that the combustible material or appliance is protected as described in Table 10.2.3 and such reduction is allowed by the manufacturer's installation instructions.

(4) Where the furnace plenum is adjacent to plaster on metal lath or noncombustible material attached to combustible material, the clearance shall be measured to the surface of the plaster or other noncombustible finish where the clearance specified is 2 in. (50 mm) or less.

(5) Listed aAir-conditioning appliances shall have the clearance from supply ducts within 3 ft (0.9 m) of the furnace plenum be not less than that specified from the furnace plenum. No clearance is necessary beyond this distance.

Approved


File Name

54_FR_87_10.2.3.docx

Description

Staff use- tracked changes


Committee: NFG-AAA


Committee Statement

Committee The section is revised to apply to listed appliances. This revision aligns with the effort to require

Statement: products to be listed to the applicable American National Standard by an organization acceptable tothe code official. If there is not an acceptable standard, the authority having jurisdiction has theoption under 1.4, Equivalency, to allow unlisted products to be installed.


Response FR-87-NFPA 54-2018Message:


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10.2.4 Assembly and Installation.

Air Unless the air -conditioning appliances shall be installed in accordance with the manufacturer’sinstructions. Unless the appliance is listed for installation on a combustible surface such as a floor or roof,or unless the surface is protected in an approved manner, it shall be installed on a surface ofnoncombustible construction with noncombustible material and surface finish and with no combustiblematerial against the underside thereof.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This section is revised to delete "installed in accordance with the manufacturer's instructions",as it is stated in 10.1.1 where it is applicable to all appliances.

ResponseMessage:

FR-141-NFPA 54-2018



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Air-conditioning appliances shall be installed in accordance with the manufacturer’s instructions. Unless theappliance is listed for installation on a combustible surface such as a floor or roof, or unless the surface isprotected in an approved manner, it shall be installed on a surface of noncombustible construction withnoncombustible material and surface finish and with no combustible material against the underside thereof.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Paragraph 10.2.4 is revised to remove examples. Such lists of examples are nevercomplete, and can cause confusion.

This revision removes "such as a floor or roof" only. The rest of the section is being revisedby FR 141.

ResponseMessage:

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10.2.5 Furnace Plenums and Air Ducts.

A furnace plenum supplied as a part of the air-conditioning appliance shall be installed in accordance withthe manufacturer’s instructions. Where a furnace plenum is not supplied with the appliance, any fabricationand installation instructions provided by the manufacturer shall be followed. The method of connectingsupply and return ducts shall facilitate proper circulation of air. Where the air Where an air conditioner isinstalled within an enclosure, the installation shall comply with 10.3.7.4.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Following manufacturer's installation instructions is specified in 10.1.1 and is applicable to allappliances. It does not need to be repeated here. In addition, the requirements are covered bythe reference to 10.3.

ResponseMessage:

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10.2.7 Switches in Electrical Supply Line.

Means for interrupting the electrical supply to the air-conditioning appliance and to its associated coolingtower (if supplied and installed in a location remote from the air conditioner) shall be provided within sightof and not over 50 ft (15 m) from the air conditioner and the cooling tower shall be in accordance withNFPA 70, National Electrical Code .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision adds a reference to the National Electric Code (NEC-NFPA 70) to help ensurethat the National Fuel Gas Code does not conflict with NEC requirements.

ResponseMessage:

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10.3.1

Application.

10.3.1.1 Central heating furnaces and boilers having input ratings up to and including 400,000 Btu/hrshall be listed in accordance with the following as applicable:

(1) Furnaces listed in accordance with ANSI Z21.47/CSA 2.3, Gas-fired Central Furnaces.

(2) Low-pressure boilers listed in accordance with ANSI Z21.13/CSA 4.9, Gas-Fired Low-PressureSteam and Hot Water Boilers.

10.3.1.2* Furnaces and boilers having input ratings greater than 400,000 Btu/hr shall be listed or inaccordance with 9.1.1.3 and 9.1.1.4.

A.10.3.1.2 Listing standards for furnaces or low-pressure boilers having input ratings greater than400,000 Btu/hr include UL 795, Standard for Commercial-Industrial Gas Heating Equipment or ANSIZ21.13/CSA 4.9, Gas-Fired Low-Pressure Steam and Hot Water Boilers.

10.3.2 Location.

Central heating furnace and low-pressure boiler installations in bedrooms or bathrooms shall comply withone of the following:

(1) Central heating furnaces and low-pressure boilers shall be installed in a closet equipped with aweather-stripped door with no openings, and with a self-closing device. All combustion air shall beobtained from the outdoors in accordance with 9.3.3.

(2) Central heating furnaces and low-pressure boilers shall be of the direct vent type.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision requires products with input ratings up to 400,000 Btu/hr to be listed to the applicableAmerican National Standard by an organization acceptable to the code official. This size wasspecified because it covers most common residential and commercial appliances. If there is not anacceptable standard, the authority having jurisdiction has the option under 1.4, Equivalency, as wellas with the reference to Chapter 9, to allow unlisted products to be installed.


ResponseMessage:

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Listed and unlisted central Central heating furnaces and low-pressure boilers shall be permitted to beinstalled with reduced clearances to combustible material, provided that the combustible material orappliance is protected as described in Table 10.2.3 and Figure 10.3.2.3(a) through Figure 10.3.2.3(c), andsuch reduction is allowed by the manufacturer's installation instructions.

Figure 10.3.2.3(a) Extent of Protection Necessary to Reduce Clearances from Gas Appliance orVent Connectors.

Figure 10.3.2.3(b) Wall Protector Clearance Reduction System.

Figure 10.3.2.3(c) Masonry Clearance Reduction System.


10.3.2.3


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Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision is editorial because the section applied to all (listed and unlisted) appliancescovered by 10.3.




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10.3.7.4

Where a furnace is installed so supply ducts carry air circulated by the furnace to areas outside the spacecontaining the furnace, the return air shall also be handled by a duct(s) sealed to the furnace casing andterminating outside the space containing the furnace. Return air shall not be taken from the mechanicalroom containing the furnace.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision would help to prevent some installers from claiming that the 10.3.7.4 return air ductsealing requirement is not needed when they add a small opening in the supply duct in themechanical room.

ResponseMessage:

FR-143-NFPA 54-2018



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10.4 Clothes Dryers.

10.4. 1 Application.

Clothes dryers shall be listed in accordance with ANSI Z21.5. 1 /CSA 7.1, Gas Clothes Dryer, Volume I,Type 1 Clothes Dryers , or ANSI Z21.5.2/CSA 7.2, Gas Clothes Dryer, Volume II, Type 2 Clothes Dryers .

10.4.2 Clearance.

The installation of clothes dryers shall comply with the following requirements:

(1) Listed Type 1 clothes dryers shall be installed with a minimum clearance of 6 in. (150 mm) fromadjacent combustible material. Clothes dryers listed for installation at reduced clearances shall beinstalled in accordance with the manufacturer's installation instructions. Type 1 clothes dryers installedin closets shall be specifically listed for such installation.

(2) Listed Type 2 clothes dryers shall be installed with clearances of not less than those shown on themarking plate and in the manufacturer's instructions. Type 2 clothes dryers designed and marked “Foruse only in noncombustible locations” shall not be installed elsewhere.

(3) Unlisted clothes dryers shall be installed with clearances to combustible material of not less than 18 in.(460 mm). Combustible floors under unlisted clothes dryers shall be protected in an approved manner.

10.4.2 3 Exhausting to the Outdoors.

Type 1 and Type 2 clothes dryers shall be exhausted to the outdoors.

10.4.3 4 Provisions for Make-Up Air.

10.4.3 4 .1

Make-up air shall be provided for Type 1 clothes dryers in accordance with the manufacturers’ installationinstructions.

10.4.3 4 .2

Provision for make-up air shall be provided for Type 2 clothes dryers, with a minimum free area of

1 in.2/1000 Btu/hr (2200 mm2/kW) total input rating of the dryer(s) installed.

10.4.4 5 Exhaust Ducts for Type 1 Clothes Dryers.

10.4.4 5 .1

A clothes dryer exhaust duct shall not be connected into any vent connector, gas vent, chimney, crawlspace, attic, or other similar concealed space.

10.4.4 5 .2

Ducts for exhausting clothes dryers shall not be assembled with screws or other fastening means thatextend into the duct and that would catch lint and reduce the efficiency of the exhaust system.

10.4.4 5 .3

Exhaust ducts shall be constructed of rigid metallic material. Transition ducts used to connect the dryer tothe exhaust duct shall be listed and labeled in accordance with ANSI/UL 2158A, Clothes Dryer TransitionDucts, and installed in accordance with the clothes dryer manufacturer’s installation instructions.

10.4.5 6 Exhaust Ducts for Type 2 Clothes Dryers.

10.4.5 6 .1

Exhaust ducts for Type 2 clothes dryers shall comply with 10.4.4.

10.4.5 6 .2

Exhaust ducts for Type 2 clothes dryers shall be constructed of sheet metal or other noncombustiblematerial. Such ducts shall be equivalent in strength and corrosion resistance to ducts made of galvanizedsheet steel not less than 0.0195 in. (0.5 mm) thick.

10.4.5 6 .3

Type 2 clothes dryers shall be equipped or installed with lint-controlling means.


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10.4.5.4

Exhaust ducts for unlisted Type 2 clothes dryers shall be installed with a minimum clearance of 6 in.(150 mm) from adjacent combustible material. Where exhaust ducts for Type 2 clothes dryers are installedwith reduced clearances, the adjacent combustible material shall be protected in accordance with Table10.2.3 .

10.4.5.5 6.5

Where ducts pass through walls, floors, or partitions, the space around the duct shall be sealed withnoncombustible material.

10.4.5 6 .6

Multiple installations of Type 2 clothes dryers shall be made in a manner to prevent adverse operation dueto back pressures that might be created in the exhaust systems.

10.4.6 7 Multiple-Family or Public Use.

All clothes dryers installed for multiple-family or public use shall be equipped with approved safety shutoffdevices and shall be installed as specified for a Type 2 clothes dryer under 10.4.5 6 .





Committee: NFG-AAA


Committee Statement

CommitteeStatement:



ResponseMessage:

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10.4.6 Multiple-Family or Public Use.

All clothes dryers installed for multiple-family or public use shall be equipped with approved safety shutoffdevices and shall be installed as specified for a Type 2 clothes dryer under 10.4.5.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The requirement that "approved safety shutoff devices" is not sufficiently clear to allow forconsistent enforcement. The minimum safety devices should be specified.

ResponseMessage:

FR-146-NFPA 54-2018



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10.6 Decorative Appliances for Installation in Vented Fireplaces.

10.6.1 Application

Decorative appliances for installation in vented fireplaces shall be listed in accordance with ANSIZ21.60/CSA 2.26, Decorative Gas Appliances for Installation in Solid-Fuel Burning Fireplaces .

10.6.2 * Prohibited Installations.

Decorative appliances for installation in vented fireplaces shall not be installed in bathrooms or bedroomsunless the appliance is listed and the bedroom or bathroom has the required volume in accordance with9.3.2.

10.6.2 3 Installation.

A decorative appliance for installation in a vented fireplace shall be installed only in a vented fireplacehaving a working chimney flue and constructed of noncombustible materials. These appliances shall not bethermostatically controlled.

10.6.2 3 .1

A listed decorative appliance for installation in a vented fireplace shall be installed in accordance with themanufacturer’s installation instructions.

10.6.2 3 .2

A decorative appliance for installation in a vented fireplace, where installed in a manufactured home, shallbe listed for installation in manufactured homes.

10.6.2.3

An unlisted decorative appliance for installation in a vented fireplace shall be installed in a fireplace havinga permanent free opening, based on appliance input rating and chimney height equal to or greater than thatspecified in Table 10.6.2.3 .

Table 10.6.2.3 Free Opening Area of Chimney Damper for Venting Flue Gases from Unlisted DecorativeAppliances for Installation in Vented Fireplaces

Minimum Permanent Free Opening (in. 2 )* Chimney Height

(ft) 8 13 20 29 39 51 64 Appliance Input Rating (Btu/hr) 6 7,800 14,000 23,200 34,000 46,400 62,400 80,000 8 8,400 15,200 25,200 37,000 50,400 68,000 86,000 10 9,000 16,800 27,600 40,400 55,800 74,400 96,400 15 9,800 18,200 30,200 44,600 62,400 84,000 108,800 20 10,600 20,200 32,600 50,400 68,400 94,000 122,200 30

For SI units, 1 ft = 0.305 m, 1 in. 2 = 645 mm 2 , 1000 Btu/hr = 0.293 kW.

* The first six minimum permanent free openings (8 in. 2 to 51 in. 2 ) correspond approximately to the

cross-sectional areas of chimneys having diameters of 3 in. through 8 in., respectively. The 64 in. 2

opening corresponds to the cross-sectional area of standard 8 in. × 8 in. chimney tile.

10.6.3 4 Fireplace Screens.

A fireplace screen shall be installed with a decorative appliance for installation in a vented fireplace.

Supplemental InformationFile Name Description Approved


Submitter Information VerificationCommittee: NFG-AAA



Committee Statement

CommitteeStatement:





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10.7 Gas Fireplaces, Vented.

10.7. 1 1 Application

Vented gas fireplaces shall be listed in accordance with ANSI Z21.50/CSA 2.22, Vented Decorative GasAppliances .


Vented gas fireplaces shall not be installed in bathrooms or bedrooms unless the appliance is listed andthe bedroom or bathroom has the required volume in accordance with 9.3.2.

Exception: Direct vent gas fireplaces.


The installation of vented gas fireplaces shall comply with the following requirements:

(1) Listed vented Vented gas fireplaces shall be installed in accordance with the manufacturer'sinstallation instructions and where installed in or attached to combustible material shall be specificallylisted for such installation.

(2) Unlisted vented gas fireplaces shall not be installed in or attached to combustible material and shallalso comply with the following:

(3) They shall have a clearance at the sides and rear of not less than 18 in. (460 mm).

(4) Combustible floors under unlisted vented gas fireplaces shall be protected in an approvedmanner.

(5) Unlisted appliances of other than the direct vent type shall be equipped with a draft hood andshall be properly vented in accordance with Chapter 12 .

(6) Appliances that use metal, asbestos, or ceramic material to direct radiation to the front of theappliance shall have a clearance of 36 in. (910 mm) in front and, if constructed with a doubleback of metal or ceramic, shall be installed with a minimum clearance of 18 in. (460 mm) at thesides and 12 in. (300 mm) at the rear.

(7) Panels, grilles, and access doors that are required to be removed for normal servicing operations shallnot be attached to the building.

(8) Direct vent gas fireplaces shall be installed with the vent air intake terminal in the outdoors and inaccordance with the manufacturer’s instructions.

10.7.3 4 Combustion and Circulating Air.

Combustion and circulating air shall be provided in accordance with Section 9.3.

Supplemental InformationFile Name Description Approved



Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision requires products to be listed to the applicable American National Standard by anorganization acceptable to the code official. If there is not an acceptable standard, the authority


ResponseMessage:

having jurisdiction has the option under 1.4, Equivalency, to allow unlisted products to be installed.


FR-78-NFPA 54-2018



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First Revision No. 147-NFPA 54-2018 [ Sections 10.8, 10.9 ]


10.8 Non-Recirculating Direct Gas-Fired Industrial Air Heaters Heating and Forced Ventilation Appliances. 10.8.1 Application.

Direct gas-fired industrial air heaters of the non-recirculating type heating and forced ventilation appliances for commercial and industrial applications shall be listed in accordance with the following standards as applicable: (1) ANSI Z83.4/CSA 3.7, Non-Recirculating Direct Gas-Fired Industrial Air HeatersHeating and Forced Ventilation Appliances for Commercial and Industrial Application. (2) ANSI Z83.18, Recirculating Direct Gas-Fired Heating and Forced Ventilation Appliances for Commercial and Industrial Application.

10.8.2 Prohibited Installations. 10.8.2.1

Non-recirculating direct Direct gas-fired industrial air heaters heating and forced ventilation appliances shall not serve any area containing sleeping quarters.

10.8.2.2

Non-recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances shall not recirculate room air. 10.8.2.3* Recirculating direct gas-fired heating and forced ventilation appliances shall not recirculate room air in buildings that contain flammable solids, liquids, or gases; explosive materials; or substances that can become toxic when exposed to flame or heat. A.10.8.2.3 Recirculation of room air can be hazardous in the presence of flammable solids, liquids, gases, explosive materials (e.g., grain dust, coal dust, gun powder), and substances (e.g., refrigerants, aerosols) that can become toxic when exposed to flame or heat.

10.8.3 Installation.

Installation of direct gas-fired industrial air heaters heating and forced ventilation appliances shall comply with 10.8.3.1 through 10.8.3.3.

10.8.3.1

Non-recirculating dDirect gas-fired industrial air heatersheating and forced ventilation appliances shall be installed in accordance with the manufacturer’s instructions.

10.8.3.2

Non-recirculating dDirect gas-fired industrial air heatersheating and forced ventilation appliances shall be permitted to provide fresh air ventilation.

10.8.3.3

Non-recirculating dDirect gas-fired industrial air heatersheating and forced ventilation appliances shall be provided with access for removal of burners; for replacement of motors, controls, filters, and other working parts; and for adjustment and lubrication of parts requiring maintenance.

10.8.4 Clearance from Combustible Materials.

Non-recirculating dDirect gas-fired industrial air heatersheating and forced ventilation appliances shall be installed with a clearance from combustible materials of not less than that shown on the rating plate and the manufacturer’s instructions.

10.8.5 Air Supply.

The air supply to direct gas-fired heating and forced ventilation appliances shall be in accordance with sections 10.8.5.1 through 10.8.5.3.

10.8.5.1 All air to the non-recirculating direct gas-fired industrial air heaterheating and forced ventilation appliance shall be ducted directly from outdoors.

10.8.5.2 Ventilation air to the recirculating direct gas-fired heating and forced ventilation appliance shall be ducted directly from outdoors. Air in excess of the minimum ventilation air specified on the heater's rating plate shall be taken from the building, ducted directly from outdoors, or a combination of both.

Commented [ML1]: This is moving from 10.9.2.2 and A.10.9.2.2

Commented [ML2]: Previously in 10.8.5

10.8.5.3 Where outdoor air dampers or closing louvers are used, they shall be verified to be in the open position prior to main burner operation.

10.8.6 Atmospheric Vents or Gas Reliefs or Bleeds.

Non-recirculating dDirect gas-fired industrial air heatersheating and forced ventilation appliances with valve train components equipped with atmospheric vents, gas reliefs, or bleeds shall have their vent lines, gas reliefs, or bleeds lead to a safe point outdoors. Means shall be employed on these lines to prevent water from entering and to prevent blockage from insects and foreign matter. An atmospheric vent line shall not be required to be provided on a valve train component equipped with a listed vent limiter.

10.8.7 Relief Openings.

The design of the installation shall include adequate provisions to permit the non-recirculating direct gas-fired industrial air heaterheating and forced ventilation appliances to operate at its their rated airflow without overpressurizing the space served by the heater by taking into account the structure’s designed infiltration rate, properly designed relief openings, or an interlocked powered exhaust system, or a combination of these methods.

Commented [ML3]: This was previously part of 10.8.5

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10.8.7.1

The structure’s designed infiltration rate and the size of relief opening(s) shall be determined by approved engineering methods.

10.8.7.2

Louver or counterbalanced gravity damper relief openings shall be permitted. Where motorized dampers or closable louvers are used, they shall be proved to be in their open position prior to main burner operation.

10.8.8 Purging.

Inlet ducting, when used, shall be purged with at least four air changes prior to an ignition attempt.

10.9 Recirculating Direct Gas-Fired Industrial Air Heaters. 10.9.1 Application.

Direct gas-fired industrial air heaters of the recirculating type shall be listed in accordance with ANSI Z83.18, Recirculating Direct Gas-Fired Industrial Air Heaters.

10.9.2 Prohibited Installations. 10.9.2.1

Recirculating direct gas-fired industrial air heaters shall not serve any area containing sleeping quarters.

10.9.2.2*

Recirculating direct gas-fired industrial air heaters shall not recirculate room air in buildings that contain flammable solids, liquids, or gases; explosive materials; or substances that can become toxic when exposed to flame or heat.


Recirculating direct gas–fired industrial air heaters shall be installed in accordance with the manufacturer’s instructions.


Recirculating direct gas-fired industrial air heaters shall be installed with a clearance from combustible materials of not less than that shown on the rating plate and the manufacturer’s instructions.

10.9.5 Air Supply.

Ventilation air to the recirculating direct gas-fired industrial air heater shall be ducted directly from outdoors. Air to the recirculating direct gas-fired industrial air heater in excess of the minimum ventilation air specified on the heater’s rating plate shall be taken from the building, ducted directly from outdoors, or a combination of both. Where outdoor air dampers or closing louvers are used, they shall be verified to be in the open position prior to main burner operation.

10.9.6 Atmospheric Vents, Gas Reliefs, or Bleeds.

Recirculating direct gas-fired industrial air heaters with valve train components equipped with atmospheric vents, gas reliefs, or bleeds shall have their vent lines, gas reliefs, or bleeds lead to a safe point outdoors. Means shall be employed on these lines to prevent water from entering and to prevent blockage from

insects and foreign matter. An atmospheric vent line shall not be required to be provided on a valve train component equipped with a listed vent limiter.


The design of the installation shall include adequate provisions to permit the recirculating direct gas-fired industrial air heater to operate at its rated airflow without overpressurizing the space served by the heater, by taking into account the structure’s designed infiltration rate, properly designed relief openings, an interlocked powered exhaust system, or a combination of these methods.

10.9.7.1

The structure’s designed infiltration rate and the size of relief opening(s) shall be determined by approved engineering methods.

10.9.7.2

Louver or counterbalanced gravity damper relief openings shall be permitted. Where motorized dampers or closable louvers are used, they shall be proved to be in their open position prior to main burner operation.

10.9.8 Purging.


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54_FR147_10.8_10.9.docx Staff use- correct tracked changes


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Sections 10.8 and 10.9 covering the 2 types of gas-fired industrial air heaters are repetitive, sothey have been combined to delete duplication. The titles for the appliances have been revised toreflect the name changes in the listing standards. Some requirements were revised to apply to bothtypes of appliances because they are applicable to both.

ResponseMessage:

FR-147-NFPA 54-2018






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ApprovedFile Name

54_FR88_10.10.docx

Description

Staff use- correct tracked changes shown


Committee: NFG-AAA


Committee Statement

CommitteeStatement:





10.10 Duct Furnaces. 10.10.1 Application Duct furnaces with inputs of 10 mBtu/hr or less shall be listed in accordance with ANSI Z83.8/CSA 2.6, Gas Unit Heaters, as Packaged Heaters, Gas Utility Heaters, and Gas-fired Duct Furnaces. 10.10.1 Clearances.

The installation of duct furnaces shall comply with the following clearance requirements:

(1) Listed duct furnaces shall be installed with clearances of at least 6 in. (150 mm) between adjacent walls, ceilings, and floors of combustible material and the furnace draft hood and shall comply with the following:

(a1) Duct Furnaces furnaces listed for installation at lesser clearances shall be installed in accordance with the manufacturer's installation instructions.

(b2) In no case shall the clearance be such as to interfere with combustion air and accessibility.

(2) Unlisted duct furnaces shall be installed with clearances to combustible material in accordance with the clearances specified for unlisted furnaces and boilers in Table 10.3.2.2. Combustible floors under unlisted duct furnaces shall be protected in an approved manner.

10.10.7 Installation in Commercial Garages and Aircraft Hangars.

Duct furnaces installed in garages for more than three motor vehicles or in aircraft hangars shall be of a listed type and shall be installed in accordance with 9.1.11 and 9.1.12.

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10.10.6.3

Where duct furnaces are to be located upstream from cooling units, the cooling unit shall be so designedor equipped as to not develop excessive temperatures or pressures.


Committee: NFG-AAA


Committee Statement

Committee Statement: The requirement is vague and leads to inconsistent enforcement.




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10.10.6.4 *Where a duct furnace is installed downstream of an evaporative cooler or air washer, the heat exchanger shall beconstructed of corrosion-resistant materials. Stainless steel, ceramic-coated steel, and an aluminum-coated steel in which the bond between the steel and the aluminum is an iron–aluminum alloyare considered to be corrosion resistant. Air washers operating with chilled water that deliver air below thedew point of the ambient air at the duct furnace shall be considered as refrigeration systems.A.10.10.6.4

Stainless steel, ceramic-coated steel, and an aluminum-coated steel in which the bond between the steel and thealuminum is an iron–aluminum alloy are considered to be corrosion resistant.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This sentence is advisory and doesn't contain a requirement, so it is being moved to theannex.



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10.11 Floor Furnaces. 10.11.1 Application Floor furnaces shall be listed in accordance with ANSI Z21.86/CSA 2.32, Vented Gas-fired Space Heating Appliances.


The installation of floor furnaces shall comply with the following requirements:

(1) Listed Ffloor furnaces shall be installed in accordance with the manufacturers' installation instructions.

(2) Unlisted floor furnaces shall not be installed in combustible floors.

(3) Thermostats controlling floor furnaces shall not be located in a room or space that can be separated from the room or space in which the register of the floor furnace is located.

10.11.2 Temperature Limit Controls. 10.11.2.1

Listed aAutomatically operated floor furnaces shall be equipped with temperature limit controls.

10.11.2.2

Unlisted automatically operated floor furnaces shall be equipped with a temperature limit control arranged to shut off the flow of gas to the burner in the event the temperature at the warm air outlet register exceeds 350°F (177°C) above room temperature.

10.11.11 Upper Floor Installations.

Listed fFloor furnaces shall be permitted to be installed in an upper floor, provided the furnace assembly projects below into a utility room, closet, garage, or similar nonhabitable space. In such installations, the floor furnace shall be enclosed completely (entirely separated from the nonhabitable space) with means for air intake to meet the provisions of Section 9.3, with access for servicing, minimum furnace clearances of 6 in. (150 mm) to all sides and bottom, and with the enclosure constructed of Portland cement plaster or metal lath or other noncombustible material.

10.11.12 First Floor Installation.

Listed fFloor furnaces installed in the first or ground floors of buildings shall not be required to be enclosed unless the basements of these buildings have been converted to apartments or sleeping quarters, in which case the floor furnace shall be enclosed as specified for upper floor installations and shall project into a nonhabitable space.


ApprovedFile Name

54_FR90_10.11.docx

Description



Committee: NFG-AAA


Committee Statement

CommitteeStatement:




Public Input No. 164-NFPA 54-2018 [Section No. 10.11]DRAFT - Sub

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10.12 Food Service Appliance, Floor-Mounted. 10.12.1 Application. Floor-mounted food service appliances shall be listed in accordance with ANSI Z83.11/CSA 1.8, Gas Food Service Equipment.

10.12.1 Clearance for Listed Appliances.

Listed fFloor-mounted food service appliances, such as ranges for hotels and restaurants, deep fat fryers, unit broilers, kettles, steam cookers, steam generators, and baking and roasting ovens, shall be installed at least 6 in. (150 mm) from combustible material except that at least a 2 in. (50 mm) clearance shall be maintained between a draft hood and combustible material. Floor-mounted food service appliances listed for installation at lesser clearances shall be installed in accordance with the manufacturer’s installation instructions. Appliances designed and marked “For use only in noncombustible locations” shall not be installed elsewhere.

10.12.2 Clearance for Unlisted Appliances.

Unlisted floor-mounted food service appliances shall be installed to provide a clearance to combustible material of not less than 18 in. (460 mm) from the sides and rear of the appliance and from the vent connector and not less than 48 in. (1.2 m) above cooking tops and at the front of the appliance. Clearances for unlisted appliances installed in partially enclosed areas such as alcoves shall not be reduced. Reduced clearances for unlisted appliances installed in rooms that are not partially enclosed shall be in accordance with Table 10.2.3.

10.12.3 Mounting on Combustible Floor. 10.12.3.1

Listed fFloor-mounted food service appliances that are listed specifically for installation on floors constructed of combustible material shall be permitted to be mounted on combustible floors in accordance with the manufacturer’s installation instructions.

10.12.4 Installation on Noncombustible Floor. 10.12.4.1

Listed fFloor-installed food service appliances that are designed and marked “For use only in noncombustible locations” shall be installed on floors of noncombustible construction with noncombustible

10.12.5 Combustible Material Adjacent to Cooking Top.

Listed and unlisted fFood service ranges shall be installed to provide clearance to combustible material of not less than 18 in. (460 mm) horizontally for a distance up to 2 ft (0.6 m) above the surface of the cooking top where the combustible material is not completely shielded by high shelving, warming closet, or other system. Reduced combustible material clearances are permitted where protected in accordance with Table 10.2.3.


ApprovedFile Name

54_FR91_10.12.docx

Description



Committee: NFG-AAA


Committee Statement

CommitteeStatement:




Public Input No. 165-NFPA 54-2018 [Section No. 10.12]DRAFT - Sub

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10.13 Food Service Appliances, Counter Appliances.

10.13.1 Application.

Food service counter appliances shall be listed in accordance with ANSI Z83.11/CSA 1.8, Gas FoodService Equipment .

10.13.2 Vertical Clearance.

A vertical distance of not less than 48 in. (1.2 m) shall be provided between the top of all food service hotplates and griddles and combustible material.

10.13.2 3 Clearance for Listed Appliances.

Listed food Food service counter appliances such as hot plates and griddles, food and dish warmers, andcoffee brewers and urns, where installed on combustible surfaces, shall be set on their own bases or legsand shall be installed with a minimum horizontal clearance of 6 in. (150 mm) from combustible material,except that at least a 2 in. (50 mm) clearance shall be maintained between a draft hood and combustiblematerial. Food service counter appliances listed for installation at lesser clearances shall be installed inaccordance with the manufacturer's installation instructions.


Unlisted food service hot plates and griddles shall be installed with a horizontal clearance from combustiblematerial of not less than 18 in. (460 mm). Unlisted gas food service counter appliances, including coffeebrewers and urns, waffle bakers, and hot water immersion sterilizers, shall be installed with a horizontalclearance from combustible material of not less than 12 in. (300 mm). Reduced clearances for gas foodservice counter appliances shall be in accordance with Table 10.2.3 . Unlisted food and dish warmers shallbe installed with a horizontal clearance from combustible material of not less than 6 in. (150 mm).

10.13.4 Installation of Unlisted Appliances.

Unlisted food service counter appliances shall not be set on combustible material unless they have legsthat provide not less than 4 in. (100 mm) of open space below the burners and the combustible surface is

protected with insulating millboard at least 1 ⁄ 4 in. (6 mm) thick covered with sheet metal not less than0.0122 in. (0.3 mm) thick, or with equivalent protection.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:



ResponseMessage:

FR-92-NFPA 54-2018



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10.13.2 Clearance for Listed Appliances.Listed food service counter appliancessuch as hot plates and griddles, food and dish warmers, and coffee

brewers and urns , where installed on combustible surfaces, shall be set on their own bases or legs and shallbe installed with a minimum horizontal clearance of 6 in. (150 mm) from combustible material,except that at least a 2 in. (50 mm) clearance shall be maintained between a draft hood andcombustible material. Food service counter appliances listed for installation at lesser clearancesshall be installed in accordance with the manufacturer's installation instructions.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The list of examples of food service counter appliances is deleted as a list is never complete. Therequirement that the appliances be set on their own bases or legs is deleted as this should be inthe manufacturer's instructions.

ResponseMessage:

FR-149-NFPA 54-2018



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10.14 Household Cooking Appliances.

10.14.1 * 1 Application.

Household cooking appliances shall be listed in accordance with ANSI Z21.1/CSA 1.1, HouseholdCooking Gas Appliances .


Listed floor Floor -mounted and built-in household cooking appliances shall be installed in accordance withthe manufacturer’s installation instructions.

10.14.2 3 Clearances.

The clearances specified as follows shall not interfere with combustion air, accessibility for operation, andservicing:

(1) Listed floor Floor -mounted household cooking appliances, where installed on combustible floors, shallbe set on their own bases or legs.

(2) Listed household cooking appliances with listed gas room heater sections shall be installed so that thewarm air discharge side shall have a minimum clearance of 18 in. (460 mm) from adjacentcombustible material. A minimum clearance of 36 in. (910 mm) shall be provided between the top ofthe heater section and the bottom of cabinets.

(3) Unlisted floor-mounted household cooking appliances shall be installed with at least a 6 in. (150 mm)clearance at the back and sides to combustible material. Combustible floors under unlisted appliancesshall be protected in an approved manner.

(4) Unlisted built-in household cooking appliances shall not be installed in, or adjacent to, unprotectedcombustible material.

10.14.2.1 * Vertical Clearance Above Cooking Top.

Household cooking appliances shall have a vertical clearance above the cooking top of not less than 30 in.(760 mm) to combustible material or metal cabinets. A minimum clearance of 24 in. (610 mm) is permittedwhen one of the following is installed:

(1) The underside of the combustible material or metal cabinet above the cooking top is protected with notless than 1⁄4 in. (6 mm) insulating millboard covered with sheet metal not less than 0.0122 in. (0.3 mm)thick.

(2) A metal ventilating hood of sheet metal not less than 0.0122 in. (0.3 mm) thick is installed above thecooking top with a clearance of not less than 1⁄4 in. (6 mm) between the hood and the underside of thecombustible material or metal cabinet, and the hood is at least as wide as the appliance and iscentered over the appliance.

(3) A listed cooking appliance or microwave oven is installed over a listed cooking appliance andconforms to the terms of the upper appliance’s manufacturer’s installation instructions.

10.14.3 Level Installation.

Cooking appliances shall be installed so that the cooking top, broiler pan, or oven racks are level.





Committee: NFG-AAA



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10.14.2

(2) Listed household cooking appliances with listed gas room heater sections shall be installed so that the warm airdischarge side shall have a minimum clearance of 18 in. (460 mm) from adjacent combustible material. A minimumclearance of 36 in. (910 mm) shall be provided between the top of the heater section and the bottom of cabinets.


Committee: NFG-AAA


Committee Statement

Committee Statement: No such products are currently being manufactured.




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Committee: NFG-AAA


Committee Statement

Committee Statement: This requirement is included in appliance manufacturer's installation instructions.




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10.15.2.2 Open-Flame Type.

Clearance shall comply with the following:

(1) Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustiblematerial not less than that specified inTable 10.15.2.2. The distance from ground level to the base ofthe burner shall be a minimum of 7 ft (2.1 m) where installed within 2 ft (0.6 m) of walkways. Lesserclearances shall be permitted to be used where acceptable to the authority having jurisdiction.

(2) Unlisted open-flame illuminating appliances installed outdoors shall be equipped with a limiting orificeor other limiting devices that maintain a flame height consistent with the clearance from combustiblematerial, as given in Table 10.15.2.2.

(3) Appliances designed for flame heights in excess of 30 in. (760 mm) shall be permitted to be installed ifacceptable to the authority having jurisdiction. approved.

(4) Such appliances shall be equipped with a safety shutoff device or automatic ignition.

(5) Unlisted Clearances to combustible material from unlisted open-flame illuminating appliancesinstalled indoors shall have clearances from combustible material acceptable to the authority havingjurisdiction shall be approved .

Table 10.15.2.2 Clearances for Unlisted Outdoor Open-Flame Illuminating Appliances

Flame Height

Above Burner

Head

(in.)

Minimum Clearance

from Combustible

Material

(ft)*

Horizontal Vertical

12 2 6

18 3 8

24 3 10

30 4 12

For SI units, 1 in. = 25.4 mm, 1 ft = 0.305 m.

*Measured from the nearest portion of the burner head.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Editorial revisions to use "approved" which is defined in the Code as being acceptable tothe AHJ.




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Infrared heaters having an input rating of 400,000 Btu/hr or less shall be listed in accordance with ANSI

Z83.19/CSA 2.35, Gas-fired High Intensity Infrared Heaters , or ANSI Z83.20/CSA 2.34, Gas-fired Tubular and

Low Intensity Infrared Heaters.

10.17.2 Support.

Suspended-type infrared heaters shall be fixed in position independent of gas and electric supply lines.Hangers and brackets shall be of noncombustible material. Heaters subject to vibration shall be providedwith vibration-isolating hangers.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision requires products having an input rating of 400,000 Btu/hr or less to be listed to theapplicable American National Standard by an organization acceptable to the code official. That inputrating is the upper limit of the available standard. If there is not an acceptable standard, theauthority having jurisdiction has the option under 1.4, Equivalency, to allow unlisted products to beinstalled.


ResponseMessage:

FR-152-NFPA 54-2018



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Overhead heaters installed in garages for more than three motor vehicles or in aircraft hangars shall be ofa be listed type and shall be installed in accordance with 9.1.11 and 9.1.12.


Committee: NFG-AAA


Committee Statement

Committee Statement: Editorial revision to remove unnecessary words.




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54_FR96_10.18.docx Staff use- tracked changes


Committee: NFG-AAA


Committee Statement

CommitteeStatement:



ResponseMessage:

FR-96-NFPA 54-2018



10.18 Open-Top Broiler Units. 10.18.1 Listed UnitsApplication.

Listed oOpen-top broiler units shall be listed in accordance with ANSI Z83.11/CSA 1.8, Gas Food Service Equipment or ANSI Z21.1/CSA 1.1, Household Cooking Gas Appliances, and installed in accordance with the manufacturer's installation instructions.

10.18.2 Unlisted Units.

Unlisted open-top broiler units shall be installed in accordance with the manufacturers’ instructions but shall not be installed in combustible material.

10.18.3 Protection Above Domestic Units.

Domestic open-top broiler units shall be provided with a metal ventilating hood not less than 0.0122 in. (0.3 mm) thick with a clearance of not less than 1⁄4 in. (6 mm) between the hood and the underside of combustible material or metal cabinets. A clearance of at least 24 in. (610 mm) shall be maintained between the cooking top and the combustible material or metal cabinet, and the hood shall be at least as wide as the open-top broiler unit and centered over the unit. Listed dDomestic open-top broiler units incorporating an integral exhaust system and listed for use without a ventilating hood shall not be required to be provided with a ventilating hood if installed in accordance with 10.14.2.1(1).

10.18.4 Commercial Units.

Commercial open-top broiler units shall be provided with ventilation in accordance with NFPA 96.

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Committee: NFG-AAA


Committee Statement

CommitteeStatement:



ResponseMessage:

FR-97-NFPA 54-2018




10.19 Outdoor Cooking Appliances. 10.19.1 Listed Units.

Listed oOutdoor cooking appliances shall be listed in accordance with ANSI Z83.11/CSA 1.8, Gas Food Service Equipment, ANSI Z21.58/CSA 1.6, Outdoor Cooking Gas Appliances , or ANSI Z21.89/CSA 1.18, Outdoor Cooking Specialty Gas Appliances, and installed in accordance with the manufacturer's installation instructions.


Unlisted outdoor cooking appliances shall be installed outdoors with clearances to combustible material of not less than 36 in. (910 mm) at the sides and back and not less than 48 in. (1220 mm) at the front. In no case shall the appliance be located under overhead combustible construction.

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54_FR_98_10.20.docx Staff use- tracked changes


Committee: NFG-AAA


Committee Statement

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ResponseMessage:

FR-98-NFPA 54-2018



10.20 Pool Heaters. 10.20.1 Application. Pool heaters shall be listed in accordance with ANSI Z21.56/CSA 4.7, Gas-fired Pool Heaters.

10.20.1 Location.

A pool heater shall be located or protected so as to minimize accidental contact of hot surfaces by persons.

10.20.2 Clearance.

The installation of pool heaters shall meet the following requirements:

(1) In no case shall tThe clearances shall be such as to not interfere with combustion air, draft hood or vent terminal clearance and relief, and accessibility for servicing.

(2) A listed pool heater shall be installed in accordance with the manufacturer’s installation instructions.

(3) An unlisted pool heater shall be installed with a minimum clearance of 12 in. (300 mm) on all sides and the rear. A combustible floor under an unlisted pool heater shall be protected in an approved manner.

10.20.3 Temperature or Pressure Limiting Devices. 10.20.3.1

An unlisted pool heater shall be provided with overtemperature protection or overtemperature and overpressure protection by means of an approved device(s).

10.20.3.2

Where a pool heater is provided with overtemperature protection only and is installed with any device in the discharge line of the heater that can restrict the flow of water from the heater to the pool (such as a check valve, shutoff valve, therapeutic pool valving, or flow nozzles), a pressure relief valve shall be installed either in the heater or between the heater and the restrictive device.

10.20.4 Bypass Valves.

Where an integral bypass system is not provided as a part of the pool heater, a bypass line and valve shall be installed between the inlet and outlet piping for use in adjusting the flow of water through the heater.

10.20.5 Venting.

A pool heater listed for outdoor installation shall be installed with the venting means supplied by the manufacturer and in accordance with the manufacturer’s instructions.

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10.21 Refrigerators.


Refrigerators shall be listed in accordance with ANSI Z21.19/CSA 1.4, Refrigerators Using Gas Fuel .

10.21.2 Clearance.

Refrigerators shall be provided with clearances for ventilation at the top and back in accordance with themanufacturers’ instructions. Where such instructions are not available, at least 2 in. (50 mm) shall beprovided between the back of the refrigerator and the wall and at least 12 in. (300 mm) above the top.

10.21.2 Venting or Ventilating Kits Approved for Use with a Refrigerator.

Where an accessory kit is used for conveying air for burner combustion or unit cooling to the refrigeratorfrom areas outside the room in which it is located, or for conveying combustion products diluted with aircontaining waste heat from the refrigerator to areas outside the room in which it is located, the kit shall beinstalled in accordance with the refrigerator manufacturer’s instructions.





Committee: NFG-AAA


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CommitteeStatement:



ResponseMessage:

FR-99-NFPA 54-2018



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54_FR154_10.22.docx Staff Use- tracked changes


Committee: NFG-AAA


10.22 Room Heaters. 10.22.1 Application. Room heaters shall be listed in accordance with 10.22.1.1 or 10.22.1.2. 10.22.1.1 Vented Room Heaters. Vented room heaters shall be listed in accordance with ANSI Z21.86/CSA 2.32, Vented Gas-fired Space Heating Appliances, or ANSI Z21.88/CSA 2.33, Vented Gas Fireplace Heaters. 10.22.1.2 Unvented Room Heaters. Unvented room heaters shall be listed in accordance with ANSI Z21.11.2, Gas-Fired Room Heaters—Volume II, Unvented Room Heaters.

10.22.12* Prohibited Installations.

Unvented room heaters shall not be installed in bathrooms or bedrooms.

Exception No. 1: Where approved by the authority having jurisdiction, one listed wall-mounted, unvented room heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installed in a bathroom, provided that the input rating does not exceed 6000 Btu/hr (1760 W/hr) and combustion and ventilation air is provided as specified in 10.1.2. Exception No. 2: Where approved by the authority having jurisdiction, one listed wall-mounted unvented room heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installed in a bedroom, provided that the input rating does not exceed 10,000 Btu/hr (2930 W/hr) and combustion and ventilation air is provided as specified in 10.1.2. 10.22.2 Listing and Installation.

Unvented room heaters shall be listed in accordance with ANSI Z21.11.2,Gas-Fired Room Heaters — Volume II, Unvented Room Heaters, and shall be installed in accordance with the manufacturer's installation instructions.

10.22.3 Prohibited Installations in Institutions.

Room heaters shall not be installed in the following occupancies:

(1) Residential board and care

(2) Health care

10.22.4 Clearance.

A room heater shall be placed so as not to cause a hazard to walls, floors, curtains, furniture, doors when open, and so on, and to the free movements of persons within the room. Heaters designed and marked “For use in noncombustible fireplace only” shall not be installed elsewhere. Listed room heaters shall be installed in accordance with the manufacturer's installation instructions. In no case shall the clearances be such as to interfere with combustion air and accessibility. Unlisted room heaters shall be installed with clearances from combustible material not less than the following:

(1) Circulating Type. Room heaters having an outer jacket surrounding the combustion chamber, arranged with openings at top and bottom so that air circulates between the inner and outer jacket, and without openings in the outer jacket to permit direct radiation, shall have clearance at sides and rear of not less than 12 in. (300 mm).

(2) Radiating Type. Room heaters other than those of the circulating type described in10.22.4(1) shall have clearance at sides and rear of not less than 18 in. (460 mm), except that heaters that make use of metal, asbestos, or ceramic material to direct radiation to the front of the heater shall have a clearance of 36 in. (910 mm) in front and, if constructed with a double back of metal or ceramic, shall be permitted to be installed with a clearance of 18 in. (460 mm) at sides and 12 in. (300 mm) at rear. Combustible floors under unlisted room heaters shall be protected in an approved manner.

10.22.5 Wall-Type Room Heaters.

Wall-type room heaters shall not be installed in or attached to walls of combustible material unless listed for such installation.

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Committee Statement

CommitteeStatement:



In addition, "by the authority having jurisdiction" was removed because "approved" is defined inChapter 3 to already include that. Other requirements were removed that are included in the listingstandards.

ResponseMessage:

FR-154-NFPA 54-2018



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Committee: NFG-AAA


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CommitteeStatement:



ResponseMessage:

FR-100-NFPA 54-2018



10.25 Unit Heaters. 10.25.1 Application. Unit heaters shall be listed in accordance with ANSI Z83.8/CSA 2.6, Gas Unit Heaters, Gas PAckaged Heaters, Gas Utility Heaters, and Gas-fired Duct Furnaces, and installed in accordance with the manufacturer's installation instructions.

10.25.1 Support.

Suspended-type unit heaters shall be safely and adequately supported, with due consideration given to their weight and vibration characteristics. Hangers and brackets shall be of noncombustible material.

10.25.2 Clearance. 10.25.2.1 Suspended-Type Unit Heaters.

Suspended-type unit heaters shall meet the following requirements:

(1) A listed uUnit heaters shall be installed with clearances from combustible material of not less than 18 in. (460 mm) at the sides, 12 in. (300 mm) at the bottom, and 6 in. (150 mm) above the top where the unit heater has an internal draft hood, or 1 in. (25 mm) above the top of the sloping side of a vertical draft hood. A unit heater listed for reduced clearances shall be installed in accordance with the manufacturer’s installation instructions.

(2) Unlisted unit heaters shall be installed with clearances to combustible material of not less than 18 in. (460 mm).

(3) Clearances for servicing shall be in accordance with the manufacturers’ recommendations contained in the installation instructions.

10.25.3 Combustion and Circulating Air.


10.25.4 Ductwork.

A unit heater shall not be attached to a warm air duct system unless listed and marked for such installation.


Unit heaters installed in garages for more than three motor vehicles or in aircraft hangars shall be of a listed type and shall be installed in accordance with 9.1.11 and 9.1.12.

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10.26 Wall Furnaces.


Wall furnaces shall be listed in accordance with ANSI Z21.86/CSA 2.32, Vented Gas-fired Space HeatingAppliances .


10.26.1 2 .1

Listed wall Wall furnaces shall be installed in accordance with the manufacturer's installation instructions.Wall furnaces installed in or attached to combustible material shall be listed for such installation.

10.26. 1 2 .2

Unlisted wall furnaces shall not be installed in or attached to combustible material.

10.26.1.3

Vented wall furnaces connected to a Type B-W gas vent system listed only for a single story shall beinstalled only in single-story buildings or the top story of multistory buildings. Vented wall furnacesconnected to a Type B-W gas vent system listed for installation in multistory buildings shall be permitted tobe installed in single-story or multistory buildings. Type B-W gas vents shall be attached directly to a solidheader plate that serves as a firestop at that point and that shall be permitted to be an integral part of thevented wall furnace, as illustrated in Figure 10.26.1.3. The stud space in which the vented wall furnace isinstalled shall be ventilated at the first ceiling level by installation of the ceiling plate spacers furnished withthe gas vent. Firestop spacers shall be installed at each subsequent ceiling or floor level penetrated by thevent.

Figure 10.26.1 2 .3 Installation 2 Installation of Type B-W Gas Vents for Vented Wall Furnaces.

10.26.1 2 .4 3

Direct vent wall furnaces shall be installed with the vent air intake terminal in the outdoors. The thickness ofthe walls on which the furnace is mounted shall be within the range of wall thickness marked on the furnaceand covered in the manufacturers’ installation instructions.


10.26.1 2 .5 4

Panels, grilles, and access doors that are required to be removed for normal servicing operations shall notbe attached to the building. (For additional information on the venting of wall furnaces, see Chapter 12.)

10.26.2 3 Location.

Wall furnaces shall be located so as not to cause a hazard to walls, floors, curtains, furniture, or doors. Wallfurnaces installed between bathrooms and adjoining rooms shall not circulate air from bathrooms to otherparts of the building.




Description ApprovedFile Name



Committee: NFG-AAA


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10.26.1.4

Direct vent wall furnaces shall be installed with the vent combustion air intake terminal in the outdoors.The thickness of the walls on which the furnace is mounted shall be within the range of wall thicknessmarked on the furnace and covered in the manufacturers’ installation instructions.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

1. An editorial change has been made in the first sentence. 2. Installation in accordance with themanufacturer's installation instructions is required in 10.1.1 for all appliances. It does not need tobe repeated here.

ResponseMessage:

FR-121-NFPA 54-2018



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10.27 Water Heaters.


Water heaters shall be listed in accordance with ANSI Z21.10.1/CSA 4.1, Gas Water Heaters, Volume I,Storage Water Haters with Input Ratings of 75,000 Btu per Hour or Less , or ANSI Z21.10.3/CSA 4.3, GasWater Heaters, Volume III, Storage Water Haters with Input Ratings Above 75,000 Btu per Hour,Circulating or Instantaneous , and shall be installed in accordance with the manufacturer's installationinstructions.

10.27.2 Location.

Water heater installations in bedrooms and bathrooms shall comply with one of the following:

(1) Water heater shall be installed in a closet equipped with a weather-stripped door with no openings andwith a self-closing device. All combustion air shall be obtained from the outdoors in accordance with9.3.3.

(2) Water heater shall be of the direct vent type.

10.27.1 2 .1 Locations with Airhandlers.

Where a draft hood–equipped water heater is installed in a space containing a furnace or other air handler,the ducts serving the furnace or air handler shall comply with 10.3.7.4.

10.27.2 3 Clearance.

10.27.2 3 .1

The clearances shall not be such as to interfere with combustion air, draft hood clearance and relief, andaccessibility for servicing. Listed water heaters shall be installed in accordance with the manufacturer'sinstallation instructions.

10.27. 2.2

Unlisted water heaters shall be installed with a clearance of 12 in. (300 mm) on all sides and rear.Combustible floors under unlisted water heaters shall be protected in an approved manner.

10.27.3 Pressure Limiting 4 Pressure Relief Devices.

A water heater installation shall be provided with overpressure protection by means of an approved, listeddevice a device listed in accordance with ANSI Z21.22/CSA 4.4, Relief Valves for Hot Water SupplySystems , and installed in accordance with the manufacturer’s installation instructions. The pressure settingof the device shall exceed the water service pressure and shall not exceed the maximum pressure rating ofthe water heater.

10.27.4 5 Temperature Limiting Devices.

A water heater installation or a hot water storage vessel installation shall be provided with overtemperatureprotection by means of an approved, listed device installed in accordance with the manufacturer'sinstallation instructions.

10.27.5 6 Temperature, Pressure, and Vacuum Relief Devices.

Temperature, pressure, and vacuum relief devices or combinations thereof, and automatic gas shutoffdevices, shall be installed in accordance with the manufacturer's installation instructions. A shutoff valveshall not be placed between the relief valve and the water heater or on discharge pipes between suchvalves and the atmosphere. The hourly Btu discharge capacity or the rated steam relief capacity of thedevice shall not be less than the input rating of the water heater.

10.27.6 7 Automatic Instantaneous Type: Cold Water Supply.

The water supply to an automatic instantaneous water heater that is equipped with a water flow–actuatedcontrol shall be such as to provide sufficient pressure to properly operate the control when water is drawnfrom the highest faucet served by the heater.

10.27.7 8 * Antisiphon Devices.

Means acceptable to the authority having jurisdiction shall be provided to prevent siphoning in any waterheater or any tank to which a circulating water heater that incorporates a cold water inlet tube is attached.






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Committee: NFG-AAA


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ResponseMessage:

FR-102-NFPA 54-2018



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10.27.1.1 10.1.3 Locations with Air-handlers.Where a draft hood–equipped water heater appliance is installed in a space containing a furnace or other airhandler, the ducts serving the furnace or air handler shall comply with 10.3.7.4.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This requirement was intended to apply to all draft hood-equipped appliances, not justwater heaters.



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10.28 Compressed Natural Gas (CNG) Vehicular Fuel Systems.

The installation of compressed natural gas (CNG) fueling (dispensing) systems shall conform to be inaccordance with NFPA 52. Residential CNG fueling appliances shall be listed in accordance withANSI/CSA NGV 5.1, Residential Fueling Appliances, and installed in accordance to the appliancemanufacturer's installation instructions. Non-residential CNG fueling appliances shall be listed inaccordance with ANSI/CSA NGV 5.2, Vehicle Fueling Appliances (VFA) , and installed in accordance tothe appliance manufacturer’s installation instructions.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

ANSI/CSA NGV 5.2, first edition, was published in 2017 for coverage of non-residential CNG fuelingappliances. ANSI/CSA NGV 5.2-listed appliances differ from NGV 5.1 residential appliances inallowable maximum gas input flow rates, allowance for connection to external storage, and otherdesign and performance requirements that applicable to commercial applications and installationlocations and that are fully consistent with risk assessment study criteria used in development ofNGV 5.1. Like NGV 5.1 appliances, NGV 5.2 appliances only serve as slow-fill refueling systems. Allother “refueling systems” that are not ‘appliances’ are covered by NFPA 52 requirements.

ResponseMessage:

FR-122-NFPA 54-2018



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10.30 Fuel Cell Power Plants.

Fuel cell power plants with a power output of less than 50 kW shall be listed in accordance with ANSI/CSAFC 1, Fuel Cell Technologies - Part 3-100: Stationary Fuel Cell Power Systems - Safety , and installed inaccordance with the manufacturer’s instructions. Fuel cell power plants with a power output of greater than50 kW shall be installed in accordance with NFPA 853.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:



ResponseMessage:

FR-103-NFPA 54-2018



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First Revision No. 155-NFPA 54-2018 [ New Section after 10.31 ]

10.32 Outdoor Infrared Heaters.


Outdoor infrared heaters for residential and commercial applications shall be listed in accordance withANSI Z83.26/CSA 2.27, Gas-fired Outdoor Infrared Patio Heaters , and shall be installed in accordancewith the manufacturer's installation instructions.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The proposal is intended to allow for the installation of outdoor infrared heaters in accordancewith the standard (ANSI Z83.26/CSA 2.27) in both residential and commercial applications.

ResponseMessage:

FR-155-NFPA 54-2018



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Committee: NFG-AAA


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ResponseMessage:

FR-104-NFPA 54-2018




10.31 Outdoor Open Flame Decorative Appliances.

Permanently fixed in place outdoor open flame decorative appliances shall be installed in accordance with 10.31.1 through 10.31.3.

10.31.1 Listed UnitsApplication.

Listed oOutdoor open flame decorative appliances shall be listed in accordance with ANSI Z21.97/CSA 2.41, Outdoor Open Flame Decorative Gas Appliances, and shall be installed in accordance with the manufacturer’s installation instructions.


Unlisted outdoor open flame decorative appliances shall be installed outdoors in accordance with the manufacturer’s installation instructions and with clearances to combustible material of not less than 36 in. (910 mm) from the sides. In no case shall the appliance be located under overhead combustible construction.

10.31.3 Connection to Piping System.

The connection to the gas piping system shall be in accordance with 9.6.1(1), (2), (4), or (5).

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11.3 Safety Shutoff Devices.

Where a safety shutoff device is provided, it shall be checked for proper operation and adjustment inaccordance with the appliance manufacturer’s instructions. Where the device does not function properly tonot turn off the gas supply in the event of pilot outage or other improper operation, it ignition malfunction,the device shall be properly serviced or replaced with a new device.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

"Properly" has been deleted in 2 locations as it an unenforceable which is discouraged by theNFPA Manual of Style, par.2.2.2.3. Other revisions were made for clarification.

ResponseMessage:

FR-123-NFPA 54-2018



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Listed chimneys and vents shall be installed in accordance with Chapter 12 and the manufacturers'installation instructions.


Committee: NFG-AAA


Committee Statement

Committee Statement: Chimneys are added to make the requirements applicable to all listed venting materials.




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12.3.5 Direct Vent Appliances.

12.3.5.1 Listed direct vent appliances shall be installed in accordance with the manufacturer's installationinstructions and 12.9.3 .

12.3.5.2 Through-the-wall vent terminations for listed direct vent appliances shall be in accordance with12.9.1 .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This requirement was added to allow other than through the wall termination for direct ventappliances.



Public Input No. 118-NFPA 54-2018 [Sections 12.3.5, 12.3.6]


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12.3.6 Appliances with Integral Vents.

Appliances incorporating integral venting means shall be installed in accordance with the manufacturer'sinstallation instructions and with 12.9.1 and 12 . 9.2.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Chapter 10 requires installation in accordance with the manufacturers' instructions. There is noneed to repeat that here. Section 12.9.1 now incorporates the requirements that were in 12.9.2.

ResponseMessage:

FR-160-NFPA 54-2018



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12.3.7 Incinerators, Commercial-Industrial .

Commercial-industrial-type incinerators Incinerators shall be vented in accordance with NFPA 82.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Commercial and industrial are not defined in this code. Additionally, coverage for residentialincinerators was previously removed from the code.

ResponseMessage:

FR-129-NFPA 54-2018


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12.4.3.6

The exit terminals of mechanical draft systems shall be not less than 7 ft (2.1 m) above finished groundlevel where located adjacent to public walkways and shall be located as specified in 12.9.1 and 12.9.2 .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This coordinates with the revision in 12.9. The deleted requirement is included in the newTable 12.9.1 and Figure 12.9.1.

ResponseMessage:

FR-157-NFPA 54-2018



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12.4.4.1

Where automatically operated appliances, other than commercial cooking food service appliances, arevented through a ventilating hood or exhaust system equipped with a damper or with a power means ofexhaust, provisions shall be made to allow the flow of gas to the main burners only when the damper isopen to a position to properly vent the appliance and when the power means of exhaust is in operation.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Food service appliance is a term used elsewhere in the code and commercial cookingappliance is not defined in the Code.

ResponseMessage:

FR-40-NFPA 54-2018



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12.6.1.1

Factory-built chimneys shall be listed in accordance with ANSI/UL 103, Chimneys, Factory-Built,Residential Type and Building Heating Appliances; ANSI/UL 959, Medium Heat Appliance Factory-BuiltChimneys; or ANSI/UL 2561, 1400 Degree Fahrenheit Factory-Built Chimneys. Factory-built chimneysshall be installed in accordance with the manufacturer's installation instructions. Factory-built chimneysused to vent appliances that operate at positive vent pressure shall be listed for such application.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

As factory built chimneys are required to be listed, there is no need to restate here that theymust be installed in accordance with the manufacturer's installation instructions, which is coveredin 12.2.1.

ResponseMessage:

FR-41-NFPA 54-2018



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12.6.3.1

The effective area of a chimney venting system serving listed appliances with draft hoods, Category Iappliances, and other appliances listed for use with Type B vents shall be in accordance with one of thefollowing methods:

(1) Those listed in Chapter 13.

(2) For sizing an individual chimney venting system for The effective areas of the vent connector andchimney flue of a venting system serving a single appliance with a draft hood , the effective areas ofthe vent connector and chimney flue shall be not less than the area of the appliance flue collar or drafthood outlet or greater than seven times the draft hood outlet area.

(3) For sizing a chimney venting system connected to The effective area of the chimney flue of a ventingsystem serving two appliances with draft hoods , the effective area of the chimney flue shall be notless than the area of the larger draft hood outlet plus 50 percent of the area of the smaller draft hoodoutlet or greater than seven times the smaller draft hood outlet area.

(4) Chimney venting systems using mechanical draft shall be sized in accordance with approvedengineering methods.

(5) Other approved engineering methods.


Committee: NFG-AAA


Committee Statement

Committee Statement: This section is revised for clarity.




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12.6.4.

2 2 Chimneys shall be lined in accordance with

NFPA 211.

Exception: Existing chimneys shall be permitted to have their use continued when an appliance is replacedby an appliance of similar type, input rating, and efficiency, where the chimney complies with 12.6.4 andthe sizing of the chimney is in accordance with 12.6.3 .

NFPA 211.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The exception is removed because it conflicts with 12.6.1.3. The efficiency of appliances haschanged significantly so that this exception can no longer apply.

ResponseMessage:

FR-50-NFPA 54-2018


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12.6.9 Insulation Shield.

Where a factory-built chimney passes through insulated assemblies, an insulation shield constructed ofsteel having a minimum thickness of 0.0187 in. (0.4712 mm) (nominal 26 gage) shall be installed to provideclearance between the chimney and the insulation material. The clearance shall not be less than theclearance to combustibles specified by the chimney manufacturer's installation instructions. Wherechimneys pass through attic space, the shield shall terminate not less than 2 in. (51 mm) above theinsulation materials and shall be secured in place to prevent displacement. Insulation shields provided aspart of a listed chimney system shall be installed in accordance with the manufacturer's installationinstructions.


Committee: NFG-AAA


Committee Statement

Committee Statement: The last sentence duplicates the requirement in 12.2.1.




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12.7.5.1

A Where a common vent shall be permitted is installed in a multistory installations installation to ventCategory I appliances located on more than one floor level, provided the venting system is shall bedesigned and installed in accordance with approved engineering methods. For the purpose of this section,crawl spaces, basements, and attics shall be considered floor levels.


Committee: NFG-AAA


Committee Statement

Committee Statement: The first sentence is revised to be a mandatory requirement.




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First Revision No. 156-NFPA 54-2018 [ Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4 ]

Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4 [SEE WORD FILE]



54_FR156_12.9.1-12.9.4.docx Staff use- correct tracked changes, figure, table


Committee: NFG-AAA


Committee Statement


CommitteeStatement:

This revision coordinates the figure with clearances contained in the ANSI product standards. Inaddition, the clearances to vent terminals is expanded to cover commonly encountered installationsituations such as inside corners, locations under decks and balconies, regulator vents, soffits, etc.The condensate drain requirement is being relocated to section 12.10 (see First Revision).


Public Input No. 115-NFPA 54-2018 [Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4]

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12.9.1 A mechanical draft venting system shall terminate at least 3 ft (0.9 m) above any forced air inlet located within 10 ft (3 m). Exception No. 1: This provision shall not apply to the combustion air intake of a direct vent appliance. Exception No. 2: This provision shall not apply to the separation of the integral outdoor air inlet and flue gas discharge of listed outdoor appliances. 12.9.2 A mechanical draft venting system of other than direct vent type shall terminate at least 4 ft (1.2 m) below, 4 ft (1.2 m) horizontally from, or 1 ft (300 mm) above any door, operable window, or gravity air inlet into any building. The bottom of the vent terminal shall be located at least 12 in. (300 mm) above finished ground level. 12.9.3 The clearances for through-the-wall direct vent and non-direct vent terminals shall be in accordance with Table 12.9.31 and Figure 12.9.1. The bottom of the vent terminal and the air intake shall be located not less than 12 in. (300 mm) above finished ground level. Exception: The clearances in Table 12.9.1 shall not apply to the combustion air intake of a direct vent appliance. Table 12.9.3 Through-the-Wall Direct Vent Termination Clearances. Direct Vent Appliance .

Input Rating: Through the Wall Vent Terminal Clearance from any Air Opening into a Building:

10,000 Btu/hr (3kW) and less 6 in. (150 mm) Greater than 10,000 Btu/hr (3kW) and not exceeding 50,000 Btu/hr (14.7kW)

9 in. (230 mm)

Greater than 50,000 Btu/hr (14.7kW) and not exceeding 150,000 Btu/hr (29.4kW)

12 in. (300 mm)

> 150,000 Btu/hr (29.4kW) In accordance with the appliance manufacturer’s instructions and in no case less than the clearances specified in 12.9.2

12.9.4 Through-the-wall vents for Category II and Category IV appliances and noncategorized condensing appliances shall not terminate over public walkways or over an area where condensate or vapor could create a nuisance or hazard or could be detrimental to the operation of regulators, relief valves, or other equipment. Where local experience indicates that condensate is a problem with Category I and Category III appliances, this provision shall also apply. Drains for condensate shall be installed in accordance with the appliance and vent manufacturers' installation instructions.

Table 12.9.1 Though the Wall Vent Terminal Clearances

Figure Clearance

Clearance Location Minimum clearances for Direct- Vent Terminals

Minimum clearances for Non-Direct Vent Terminals

A Clearance above finished grade level, veranda, porch, deck, or balcony

12 inches

B Clearance to window or door that is openable

6 inches Appliances ≤ 10,000 Btu/hr 4 feet below or to side of opening or 1 foot above

opening 9 inches Appliances > 10,000 Btu/hr ≤ 50,000 Btu/hr,

12 inches Appliances > 50,000 Btu/hr ≤ 150,000 Btu/hr

Appliances > 150,000 Btu/hr, in accordance with the appliance manufacturer’s instructions and not less

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than the clearances specified for Non-Direct Vent Terminals in row B

C Clearance to non-openable window None unless otherwise specified by the appliance manufacturer

D Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal

None unless otherwise specified by the appliance manufacturer

E Clearance to unventilated soffit None unless otherwise specified by the appliance manufacturer

F Clearance to outside corner of building None unless otherwise specified by the appliance manufacturer

G Clearance to inside corner of building None unless otherwise specified by the appliance manufacturer

H Clearance to each side of center line extended above regulator vent outlet

3 feet up to a height of 15 feet above the regulator vent outlet

I Clearance to service regulator vent outlet in all directions

3 feet for gas pressures up to 2 psi 10 feet for gas pressures above 2 psi

J Clearance to non-mechanical air supply inlet to building and the combustion air inlet to any other appliance

Same clearance as specified for row B

K Clearance to a mechanical air supply inlet 10 feet horizontally from inlet or 3 feet above inlet

L Clearance above paved sidewalk or paved driveway located on public property or other areas where condensate or vapor can cause a nuisance or hazard

7 feet and not located above public walkways or other areas where condensate or vapor can cause a nuisance or hazard

M Clearance to underside of veranda, porch deck, or balcony

12 inches where the area beneath the veranda, porch deck or balcony is open on not less than two sides. The vent terminal is prohibited in this

location where only one side is open.

For SI units, 1 in. = 25.4 mm, 1 ft. = .3 m, 1 Btu/hr = 0.293 W

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Figure 12.9.1 Through the Wall Vent Terminal Clearances

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12.10 Condensation Drain.

12.10.1

Provision shall be made to collect and dispose of condensate from venting systems serving Category II andCategory IV appliances and noncategorized condensing appliances in accordance with 12 . 9.4.

12.10.2

Where local experience indicates that condensation is a problem, provision shall be made to drain off anddispose of condensate from venting systems serving Category I and Category III appliances in accordancewith 12.9.4 . Drains for condensate shall be installed in accordance with the appliance and ventmanufacturers' installation instructions.





Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This revision coordinates with the revision to section 12.9. The references in 12.10.1 and 12.10.2are no longer needed. The revised 12.9 also adds into the new table 12.9.1 the nuisance or hazardconsideration and therefore section 12.10.2 is no longer needed. The requirement that drains be inaccordance with the manufacturer's instructions is currently in 12.9.4 and is relocated to the moreappropriate section 12.10.

ResponseMessage:

FR-158-NFPA 54-2018



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12.11.2.5

Vent connectors for medium-heat appliances shall be constructed of factory-built, medium-heat chimneysections or steel of a thickness not less than that specified in Table 12.11.2.5 and shall comply with thefollowing:

(1) A steel vent connector for an appliance with a vent gas temperature in excess of 1000°F (538°C)measured at the entrance to the connector shall be lined with medium-duty fire brick or the equivalent.

(2) The lining shall be at least 21⁄2 in. (64 mm) thick for a vent connector having a diameter or greatestcross-sectional dimension of 18 in. (460 mm) or less.

(3) The lining shall be at least 41⁄2 in. (110 mm) thick laid on the 41⁄2 in. (110 mm) bed for a vent connectorhaving a diameter or greatest cross-sectional dimension greater than 18 in. (460 mm).

(4) Where Factory-built chimney sections , if employed, are installed they shall be joined together inaccordance with the chimney manufacturer’s instructions.

Table 12.11.2.5 Minimum Thickness for Steel Vent Connectors for Medium-Heat Appliances

Vent Connector SizeMinimum Thickness

(in.)

Diameter

(in.)

Area

(in.2)

Up to 14 Up to 154 0.053

Over 14 to 16 154 to 201 0.067

Over 16 to 18 201 to 254 0.093

Over 18 Larger than 254 0.123

For SI units, 1 in. = 25.4 mm, 1 in.2 = 645 mm2.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Editorial revision. Factory built chimney sections are used as vent connectors, they areinstalled and not employed.

ResponseMessage:

FR-44-NFPA 54-2018



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12.11.3.2

For Where a single appliance having more than one draft hood outlet or flue collar is installed , themanifold shall be constructed according to the instructions of the appliance manufacturer. Where there areno instructions, the manifold shall be designed and constructed in accordance with approved engineeringpractices. As an alternative method, the effective area of the manifold shall equal the combined area of theflue collars or draft hood outlets, and the vent connectors shall have a minimum 1 ft (0.3 m) rise.


Committee: NFG-AAA


Committee Statement

Committee Statement: Editorial revision to provide clarity.




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12.11.7 Connector Junctions.

Where vent connectors are joined together the connection shall be made with a tee or wye fittingmanufactured for the purpose.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

It has been common practice of cutting a hole in the side of a single-wall vent connector andinserting another vent connector into the hole. The connector often projects into the interior of theother connector creating an obstruction as well as the joint gap will introduce extra air which mayimpact overall vent performance.

ResponseMessage:

FR-35-NFPA 54-2018



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12.11.10 Chimney Connection.

12.11.10.1 Where entering a flue in a masonry or metal chimney, the vent connector shall be installedabove the extreme bottom to avoid stoppage.

12.11.10.2 Where a thimble or slip joint is used to facilitate removal of the connector, the connector shall befirmly attached to or inserted into the thimble or slip joint to prevent the connector from falling out.

12.11.10.3 Means shall be employed to prevent the connector from entering so far as to restrict the spacebetween its end and the opposite wall of the chimney flue.


Committee: NFG-AAA


Committee Statement

Committee Statement: Separating the requirements into subsections to comply with the Manual of Style.



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12.13.2.2

Where a draft hood of special design is needed or preferable, the installation shall be approved and inaccordance with the recommendations of the appliance manufacturer.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Section 12.13.2 applies to listed appliances. A use of a draft hood that is not listed with theappliance will invalidate the listing of that appliance.

ResponseMessage:

FR-36-NFPA 54-2018



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12.14 Manually Operated Dampers.

12.14.1 A manually operated damper shall not be placed in any appliance vent connector. Fixed bafflesand balancing baffles shall not be classified as manually operated dampers.

12.14.2* Balancing baffles shall be mechanically locked in the desired position before placing the appliancein service.

A.12.14.2 Balancing baffles are typically used in engineered systems and are provided to allow draftadjustment during appliance and venting system commissioning. They are fixed in place and not adjustedafter commissioning.

12.14.3 Balancing baffles shall be listed in accordance with UL 378, Draft Equipment .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The code does not currently acknowledge the common use of baffles which are commonly utilized inmechanical draft systems. These baffles are manually adjusted at the time of installation and thenmechanically fixed into position after determination of the proper position of each baffle for a multipleappliance system. The code specifically addresses “Manually Operated Dampers” in the prohibitioncited in Section 12.14. “Fixed baffles” are also addressed as allowable in that section. The problemarises in that it has been interpreted that a baffle used as a balancing baffle should be viewed as“manually adjustable” and hence is prohibited.

ResponseMessage:

FR-144-NFPA 54-2018

Public Input No. 199-NFPA 54-2018 [New Section after A.12.13.4]


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12.15 Automatically Operated Vent Dampers.

An automatically operated vent damper shall be of a be listed type .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The phrase "of a listed type" is not defined nor clear. It is clear what a listed automaticallyoperated vent damper is.

ResponseMessage:

FR-46-NFPA 54-2018



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13.1.17 Sizing Vents Not Covered by Tables.

For Where a vent heights height is lower than 6 ft (1.8 m) and or higher than shown in the Chapter 13tables, an engineering methods method shall be used to calculate the vent capacities capacity .


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Editorial revision to improve clarity. "and" was changed to "or" because the tables start with aheight of 6 feet, and these two conditions cannot exist at the same time.

ResponseMessage:

FR-47-NFPA 54-2018



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13.2.19 Two-Stage/Modulating Appliances.

For appliances with more than one input rate, the 13.2.19.1 The minimum vent connector capacity (FANMin) of appliances with more than one input rate shall be determined from the tables and shall be lessthan the lowest appliance input rating, and the .

13.2.19.2 The maximum vent connector capacity (FAN Max or NAT Max) shall be determined from thetables and shall be greater than the highest appliance input rating.





Committee: NFG-AAA


Committee Statement

Committee Statement: Editorial revisions for clarity.




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First Revision No. 159-NFPA 54-2018 [ Section No. A.12.9 ]

A.12.9

See Figure A.12.9 .

Figure A.12.9 Exit Terminals of Mechanical Draft and Direct Vent Venting Systems.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

A new table and figure 12.9.1 has been added to the body of the code. Annex A material forsection 12.9 is no longer needed.

ResponseMessage:

FR-159-NFPA 54-2018

Public Input No. 116-NFPA 54-2018 [Section No. A.12.9]


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First Revision No. 32-NFPA 54-2018 [ Section No. B.7.3 ]

B.7.3 Example 3 — Branch Length Method. [

Approved


File Name

54_FR_32_B.7.3.docx

Description



Committee: NFG-AAA


Committee Statement

Committee Statement: This revision fixes two incorrect conversions.


(4) Section D:

(a) The length of tubing from the point of delivery to the water heater at the end of Section D is 30 ft (9.14 m), A + D.

(b) Use this branch length to size Section D only.

(c) Using the row marked 30 ft (9.14 m) in Table 6.2.1(j), Section D supplying 35 cfh (34.690.99 m3/hr) for the water heater requires 3⁄8 in. (10 mm) tubing.

(5) Section E:

(a) The length of tubing from the point of delivery to the furnace at the end of Section E is 30 ft (9.14 m), A + E.

(b) Use this branch length to size Section E only.

(c) Using the row marked 30 ft (9.14 m) in Table 6.2.1(j), Section E supplying 80 cfh (0.992.26 m3/hr) for the furnace requires 1⁄2 in. (15 mm) tubing.

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First Revision No. 130-NFPA 54-2018 [ Section No. D.1 ]

D.1

Where an investigation discloses a concentration of gas inside of a building, it is suggested the followingimmediate actions be taken:

(1) Clear the room, building, or area of all occupants. Do not re-enter the room, building, or area until thespace has been determined to be safe.

(2) Use every practical means to eliminate sources of ignition. Take precautions to prevent smoking,striking matches, operating electrical switches or devices, opening furnace doors, and so on. Ifpossible, cut off all electric circuits at a remote source to eliminate operation of automatic switches inthe dangerous area. Safety flashlights designed for use in hazardous atmospheres are recommendedfor use in such emergencies.

(3) Notify all personnel in the area and the gas supplier from a telephone call 911 from an area remotefrom the area of the leak.

(4) Ventilate the affected portion of the building by opening windows and doors.

(5) Shut off the supply of gas to the areas involved.

(6) Investigate other buildings in the immediate area to determine the presence of escaping gas therein.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

Emergency responders contacted through 911 will contact the appropriate agencies,following their protocols.



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F.2.2 Example 5(a): Common Venting a Draft Hood–Equipped Water Heater with a Fan-Assisted Furnaceinto a Type B Vent.

Solution

Water Heater Vent Connector Diameter. Since the water heater vent connector horizontal length of 4 ft isless than the maximum value listed in Table 13.2(b), the venting table values can be used withoutadjustments. Using the Vent Connector Capacity portion of Table 13.2(b), read down the Total Vent Height(H) column to 30 ft and read across the 2 ft Connector Rise (R) row to the first Btu/hr rating in the NAT Maxcolumn that is equal to or greater than the water heater input rating. The table shows that a 3 in. ventconnector has a maximum input rating of 37,000 Btu/hr. Although this rating is greater than the water heaterinput rating, a 3 in. vent connector is prohibited by 13.2.19 24 . A 4 in. vent connector has a maximum inputrating of 67,000 Btu/hr and is equal to the draft hood outlet diameter. A 4 in. vent connector is selected.Since the water heater is equipped with a draft hood, there are no minimum input rating restrictions.


Committee: NFG-AAA


First Revision No. 54-NFPA 54-2018 [ Section No. F.2.2 ]


Committee Statement

Committee Statement: Correcting a cross reference that was incorrect.


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Water Heater Vent Connector Diameter. Using Table 13.2(a), Vent Connector Capacity, read down theTotal Vent Height (H) column to 30 ft, and read across the 2 ft Connector Rise (R) row to the first Btu/hourrating in the NAT Max column that is equal to or greater than the water heater input rating. The table showsthat a 3 in. vent connector has a maximum capacity of 39,000 Btu/hr. Although this rating is greater than thewater heater input rating, a 3 in. vent connector is prohibited by 13.2.22 24 . A 4 in. vent connector has amaximum input rating of 70,000 Btu/hr and is equal to the draft hood outlet diameter. A 4 in. vent connectoris selected.


First Revision No. 55-NFPA 54-2018 [ Section No. F.2.4 ]

F.2.4 Example 5(c): Common Venting into an Exterior Masonry Chimney.


Committee: NFG-AAA


Committee Statement

Committee Statement: Correcting a cross reference that was incorrect.


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153

First Revision No. 57-NFPA 54-2018 [ Section No. G.4.2 ]

G.4.2 Vent System Size and Installation.

Verify that the existing venting system size and installation are compliant with Chapters 11 12 and 1213 of NFPA 54. The size and installation of venting systems for other than natural draft and Category Iappliances should be in compliance with the manufacturer’s installation instructions. Inspect the ventingsystem to determine that it is free of blockage, restriction, leakage, corrosion, and other deficiencies thatcould cause an unsafe condition. Inspect masonry chimneys to determine if they are lined. Inspect plasticventing system to determine that it is free of sagging and it is sloped in an upward direction to the outdoorvent termination.


Committee: NFG-AAA


Committee Statement

Committee Statement: Correcting cross references that were incorrect.



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G.4 4 .4 Flooded Appliances.

Inspect the appliance for signs that the appliance may have been damaged by flooding. Signs of floodinginclude a visible water submerge line on the appliance housing, excessive surface or component rust,deposited debris on internal components, and mildew-like odor. Inform the owner that any part of theappliance control system and any appliance gas control that has been under water must be replaced. Allflood-damaged plumbing, heating, cooling, and electrical appliances should be replaced.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

AHRI recommends replacement of appliances, regardless of the damage state or assessment.Under current (4), a servicing technician is going to have to decide, which may not correspond towhat AHRI and the manufacturers they represent recommend.

ResponseMessage:

FR-113-NFPA 54-2018

Public Input No. 110-NFPA 54-2018 [Section No. G.4.4]


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G.5.2 Test for Combustion Air and Vent Drafting for Natural Draft and Category I Appliances.

(14) If, after completing the spillage test it is believed sufficient combustion air is not available, the ownershould be notified that an alternative combustion air source is needed in accordance with Section 9.3of the National Fuel Gas Code. Where it is believed that the venting system does not provide adequatenatural draft, the owner should be notified that alternative vent sizing, design or configuration is neededin accordance with Chapter 11 12 and 12 13 of NFPA 54. If spillage occurs, the owner should benotified as to its cause, be instructed as to which position of the door (open or closed) would lessen itsimpact, and to arrange for corrective action by an HVAC professional.


Committee: NFG-AAA


Committee Statement


Committee Statement: Correcting cross references that were incorrect.


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First Revision No. 132-NFPA 54-2018 [ Section No. H.3 ]

H.3 New Installation, Known Air Infiltration Rate Method.


ApprovedFile Name

54_FR_132_H.3.docx

Description



Committee: NFG-AAA


Committee Statement

Committee Statement: This revision is correcting a cross reference and correcting an error in the example.


Solution

(a) Fan-assisted furnace: For structures for which the air infiltration rate is known, the method shown in 9.3.2.2 permits the use of the equation in 9.3.2.2(2) to determine the required volume for a fan-assisted appliance. Paragraph 9.3.2.3 2(3) limits the use of the equation to air change rates equal to or less than 0.60 ACH. Because 0.30 ACH is less than 0.60 ACH, 0.30 can be used to calculate the required volume. Using the equation in 9.3.2.2(2), the required volume for a 100,000 Btu/hr fan-assisted furnace is calculated as follows:

(b) Draft hood–equipped water heater: For structures for which the air infiltration rate is known, the method shown in 9.3.2.2 permits the use of the equation in 9.3.2.2(1) to determine the required volume for a draft hood–equipped appliance. Paragraph 9.3.2.2(3) limits the use of the equation to air change rates equal to or less than 0.60 ACH. Because 0.30 ACH is less than 0.60 ACHWhile the house was determined to have a 0.65 ACH, 0.30 ACH is used to calculate the required volume. Using the equation in 9.3.2.2(1), the required volume for the 40,000 Btu/hr water heater is calculated as follows:

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pcabot

Line

pcabot

Line

pcabot

Rectangle

pcabot

Rectangle

First Revision No. 131-NFPA 54-2018 [ Section No. I.1 ]

I.1 Example of Combination Indoor and Outdoor Combustion Air Opening Design.

The Standard Method requires that the required volume be determined based on 50 ft3 per1000 Btu/hr. Using Table A.9.3.2.1, the required volume for a 140,000 Btu/hr water heater combined

input is 7000 ft3.



Committee: NFG-AAA


Committee Statement

CommitteeStatement:

ResponseMessage:

An error is being corrected. This value refers to the combined input of multiple appliances,not just the water heater.

FR-131-NFPA 54-2018

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First Revision No. 53-NFPA 54-2018 [ Chapter K ]

Annex K Informational References

K.1 Referenced Publications.

The documents or portions thereof listed in this annex are referenced within the informational sections ofthis code and are not part of the requirements of this document unless also listed in Chapter 2 for otherreasons.

K.1.1 NFPA Publications.


NFPA 56, Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable GasPiping Systems, 2017 edition.

NFPA 58, Liquefied Petroleum Gas Code, 2017 edition.

NFPA 68, Standard on Explosion Protection by Deflagration Venting, 2013 2018 edition.


NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, 2018 edition.

NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning Systems, 2018 edition.

NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, 2017edition.

NFPA 780, Standard for the Installation of Lightning Protection Systems, 2017 edition.

National Fuel Gas Code Handbook, 2018 edition.

K.1.2 Other Publications.

K.1.2.1 API Publications.

American Petroleum Institute, 1220 L Street, NW, Washington, DC 20005-4070.

API STD 1104, Welding Pipelines and Related Facilities, 2013.

K.1.2.2 ASHRAE Publications.

ASHRAE, Inc., 1791 Tullie Circle, N.E., Atlanta, GA 30329-2305, (404) 636-8400, www.ashrae.org.

ASHRAE Handbook — Fundamentals, 2013 2017 .

ASHRAE Handbook — HVAC Systems and Equipment, 2012 2016 .

K.1.2.3 ASME Publications.

American Society of Mechanical Engineers, Two Park Avenue, New York, NY 10016-5990, (800) 843-2763,www.asme.org.

Boiler and Pressure Vessel Code, Section IX and Section IV, 2015.

ANSI/ASME B16.1, Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250, 2010 2015 .

ANSI/ASME B36.10M, Welded and Seamless Wrought Steel Pipe, 2015.


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K.1.2.4 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, (610)833-9585, www.astm.org.

ASTM A53/A53M, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded andSeamless, 2012 2018 .

ASTM A106/A106M, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service,2015 2018 .

ASTM A254/A254M, Standard Specification for Copper-Brazed Steel Tubing, 2012.

ASTM B88, Standard Specification for Seamless Copper Water Tube, 2014 2016 .

ASTM B210, Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes, 2012.

ASTM B241/B241M, Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe andSeamless Extruded Tube, 2016.

ASTM B280, Standard Specification for Seamless Copper Tube for Air-Conditioning and Refrigeration FieldService, 2016 2018 .

ASTM D2385, Test Method for Hydrogen Sulfide and Mercaptan Sulfur in Natural Gas (Cadmium Sulfate —Iodometric Titration Method), 1981, reaffirmed 1990 (withdrawn 1995).

ASTM D2420, Method of Test for Hydrogen Sulfide in Liquefied Petroleum (LP) Gases (Lead AcetateMethod), 2013, reaffirmed 2018 .

ASTM D2513, Standard Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings,2014 2018 .

ASTM F1973, Standard Specification for Factory Assembled Anodeless Risers and Transition Fittings inPolyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems,2013, reaffirmed 2018 .

ASTM F2509, Standard Specification for Field-Assembled Anodeless Riser Kits for Use on OutsideDiameter Controlled Polyethylene Gas Distribution Pipe and Tubing, 2015.

ASTM F2945, Standard Specification for Polyamide 11 Gas Pressure Pipe, Tubing, and Fittings, 2015.

K.1.2.5 AWS Publications.

American Welding Society, 8669 NW 36 Street, #130, Miami, FL 33166-6672, (800) 443-9353,www.aws.org.

AWS B2.1/B2.1M, Specification for Welding Procedure and Performance Qualification, 2014.

AWS B2.2/B2.2M, Specification for Brazing Procedure and Performance Qualification, 2010 2016 .

K.1.2.6 CSA Group Publications.


ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing, 2014 2018 .

ANSI LC 4/CSA 6.32, Press-Connect Metallic Fittings for Use in Fuel Gas Distribution Systems, 2012,reaffirmed 2016 .

ANSI Z21.50/CSA 2.22, Vented Gas Fireplaces, 2014 2016 .

ANSI Z21.60/CSA 2.26, Decorative Gas Appliances for Installation in Solid-Fuel Burning Fireplaces,2012 2017 .

K.1.2.7 NACE Publications.

NACE International, 15835 Park Ten Place, Houston, TX 77084-4906, www.nace.org.

NACE SP0169, Control of External Corrosion on Underground or Submerged Metallic Piping Systems,2013.

K.1.2.8 UL Publications.



K.1.2.9 U.S. Government Publications.

U.S. Government Publishing Office, 732 North Capitol Street, NW, Washington, DC 20401-0001.

Responding to Residential Carbon Monoxide Incidents, Guidelines for Fire and Other EmergencyResponse Personnel, U.S. Consumer Product Safety Commission, July 23, 2002.


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K.1.2.10 Other Publications.

Piping Handbook, 2000, New York: McGraw-Hill Book Company.

Project Number 21323, Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect LightningRelated Damage, Gas Technology Institute 2015.

K.2 Informational References.

The following documents or portions thereof are listed here as informational resources only. They are not apart of the requirements of this document.

K.2.1 NFPA Publications.


NFPA 30, Flammable and Combustible Liquids Code, 2018 edition.

NFPA 59, Utility LP-Gas Plant Code, 2018 edition.

NFPA 61, Standard for the Prevention of Fires and Dust Explosions in Agricultural and Food ProcessingFacilities, 2013 2017 edition.

NFPA 86, Standard for Ovens and Furnaces, 2015 2019 edition.

NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel–Burning Appliances, 2016 edition.

NFPA 501A, Standard for Fire Safety Criteria for Manufactured Home Installations, Sites, and Communities,2013 2017 edition.


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ANSI/AGA NGV 3.1/CSA 12.3, Fuel System Components for Compressed Natural Gas Powered Vehicles,2014.

AGA/CSA NGV 1, Compressed Natural Gas Vehicle (NGV) Fueling Connection Devices, 2006 reaffirmed2012 2017 .

ANSI/CSA FC 1, Fuel Cell Technologies — Part 3-100: Stationary fuel cell power systems — Safety, 2014.

ANSI/CSA NGV 2, Natural Gas Vehicle Fuel Containers, 2007 reaffirmed 2012 2016 .

ANSI/LC 2A, Direct Gas-Fired Circulating Heaters for Agricultural Animal Confinement Buildings, 1998reaffirmed 2015.

ANSI/LC 2, Direct Gas-Fired Circulating Heaters for Agricultural Animal Confinement Buildings, 1996reaffirmed 2015.

ANSI Z21.1/CSA 1.1, Household Cooking Gas Appliances, 2016.

ANSI Z21.5.1/CSA 7.1, Gas Clothes Dryers — Volume I — Type 1 Clothes Dryers, 2015 2017 .

ANSI Z21.5.2/CSA 7.2, Gas Clothes Dryers — Volume II — Type 2 Clothes Dryers, 2013 2016 .

ANSI Z21.10.1/CSA 4.1, Gas Water Heaters — Volume I — Storage Water Heaters with Input Ratings of75,000 Btu per Hour or Less, 2014 2017 .

ANSI Z21.10.3/CSA 4.3, Gas Water Heaters — Volume III — Storage Water Heaters with Input Ratingsabove 75,000 Btu per Hour, Circulating and Instantaneous, 2015 2017 .

ANSI Z21.11.2, Gas-Fired Room Heaters — Volume II — Unvented Room Heaters, 2013 2016 .

ANSI Z21.12, Draft Hoods,1990 reaffirmed 2015.

ANSI Z21.13/CSA 4.9, Gas-Fired Low-Pressure Steam and Hot Water Boilers, 2014 2017 .

ANSI Z21.15/CSA 9.1, Manually Operated Gas Valves for Appliances, Appliance Connector Valves, andHose End Valves, 2009 reaffirmed 2014.

ANSI Z21.17/CSA 2.7, Domestic Gas Conversion Burners, 1998 reaffirmed 2014.

ANSI Z21.18/CSA 6.3, Gas Appliance Pressure Regulators, 2007 reaffirmed 2012 2016 .

ANSI Z21.19/CSA 1.4, Refrigerators Using Gas Fuel, 2014.

ANSI Z21.20/CSA C22.2 — No. 60730-2-5, Automatic Electrical Controls for Household and Similar Use —Part 2: Particular Requirements for Automatic Burner Ignition Systems and Components, 2014.

ANSI Z21.21/CSA 6.5, Automatic Valves for Gas Appliances, 2015.

ANSI Z21.22/CSA 4.4, Relief Valves for Hot Water Supply Systems, 2015.

ANSI Z21.23, Gas Appliance Thermostats, 2010 reaffirmed 2015.

ANSI Z21.24/CSA 6.10, Connectors for Gas Appliances, 2015.

ANSI Z21.35/CSA 6.8, Pilot Gas Filters, 2005 reaffirmed 2014 2015 .

ANSI Z21.40.1/CSA 2.91, Gas-Fired, Heat Activated Air-Conditioning and Heat Pump Appliances, 1996reaffirmed 2012 2017 .

ANSI Z21.40.2/CSA 2.92, Gas-Fired, Work Activated Air-Conditioning and Heat Pump Appliances (InternalCombustion), 1996 reaffirmed 2012 2017 .

ANSI Z21.40.4/CSA 2.94, Performance Testing and Rating of Gas-Fired, Air-Conditioning and Heat PumpAppliances, 1996 reaffirmed 2012 2017 .

ANSI Z21.42, Gas-Fired Illuminating Appliances, 2013.

ANSI Z21.47/CSA 2.3, Gas-Fired Central Furnaces, 2012 2016 .

ANSI Z21.54/CSA 8.4, Gas Hose Connectors for Portable Outdoor Gas-Fired Appliances, 2014.

ANSI Z21.56/CSA 4.7, Gas-Fired Pool Heaters, 2014 2017 .

ANSI Z21.57, Recreational Vehicle Cooking Gas Appliances, 2010 reaffirmed 2015 .

ANSI Z21.58/CSA 1.6, Outdoor Cooking Gas Appliances, 2015 2018 .

ANSI Z21.60/CSA 2.26, Decorative Gas Appliances for Installation in Solid-Fuel Burning Fireplaces,2012 2017 .

ANSI Z21.61, Gas-Fired Toilets, 1993 reaffirmed 2013.


K.2.2 CSA Group Publications.

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ANSI Z21.66/CSA 6.14, Automatic Vent Damper Devices for Use with Gas-Fired Appliances, 2015.

ANSI Z21.69/CSA 6.16, Connectors for Movable Gas Appliances, 2015.

ANSI Z21.71, Automatic Intermittent Pilot Ignition Systems for Field Installations, 1993 reaffirmed2015 2016 .

ANSI Z21.77/CSA 6.23, Manually-Operated Piezo-Electric Spark Gas Ignition Systems and Components,2015.

ANSI Z21.78/CSA 6.20, Combination Gas Controls for Gas Appliances, 2010 reaffirmed 2015.

ANSI Z21.84, Manually Lighted, Natural Gas Decorative Gas Appliances for Installation in Solid-FuelBurning Appliances, 2012 2017 .

ANSI Z21.86/CSA 2.32, Vented Gas-Fired Space Heating Appliances, reaffirmed 2014 2016 .

ANSI Z21.87/CSA 4.6, Automatic Gas Shutoff Devices for Hot Water Supply Systems, 2007 reaffirmed2012 2016 .

ANSI Z21.88/CSA 2.33, Vented Gas Fireplace Heaters, 2013 2017 .

ANSI Z21.91, Ventless Firebox Enclosures for Gas-Fired Unvented Decorative Room Heaters, 2007reaffirmed 2012 2017 .

ANSI Z83.4/CSA 3.7, Non-Recirculating Direct Gas-Fired Industrial Air Heaters, 2015.

ANSI Z83.8/CSA 2.6, Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters, and Gas-Fired DuctFurnaces, 2016.

ANSI Z83.11/CSA 1.8, Gas Food Service Equipment, 2016.

ANSI Z83.19/CSA 2.35, Gas-Fired High-Intensity Infrared Heaters, 2009 reaffirmed 2014 2017 .

ANSI Z83.20/CSA 2.34, Gas-Fired tubular and Low-Intensity Infrared Heaters, 2008 reaffirmed 2013 2016 .

ANSI Z83.21/CSA C 22.2 No.168, Commercial Dishwashers, 2016.

NACE SP0169, Control of External Corrosion on Underground or Submerged Metallic Piping Systems,2013.

K.2.3 MSS Publications.

Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street, NE, Vienna, VA22180-6671, www.msshq.org.

MSS SP-6, Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valvesand Fittings, 2012 2017 .

ANSI/MSS SP-58, Pipe Hangers and Supports — Materials, Design and Manufacture, 2009.

K.2.4 SAE Publications.

SAE International, 400 Commonwealth Drive, Warrendale, PA 15096, www.sae.org.

SAE J533, Flares for Tubing, 2007 2017 .

K.2.5 UL Publications.



ANSI/UL 441, Gas Vents, 2016.




K.2.6 U.S. Government Publications.

U.S. Government Publishing Office, 732 North Capitol Street, NW, Washington, DC 20401-0001,www.gpo.gov.

Title 24, Code of Federal Regulations, Part 3280, “Manufactured Home Construction and Safety Standard.”

K.3 References for Extracts in Informational Sections. (Reserved)


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163


Committee: NFG-AAA


Committee Statement

Committee Statement: Updating references to their most recent editions.


Public Input No. 161-NFPA 54-2018 [Section No. K.2.5]


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164

Committee Input No. 145-NFPA 54-2018 [ Global Input ]

The terms "baffle" and "damper" are used in many places in the code, and the distinction between them isnot clear. They appear to be interchangeable. The term "baffle" is defined in the code but "damper" is not.The committee requests input on proper terminology and will consider revising for consistency at the SecondDraft stage.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The terms "baffle" and "damper" are used in many places in the code, and the distinction betweenthem is not clear. They appear to be interchangeable. The term "baffle" is defined in the code but"damper" is not. The committee requests input on proper terminology and will consider revising forconsistency at the Second Draft stage.

ResponseMessage:

CI-145-NFPA 54-2018

National Fire Protection Association Report

1 of 11 12/7/2018, 3:01 PM

ATTACHMENT E - Committee InputsPart of the Minutes from the November 6-7, 2018, Meeting

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Committee Input No. 163-NFPA 54-2018 [ Section No. 5.9.8 ]

5.9.8 Vents.

5.9.8.1

The discharge stacks, vents, or outlet parts of all pressure relieving and pressure limiting devices shall belocated so that gas is safely discharged to the outdoors. Discharge stacks or vents shall be designed toprevent the entry of water, insects, or other foreign material that could cause blockage.

5.9.8.2

The discharge stack or vent line shall be at least the same size as the outlet of the pressure relievingdevice.

Replace with text in word file



54_CI163_5.9.8.docx


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

This text has been proposed to provide guidance for venting requirements for overpressureprotection devices. The committee needs more time to review this material and requests PublicComments.

ResponseMessage:

CI-163-NFPA 54-2018

National Fire Protection Association ReportATTACHMENT E - Committee Inputs

Part of the Minutes from the November 6-7, 2018, Meeting

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5.9.8 Discharge Vent Piping from Pressure Relieving or Limiting Devices and Bleed Ports The discharge stacks, vents, or outlet parts of all devices not equipped with a vent limiting means listed under ANSI Z21.80/CSA 6.22, Line Pressure Regulators shall be located so that gas is safely discharged to the outdoors. The discharge piping of these devices shall be in accordance with all of the following: a) An independent vent pipe to the outdoors, sized in accordance with the device manufacturer’s instructions shall be provided. b) For vent piping systems that are not required to be

independent, vents shall be permitted to be connected to a common manifold in accordance with an approved design to minimize back-pressure in the event of design discharge.

c) Materials used vent piping shall be in accordance with 5.6. d) The vent terminus shall be designed to prevent the entry of

water, insects, and other foreign matter that could cause blockage.

e) Vent piping shall be configured and installed to prevent a static load or bending moment from being placed on the body of regulators and gas pressure control devices.

f) At locations where a vent termination could be submerged during a 100 year flood an anti-flood-type breather vent fitting shall be installed, or the vent terminal shall be located above the height of the expected flood waters.

ATTACHMENT E - Committee Inputs Part of the Minutes from the November 6-7, 2018, Meeting

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g) Vent piping from devices of this section shall not beconnected to a common manifold that serves regulators.

h) Vents shall terminate not less than 3 ft (0.9 m) from apossible source of ignition and mechanical or gravity air intake openings including openable windows or doors. Where the inlet pressure to the regulator or pressure control is greater than 2 psig, the minimum distance shall be 10 feet (3 m).

i) The vent termination shall be designed to prevent the entry ofwater, insects, or other foreign materials. Any device installed to the discharge termination point for this purpose shall provide the same free area and not provide any restriction to the piping system.


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Committee Input No. 139-NFPA 54-2018 [ Section No. 7.2.6.2 ]



54_CI139_7.2.6.2.docx


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The Technical Committee is considering replacement of Table 7.2.6.2 with the table in theattached Word File, and invites Public Comments.

ResponseMessage:

CI-139-NFPA 54-2018


7.2.6.2

Spacings of supports in gas piping installations shall not be greater than shown in Table 7.2.6.2. Spacing of supports of CSST shall be in accordance with the CSST manufacturer’s instructions.

Table 7.2.6.2 Support of Piping

Steel

Pipe, .

Nomi

nal Size .

of Pipe .

(in

.)

Spacing of .

Supports .

(ft)

Nomi

nal Size .

of T

ubing .

Smooth Wall .

(in. O

.D.)

Spaci

ng of .

Supports .

(f

t)

1⁄2 6 4

3⁄4 or 1 8 6

1 1⁄4 or larger .

(horizontal) 10 8

1 1⁄4 or larger (vertical) Every floor level

1⁄2

5⁄8 or 3⁄4

7⁄8 or 1 (horizontal)

1 or larger (vertical) Every floor level

Material Nominal Diameter

(in.)

Spacing of Supports Horizontal

(ft) Vertical

Steel ½ inch ¾ to 1 inch 1 ¼ and Larger

6 8

10 The base of every floor

Copper Pipe & Tube (Drawn/Hard)) 1 inch and smaller

1-1/4 and larger 8

10 The base of every floor or every 10 (ft)

Copper Pipe & Tube (Annealed/Soft) All 8 The base of every floor or every 10 (ft)

For SI units, 1 ft = 0.305 m.


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Committee Input No. 161-NFPA 54-2018 [ Section No. 8.3 ]

8.3* Purging Requirements.

The purging of piping shall be in accordance with 8.3.1 through 8.3.3.

Table 8.3.1 Size and Length of Piping*

Nominal Piping Size

(in.)

Length of Piping

(ft)

≥21⁄2 <3 > 50

≥3 <4 > 30

≥4 <6 > 15

≥6 <8 > 10

≥8 Any length

For SI units, 1 in. = 25.4 mm; 1 ft = 0.305 m.

* CSST EHD size of 62 is equivalent to 2 in. nominal size pipe or tubing.



Committee: NFG-AAA


Committee Statement

CommitteeStatement:

ResponseMessage:

The Technical Committee is investigating whether Table 8.3.1 could be expanded to beutilized for higher pressures.

CI-161-NFPA 54-2018


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Committee Input No. 162-NFPA 54-2018 [ Global Input ]

3.3.5.5 Combination Appliance. An appliance serving more than one function where examples include, butare not limited to: generators – water heaters, generators – space heating, space heating – water heating,and space heating – refrigerator.

10.1.1.1 Combination appliances shall be considered listed appliances when the appliance is listed to eitherapplicable standard relating to the function of the appliance.


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The Technical Committee will consider the proposed new text that addresses multi functionappliances not currently addressed in the code.

ResponseMessage:

CI-162-NFPA 54-2018

National Fire Protection Association ReportATTACHMENT E - Committee Inputs

Part of the Minutes from the November 6-7, 2018, Meeting

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Committee Input No. 31-NFPA 54-2018 [ Section No. A.5.6 ]


A.5.6

Table A.5.6 is a list of piping materials and fittings that are allowed in the Code.

Table A.5.6 Pipe, Tube, Fittings, and Joints for Natural Gas and Liquefied Petroleum Gas Applications

Pipe Fitting Types Material Standard Metallic Pipe Joint Types Other Requirements

Flared

Press Connect

CSST ANSI LC 1/CSA 6.26*

ANSI LC 1/CSA 6.26* Manufacturer’s installation instructions

5.6.5, 7.2.2, 7.2.7, 7.12, 9.6.1(5)

Aluminum ASTM B210* Copper Alloy (Brass) Compression 5.6.5, 7.2.2, 7.12, 9.5.1.2, 9.6.1(2)

ASTM B241/B241M* Special

Steel ASTM A254/A254M*

Special 5.6.3, 5.6.5, 5.6.7.5, 7.2.2, 7.12

Stainless Steel ASTM A268* Approved Welded 5.6.3, 5.6.5, 7.2.2, 7.12 ASTM A269* ANSI LC 4* Brazed

Press Connect

Non-Metallic Pipe

Polyethylene (PE) ASTM D2513* Polyethylene (PE) ASTM D2513* (heat fusion)or Polyamide (PA)

Manufacturer’s instructions

5.6.5, 5.6.8, 7.1.7, 7.2.2

Polyamide (PA) ASTM F2945*

ASTM D2513* .

(Heat fusion) Polyamide (PA) ASTM F2945* (heat fusion)

Compression-type mechanical joints

Service head adapters meeting Category I of ASTM D2513*

Heat Fusion

Connections to Metallic Pipe meeting ASTM D2513*, ASTM F1973*, or ASTM F2509*

*Required standard. See Annex K for standard title.



54_CI31_A.5.6.docx


Committee: NFG-AAA


Committee Statement

CommitteeStatement:

The committee is reviewing this table to include polyamide pipe heat fusion fittings (correlating withsection 5.6.8). The ASTM F2945 standard was added into the 2018 edition but the committee didnot review the fitting section to include heat fusion fittings made of the material. Overall, thecommittee will be reviewing this table to make sure that the layout is conveying the correctinformation.

ResponseMessage:

CI-31-NFPA 54-2018


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Public Input No. 157-NFPA 54-2018 [ Global Input ]

Type your content here ...Remove ANSI from in front of all UL standards referenced in NFPA 54.

Statement of Problem and Substantiation for Public Input

Many years ago, UL preferred the ANSI/UL reference because there was a transition of traditional UL standards towards an ANSI standards development process.

Now, years later, a large majority of UL Standards are ANSI approved and follow the ANSI development and maintenance process. However, sometimes readers are confused because they don’t understand the standards are actually UL standards, not developed by ANSI. There are many other references to standards promulgated by other standards development organizations where they are considered ANSI approved but do not include ANSI in the reference.


Submitter Full Name: Kelly Nicolello

Organization: UL LLC

Street Address:

City:

State:

Zip:

Submittal Date: Tue Jun 26 14:14:42 EDT 2018

Committee:

Committee Statement

Resolution: FR-38-NFPA 54-2018

Statement: Many years ago, UL preferred the ANSI/UL reference because there was a transition of traditional ULstandards towards an ANSI standards development process.

Now, years later, a large majority of UL Standards are ANSI approved and follow the ANSIdevelopment and maintenance process. However, sometimes readers are confused because theydon’t understand the standards are actually UL standards, not developed by ANSI. There are manyother references to standards promulgated by other standards development organizations where theyare considered ANSI approved but do not include ANSI in the reference.

National Fire Protection Association ReportATTACHMENT F - Report on Public Input

Part of the Minutes from the November 6-7, 2018 Meeting

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5.4.3* Sizing Methods. Gas piping shall be sized in accordance with one of the following:


(2) Other approved Engineering methods


5.8.5.1 (1) (a) Where more than one regulator is at a location, each regulator shall have a separatevent to the outdoors or, if approved by the authority having jurisdiction, the vent lines shall bepermitted to be manifolded in accordance with accepted engineering practices methods tominimize back pressure in the event of diaphragm failure.

7.11.5.1* Location. The gas-mixing machine shall be located in a well-ventilated area or in adetached building or cutoff room provided with room construction and explosion vents inaccordance with sound engineering principles. Such rooms or belowgrade installations shall haveadequate positive ventilation.

9.1.1.3 Acceptance of unlisted appliances, equipment, and accessories shall be on the basis of ananalysis using engineering evaluation methods.

9.3.5 Engineered Installations. Engineered combustion air installations shall provide anadequate supply of combustion, ventilation, and dilution air determined using engineering methodsand shall be approved by the authority having jurisdiction.

10.8.7.1 The structure’s designed infiltration rate and the size of relief opening(s) shall bedetermined by approved engineering methods.

10.9.7.1 The structure’s designed infiltration rate and the size of relief opening(s) shall bedetermined by approved engineering methods.

12.6.3 Size of Chimneys.12.6.3.1 The effective area of a chimney venting system serving listed appliances with draft hoods,Category I appliances, and other appliances listed for use with Type B vents shall be in accordancewith one of the following methods:

[(1) (2) (3) Unchanged]



11. Revise 12.7.4.1 (5) to read:

(5) Other approved engineering practices methods

12. Revise 12.7.4.4 to read:

12.7.4.4 Sizing. Chimney venting systems using mechanical draft shall be sized in accordancewith approved engineering methods.


12.7.5.1 Where a common vent shall be permitted is installed in multistory installations to ventCategory I appliances located on more than one floor level, provided the venting system is shall bedesigned and installed in accordance with approved engineering methods. For the purpose of thissection, In multistory installations crawl spaces, basements, and attics shall be considered floorlevels.

14. Revise 12.8.5(c) to read:

(c) Other approved engineering methods.


12.11.3.1 A vent connector for an appliance with a single draft hood or for a Category I fan-assisted combustion system appliance shall be sized and installed in accordance with Chapter 13or other approved engineering methods.



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12.11.3.2 For a single appliance having more than one draft hood outlet or flue collar, the manifoldshall be constructed according to the instructions of the appliance manufacturer. Where there areno instructions, the manifold shall be designed and constructed in accordance with an approvedengineering practices method. As an alternative method, the effective area of the manifold shallequal the combined area of the flue collars or draft hood outlets, and the vent connectors shall havea minimum 1 ft (0.3 m) rise.


12.11.3.3 Where two or more appliances are connected to a common vent or chimney, each ventconnector shall be sized in accordance with Chapter 13 or other approved an engineering methodsmethod.

12.11.3.5 Where two or more appliances are vented through a common vent connector or ventmanifold, the common vent connector or vent manifold shall be located at the highest levelconsistent with available headroom and clearance to combustible material and sized in accordancewith Chapter 13 or other approved an engineering methods method.

12.16 Obstructions. Devices that retard the flow of vent gases shall not be installed in a ventconnector, chimney, or vent. The following shall not be considered as obstructions:

(2) Approved draft regulators and safety controls designed and installed in accordance withapproved engineering methods

(4) Vent dampers serving listed appliances installed in accordance with 13.1.1 or 13.2.1 or otherapproved engineering methods

13.1.9 Vertical Vent Upsizing/7 × Rule. Where the vertical vent has a larger diameter than thevent connector, the vertical vent diameter shall be used to determine the minimum vent capacity,and the connector diameter shall be used to determine the maximum vent capacity. The flow area ofthe vertical vent shall not exceed seven times the flow area of the listed appliance categorized ventarea, flue collar area, or draft hood outlet area unless designed in accordance with approvedengineering methods.

13.2.18 Vertical Vent Size Limitation. Where two or more appliances are connected to avertical vent or chimney, the flow area of the largest section of vertical vent or chimney shall notexceed seven times the smallest listed appliance categorized vent areas, flue collar area, or drafthood outlet area unless designed in accordance with approved an engineering method.


The term “engineering method” is proposed to be used throughout the code. It is noted that other terms (“sound engineering method” and “approved engineering method”) are used. The term “sound engineering method” is not defined, and it appears to mean the same as “engineering method”. The term “approved engineering methods” is replaced with “engineering methods”. The terms appear to be used interchangeably, and the proposed addition of a new Section 4.5, Engineering Methods (which allows the AHJ to require documentation) eliminates the need to specify which engineering methods require approval.


Submitter Full Name: Thomas Crane

Organization: Crane Engineering

Street Address:

City:

State:

Zip:

Submittal Date: Wed Jun 13 15:08:01 EDT 2018

Committee:

Committee Statement



Statement: The term “approved engineering method” is revised to be used consistently throughout the code.

ATTACHMENT F - Report on Public Input Part of the Minutes from the November 6-7, 2018 Meeting

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Substutite "installed" for "mounted" and "mounting"


Installed is the proper term. "Mounted" and "mounting" were used historically and many of the uses of "mounted" and "mounting" have been changed in previous editions.


Submitter Full Name: Theodore Lemoff

Organization: TLemoff Engineering

Affiliation: None

Street Address:

City:

State:

Zip:

Submittal Date: Tue Feb 13 11:21:44 EST 2018

Committee:

Committee Statement


Statement: Installed is the proper term. "Mounted" and "mounting" were used historically and many of the uses of"mounted" and "mounting" have been changed in previous editions.



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Public Input No. 88-NFPA 54-2018 [ Section No. 1.1.1.1(A) ]

(A)*

Coverage of piping systems shall extend from the point of delivery to the appliance connections. For otherthan undiluted liquefied petroleum gas (LP-Gas) systems, the point of delivery shall be the outlet of theservice meter assembly or the outlet of the service regulator or service shutoff valve where no meter isprovided. For undiluted LP-Gas systems, the point of delivery shall be considered to be the outlet of thefinal pressure regulator, exclusive of line gas regulators where no meter is installed. Where a meter isinstalled, the point of delivery shall be the outlet of the meter.


A new point of delivery definition (see our public input) would render the description in 1.1.1.1(A) unnecessary. While the term has been long defined in scoping section 1.1.1.1 (A), it may be overlooked or hard to find by code users.

Related Public Inputs for This Document

Related Input Relationship



Submitter Full Name: James Ranfone

Organization: American Gas Assn

Street Address:

City:

State:

Zip:

Submittal Date: Thu Jun 07 15:44:18 EDT 2018

Committee:

Committee Statement

Resolution: This section of the code is enforceable and this is the necessary language for enforcement. Adefinition has also been added to Chapter 3 for clarity.



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Public Input No. 55-NFPA 54-2018 [ Section No. 1.2 ]

1.2 Purpose.

(Reserved)The purpose of this code is to provide requirements to ensure the safe installation of residential,commercial and industrial fuel gas systems inside and outside of buildings. The requirements areintended to provide guidance to designers, installers, officials, and users of the code.


A "Purpose" statement is recommended to be added to the Code.




Affiliation: None

Street Address:

City:

State:

Zip:

Submittal Date: Fri Feb 16 14:48:08 EST 2018

Committee:

Committee Statement

Resolution: The proposed language is too limiting and does not adequately cover the scope of the code.



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ANSI/CSA B149.6, Code for Digester Gas, Landfill Gas, and Biogas Generation and Utilization , 2015.

ANSI/CSA FC 1, Fuel Cell Technologies - Part 3-100: Stationary Fuel Cell Power Systems - Safety , 2014

ANSI/CSA NGV 5.1, Residential Fueling Appliances, 2015.

ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST), 20142018 .

ANSI LC 4/CSA 6.32, Press-Connect Metallic Fittings for Use in Fuel Gas Distribution Systems, 2012.

ANSI Z21.1/CSA 1.1, Household Cooking Gas Appliances , 2016.

ANSI Z21.5.1/CSA 7.1, Gas Clothes Dryers, Volume I, Type 1 Clothes Dryers, 2017.

ANSI Z21.5.2/CSA 5.2, Gas Clothes Dryers, Volume II, Type 2 Clothes Dryers , 2017.

ANSI Z21. 8, Installation of Domestic Gas Conversion Burners, 1994, reaffirmed 2012.

ANSI Z21.10.1/CSA 4.1, Gas Wate r Heaters, Volume I, Storage Water Heaters with Input Ratings of75,000 Btu per Hou ror Less , 2017 .

ANSI Z21.10.3/CSA 4.3,Gas Water Heaters, Volume III, Storage Water Heaters with Input Ratings Above75,000 Btu per Hour, Circulating or Instantaneous , 2017 .

ANSI Z21. 11.2, Gas-Fired Room Heaters — Volume II, Unvented Room Heaters, 2013.

ANSI Z21. 13/CSA 4.9, Gas-fired Low Pressure Steam and Hot Water Boilers , 2017.

ANSI Z21.18/CSA 6.3, Gas Appliance Pressure Regulators, 2007, reaffirmed 2017.

ANSI Z21.19/CSA 1.4, Refrigerators Using Gas Fuel, 2014.

ANSI Z21.22/CSA 4.4, Relief Valves for Hot Water Supply Systems, 2015.

ANSI Z21. 24/CSA 6.10, Connectors for Gas Appliances, 2015.

ANSI Z21.40.1/CSA 2.91, Gas-fired Heat Activated Air Conditioning and Heat Pump Appliances , 1996.

ANSI Z21.40.2/CSA 2.92, Air Conditioing and Heat Pump Appliances (Internal Combustion) , 1996.

ANSI Z21. 41/CSA 6.9, Quick-Disconnect Devices for Use with Gas Fuel Appliances, 2014.

ANSI Z21.42, Gas-fired Illuminating Appliances , 2013

ANSI Z21.47/CSA 2.3, Gas-fired Central Furnaces , 2016.

ANSI Z21.50/CSA 2.22, Vented Decorative Gas Appliances , 2016.

ANSI Z21. 54/CSA 8.4, Gas Hose Connectors for Portable Outdoor Gas-Fired Appliances, 2014.

ANSI Z21. 56/CSA 4.7, Gas-fired Pool Heaters, 2017 .

ANSI Z21.58/CSA 1.6, Outdoor Cooking Gas Appliances , 2018.

ANSI Z21.60/CSA 2.26, Decorative Gas Appliances for Installation in Solid-Fuel Burning Fireplaces , 2017.

ANSI Z21. 69/CSA 6.16, Connectors for Movable Gas Appliances, 2009.

ANSI Z21.75/CSA 6.27, Connectors for Outdoor Gas Appliances and Manufactured Homes, 2007,reaffirmed 2012.

ANSI Z21.80/CSA 6.22, Line Pressure Regulators, 2011.

ANSI Z21.84, Manually lighted, Natural Gas, Decorative Gas Appliances for Installation in Solid-FuelBurning Appliances , 2017.

ANSI Z21.86/CSA 2.32, Vented G as -fired Space Heating Appliances , 2016.

ANSI Z21.88 /CSA 1.18, Outdoor Cooking Specialty Gas Appliances, 2017.

ANSI Z21. 90/CSA 6.24, Gas Convenience Outlets and Optional Enclosures, 2015.

ANSI Z21.93/CSA 6.30, Excess Flow Valves for Natural and LP-Gas with Pressures Up to 5 psig, 2013.

ANSI Z21.97/CSA 2.41, Outdoor Decorative Gas Appliances, 2017.

ANSI Z83.4/CSA 3.7, Non-Recirculating Direct Gas-Fired Industrial Air Heaters, 2015 Heating and ForcedVentilation Appliances for Commercial and Industrial Application, 2017.

ANSI Z83.8/CSA 2.6, Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters, and Gas-fired Duct


Public Input No. 133-NFPA 54-2018 [ Section No. 2.3.3 ]


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Furnaces , 2016 .

ANSI Z83.11/CSA 1.8, Gas Food Service Equipment , 2016.

ANSI Z83. 18, Recirculating Direct Gas-Fired Industrial Air Heaters, 2015. Fired Heating and ForcedVentilation Appliances for Commercial and Industrial Application, 2017.

ANSI Z83.19/CSA 2.35, Gas-fired Hi gh-Intensity Infrared Heaters, 2017.

ANSI Z83.20/CSA 2.34, Gas-fired Tubular and Low-intensity Infrared Heaters , 2016.

ANSI Z83.26/CSA 2.37, Gas-fired Outdoor Infrared Patio Heaters , 2014.


This proposal is intended to provide clarity in the Code by including reference to the applicable ANSI standards in the body of the Code. This proposal supplements additional proposals to Chapter 3, Chapter 9, and Annex A.























Public Input No. 188-NFPA 54-2018 [Section No. 10.26] Public Input No. 189-NFPA 54-2018 [Section No. 10.27] Public Input No. 194-NFPA 54-2018 [Section No. 10.31]


Public Input No. 196-NFPA 54-2018 [New Section after A.3.3.5.11.1]




Submitter Full Name: Shannon Corcoran

Organization: CSA Group

Street Address:

City:


Mon Jun 25 09:56:38 EDT 2018

State:

Zip:

Submittal Date:

Committee:

Committee Statement


Statement: Updating references to their most recent editions. Also adding new referenced documents.


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2.3.5 UL Publications.



ANSI/UL 441, Gas Vents, 2010, reapproved 2014 2016 .

ANSI/UL 467, Grounding and Bonding Equipment, 2013.



ANSI/UL 959, Medium Heat Appliance Factory-Built Chimneys, 2010, reapproved revised 2014.



ANSI/UL 2158A, Clothes Dryer Transition Ducts, 2013.

ANSI/UL 2561, 1400 Degree Fahrenheit Factory-Built Chimneys, 2009 2016 , reapproved 2013 revised2018 .

UL 378, Draft Equipment, 2006, reapproved revised 2013.


Update the publishing dates for each of the UL standards listed to reflect the most up to date edition.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: Updating references to their most recent editions. Also adding new referenced documents.



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3.3.3 Air Conditioning.

The treatment of air so as to control simultaneously its temperature, humidity, cleanness, and distribution tomeet the requirements of a conditioned space.


This definition is not needed. Air Conditioning is a widely used term that does not need to be defined in the Code as the definition is essentially identical to the dictionary definition.




Affiliation: None

Street Address:

City:

State:

Zip:

Submittal Date: Wed Feb 07 13:19:46 EST 2018

Committee:

Committee Statement


Statement: This definition is not needed. Air Conditioning is a widely used term that does not need to be definedin the Code as the definition is essentially identical to the dictionary definition.



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3.3.5 Appliance.

Any device that utilizes a fuel to produce light, heat, power, refrigeration, or air conditioning, or a devicecapable of compressing fuel .



3.3.5.2 Decorative Appliance for Installation in a Vented Fireplace.

A self-contained, freestanding, fuel gas–burning appliance designed for installation only in a ventedfireplace and whose primary function lies in the aesthetic effect of the flame.

3.3.5.3 Direct Vent Appliances.

Appliances that are constructed and installed so that all air for combustion is derived directly from theoutdoors and all flue gases are discharged to the outdoors.

3.3.5.4 Fan-Assisted Combustion Appliance.

An appliance equipped with an integral mechanical means to either draw or force products of combustionthrough the combustion chamber or heat exchanger.

3.3.5.5 Food Service Appliance.


An oven primarily intended for volume food preparation that is composed of one or more sections or units ofthe following types: (1) cabinet oven, an oven having one or more cavities heated by a single burner orgroup of burners; (2) reel-type oven, an oven employing trays that are moved by mechanical means; or (3)sectional oven, an oven composed of one or more independently heated cavities.

3.3.5.5.2 Gas Counter Appliance.

An appliance such as a gas coffee brewer and coffee urn and any appurtenant water heating appliance,food and dish warmer, hot plate, and griddle.

3.3.5.5.3 Gas Deep Fat Fryer.

An appliance, including a cooking vessel in which oils or fats are placed to such a depth that the cookingfood is essentially supported by displacement of the cooking fluid or a perforated container immersed in thecooking fluid rather than by the bottom of the vessel, designed primarily for use in hotels, restaurants,clubs, and similar institutions.







3.3.5.5.7 Kettle.

An appliance with a cooking chamber that is heated either by a steam jacket in which steam is generatedby gas heat or by direct gas heat applied to the cooking chamber.

3.3.5.6 Gas Counter Appliances.

See 3.3.5.5.2.

3.3.5.7 Household Cooking Appliance.

An appliance for domestic food preparation, providing at least one function of (1) top or surface cooking, (2)oven cooking, or (3) broiling.



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3.3.5.7.1 Household Broiler Cooking Appliance.

A unit that cooks primarily by radiated heat.

3.3.5.7.2 Household Built-In Unit Cooking Appliance.

A unit designed to be recessed into, placed upon, or attached to the construction of a building, but not forinstallation on the floor.

3.3.5.8 Nonresidential, Low-Heat Appliance.

An appliance needing a chimney capable of withstanding a continuous flue gas temperature not exceeding1000°F (538°C).

3.3.5.9 Nonresidential, Medium-Heat Appliance.

An appliance needing a chimney capable of withstanding a continuous flue gas temperature not exceeding1800°F (982°C).

3.3.5.10 Outdoor Cooking Appliance.

A gas-fired cooking appliance for outdoor use only that is provided with a means of support by themanufacturer and is connected to a fixed gas piping system.

3.3.5.11 Vented Appliance.

3.3.5.11.1* Category I Vented Appliance.

An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature thatavoids excessive condensate production in the vent.

3.3.5.11.2 Category II Vented Appliance.

An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that cancause excessive condensate production in the vent.

3.3.5.11.3 Category III Vented Appliance.

An appliance that operates with a positive vent static pressure and with a vent gas temperature that avoidsexcessive condensate production in the vent.

3.3.5.11.4 Category IV Vented Appliance.

An appliance that operates with a positive vent static pressure and with a vent gas temperature that cancause excessive condensate production in the vent.


The revision will include CNG fueling appliances under the appliance definition and make them subject to the code’s requirements. CNG fuel appliances utilize fuel (electricity) to compress natural gas. CNG appliances are covered under section 10.28.




Street Address:

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Committee:

Committee Statement


Statement: The revision will include CNG fueling appliances under the appliance definition and make themsubject to the code’s requirements. CNG fuel appliances are used to compress natural gas. CNGappliances are covered under section 10.28.



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Public Input No. 5-NFPA 54-2018 [ Section No. 3.3.5.1 ]




The term is not used in the Code, other than in the definition. Terms that are not used in the document should not be defined.




Affiliation: None

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Committee:

Committee Statement


Statement: The term is not used in the Code, other than in the definition. Terms that are not used in thedocument should not be defined.



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Public Input No. 6-NFPA 54-2018 [ Section No. 3.3.5.5.1 ]


An oven primarily intended for volume food preparation that is composed of one or more sections or unitsof the following types: (1) cabinet oven, an oven having one or more cavities heated by a single burner orgroup of burners; (2) reel-type oven, an oven employing trays that are moved by mechanical means; or (3)sectional oven, an oven composed of one or more independently heated cavities.


The term is not used in the Code, other than this definition, and in 3.3.72, the definition of "Oven, Gas Baking and Roasting". which references this definition. A separate proposal has been submitted to delete 3.3.72.







Affiliation: None

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Statement: The term is being revised to match what is used in the code.



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The definition is not needed as the term is defined in dictionaries. One dictionary has the following definition of gas range:

a large cooking stove in which the combustion of gas is used as the source of heat

In addition the definition is confusing, as it excludes ranges not designed specifically for domestic use. It implies that a gas restaurant range is not a gas range. As the term is used only in 9.8.6 in the list of appliances not equipped with a sediment trap, an installer could reasonably conclude that restaurant gas ranges are not required to be equipped with a sediment trap.







Affiliation: None

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Statement: The definition is not needed as the term is defined in dictionaries.



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The term is not used in the Code, and therefore should not be defined in the Code.




Affiliation: None

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Committee:

Committee Statement


Statement: Revising the term to match what is used in the code.



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Affiliation: None

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Submittal Date: Thu Feb 08 10:01:36 EST 2018

Committee:

Committee Statement


Statement: Updating term to match what is used in the code.



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Public Input No. 76-NFPA 54-2018 [ New Section after 3.3.6 ]

3.3.x.x Atmospheric Vent: a line that conveys (vents or bleeds) gas to the outdoors from theatmospheric side of a diaphragm of a gas control or device .

3.3. x.x Flue Gas Vent : a line that conveys the products of combustion o f an appliance to theoutdoors .

3.3 x.x discharge stack : a line that conveys the release of gas from the oulet side of a pressurerelief valve to the outdoors .


Proposed definition of terms to clarify the different meanings of vents.


Submitter Full Name: Kevin Carlisle

Organization: Karl Dungs Inc

Street Address:

City:

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Zip:

Submittal Date: Wed May 23 10:54:01 EDT 2018

Committee:

Committee Statement

Resolution: These terms are not used in the code and definitions are not needed.



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TITLE OF NEW CONTENT

Type your content here ... 3.3.34 Engineering methods . Design methods which rely on the application ofmathematics, sciences, empirical evidence and regulation for the selection and arrangement of componentsthat will safely and effectively fulfill the stated requirements.


A new definition is proposed to clarify what an engineering method is. The term has been used in the Code for a number of years, and there have been different interpretations of who can perform designs using an engineering method. The results of some engineering calculations can be summarized in tables, and graphs, or automated in software. Examples of these calculations include the pipe sizing and venting tables included in this Code which summarize the results in a format that can be used by a qualified agency.




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Committee Statement


Statement: The term "engineering method" has been used in the Code for a number of years, and there havebeen different interpretations of who can perform designs using an engineering method. The resultsof some engineering calculations can be summarized in tables, and graphs, or automated in software.Examples of these calculations include the pipe sizing and venting tables included in this Code whichsummarize the results in a format that can be used by a qualified agency.



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3.3.49 Gases.

Include natural gas, manufactured gas, liquefied petroleum (LP) gas in the vapor phase only, liquefiedpetroleum gas–air mixtures, biogases (including landfill gas, wastewater digester gas, and agriculturaldigester gas) and mixtures of these gases, plus gas–air mixtures within the flammable range, with the fuelgas or the flammable component of a mixture being a commercially distributed product.

3.3.49.1 Flue Gases.

Products of combustion plus excess air in appliance flues or heat exchangers.

3.3.49.2 Utility Gases.

Natural gas, manufactured gas, liquefied petroleum gas–air mixtures, or mixtures of any of these gases.

3.3.49.3 Vent Gases.

Products of combustion from appliances plus excess air, plus dilution air in the venting system above thedraft hood or draft regulator.


The proposal is intended to clarify that the National Fuel Gas Code, NFPA 54/ANSI Z223.1, includes fuel gases from landfills, wastewater digesters and agricultural digesters. Both the Standard for Ovens and Furnaces, NFPA 86, and the Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, NFPA 37, reference NFPA 45/ANSI Z223.1, and both standards allow for the use of biogas.



Public Input No. 133-NFPA 54-2018 [SectionNo. 2.3.3]

Public Input No. 133 includes ANSI/CSA B149.6-15 as areference standard in the code.

Public Input No. 196-NFPA 54-2018 [NewSection after A.3.3.5.11.1]




Street Address:

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Submittal Date: Mon Jun 25 15:08:44 EDT 2018

Committee:

Committee Statement

Resolution: There are currently no requirements in the code for biogases, which are significantly different thanother gases within NFPA 54.



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3.3.56 Heater.

3.3.56.1 Nonrecirculating Direct Gas-Fired Nonrecirculating Industrial Air Heater fired Heating and ForcedVentilation Appliances for Commerical and Industrial Application .

A nonrecirculating industrial air heater direct gas-fired heating and forced ventilation appliance forcommercial and industrial application in which all the products of combustion generated by the applianceare released into the outdoor airstream being heated.

3.3.56.2 Recirculating Direct Gas-Fired Recirculating Industrial Air Heater.

An air recirculating heater

fired Heating and Forced Ventilation Appliances for Commerical and Industrial Application.

A recirculating direct gas-fired heating and forced ventilation appliance for commercial and industrialapplication in which all of the products of combustion generated by the appliance are released into theairstream being heated.

3.3.56.3 Infrared Heater.

A heater that directs a substantial amount of its energy output in the form of infrared energy into the area tobe heated. Such heaters may be of either the vented or unvented type.

3.3.56.4 Pool Heater.

An appliance designed for heating nonpotable water stored at atmospheric pressure, such as water inswimming pools, therapeutic pools, and similar applications.

3.3.56.5 Unit Heater.

A self-contained, automatically controlled, vented, fuel gas–burning, space-heating appliance intended forinstallation in the space to be heated without the use of ducts, having integral means for circulation of air.

3.3.56.6 Unvented Room Heater.

An unvented, self-contained, freestanding, nonrecessed, fuel gas–burning appliance for furnishing warm airby gravity or fan circulation to the space in which installed, directly from the heater without duct connection.

3.3.56.7 Water Heater.

An appliance for supplying hot water for domestic or commercial purposes.


Editorial correction to use the current titles and definitions of these appliances from the ANSI Z83.4/CSA 3.7 and ANSI Z83.18 standards, respectively.



Public Input No. 133-NFPA 54-2018[Section No. 2.3.3]

Public Input #133 includes proposal t o update the standards to thecurrent name and edition date.




Street Address:

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Committee:

Committee Statement


Statement: Editorial correction to use the current titles and definitions of these appliances from the ANSIZ83.4/CSA 3.7 and ANSI Z83.18 standards, respectively.


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3.3.72 Oven, Gas Baking and Roasting.

See 3.3.5.5.1 , Baking and Roasting Gas Oven.


The term is not used in the Code, except for 2 definitions.



Public Input No. 6-NFPA 54-2018 [Section No. 3.3.5.5.1] Same subject




Affiliation: None

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Committee:

Committee Statement


Statement: The term is being revised to match what is used in the code.



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3.3.78 Point of Delivery. The location point where the customer owned fuel gas piping begins.

3.3.78.1 Natural Gas. The outlet of the service meter assembly or the outlet of the service regulator orservice shutoff valve where no meter is provided.

3.3.78.2 Undiluted Liquefied Petroleum Gas. The outlet of the final pressure regulator, exclusive of linegas regulators, where no meter is installed. Where a meter is installed, the point of delivery shall be theoutlet of the meter.


The point of delivery term is used in many locations within the code but there is not definition provided. The term is defined in scoping section 1.1.1.1 (A) which may be overlooked or hard to find by code users. The change would improve the code’s clarity.



Public Input No. 88-NFPA 54-2018 [Section No. 1.1.1.1(A)]




Street Address:

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Committee:

Committee Statement


Statement: The point of delivery term is used in many locations within the code but there was no definitionprovided. The term is defined in scoping section 1.1.1.1 (A) which may be overlooked or hard to findby code users. The change would improve the code’s clarity.



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3.3.78 Pressure.

Unless otherwise stated, a measurement expressed in pounds per square inch above atmosphericpressure.

3.3.78.1 Atmospheric Pressure.

The pressure of the weight of air on the surface of the earth, approximately 14.7 pounds per square inch(psia) (101 kPa absolute) at sea level.

3.3.78.2 Back Pressure.

Pressure against which a fluid is flowing, resulting from friction in lines, restrictions in pipes or valves,pressure in vessel to which fluid is flowing, hydrostatic head, or other impediment that causes resistance tofluid flow.

3.3.78.3 Design Pressure.

The maximum operating pressure permitted by this code, as determined by the design proceduresapplicable to the materials involved.

3.3.78.4 Maximum Working Pressure.

The maximum pressure at which a piping system can be operated in accordance with the provisions of thiscode.

Add two more definitions

3.3.78.5 Supply pressure : The gas pressure measured at the inlet of the Appliance Shutoff Valve.

3.3. 78. 6 delivery pressure; The outlet pressure of the service regulator, or if no service regulator than theoutlet of the Service Meter Assembly.


supply pressure and delivery pressure are two phrased used in NFPA 54, and I thought it would be good to define these since the two can be misconstrued.




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Statement: The term supply pressure is used throughout the document and a definition is appropriate.



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3.3.81 Qualified Agency.

Any individual, firm, corporation, or company that either in person or through a representative is engaged inand is responsible for (1) the design, installation, testing, or replacement of gas piping or (2) theconnection, installation, testing, repair, or servicing of appliances and equipment; that is experienced insuch work; that is familiar with all precautions required; and that has complied with all the requirements ofthe authority having jurisdiction.


The proposed addition does not change the meaning or intent of the definition but further clarifies the stages of a project that must comply with the code. (See proposal for section 4.1)





Submitter Full Name: Matthew Wilber


Street Address:

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Committee:

Committee Statement


Statement: The revision does not change the meaning or intent of the definition but further clarifies the stages ofa project that must comply with the code.



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3.3.82 Range.

See 3.3.5.5.4 , Gas Range.


See PI-8.







Affiliation: None

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Committee:

Committee Statement


Statement: The definition is not needed as the term is defined in dictionaries.



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3.3.88 Service Meter Assembly.

The meter, valves, piping, fittings, and fittings equipment installed by the serving gas supplier to connectthe inlet side of the meter to the gas service and to connect the outlet side of the meter to the gas supplyto the customer’s house or yard piping.


To clarify that the assembly includes the meter as well as any piping, valves, fittings, and equipment installed by the gas supplier and that such piping, valves, fittings, and equipment can be on the inlet and outlet of the actual meter.




Street Address:

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Committee:

Committee Statement


Statement: This definition is revised to clarify that the assembly includes the meter as well as any piping, valves,fittings, and equipment installed by the gas supplier and that such piping, valves, fittings, andequipment can be on the inlet and outlet of the actual meter.



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3.3.92 Steam Cooker.

See 3.3.5.5.5 , Gas Steam Cooker.


The term is self defining, and a definition is not needed.




Affiliation: None

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Committee:

Committee Statement


Statement: Revising the term to match what is used in the code.



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3.3.93 Steam Generator.

See 3.3.5.5.6 , Gas Steam Generator.


The term "steam generator" is used only in 2 definitions and in 10.12.1 Clearance for Listed Appliances, which applies to floor mounted food service appliances. As the term is self defining, a definition is not needed.




Affiliation: None

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Committee:

Committee Statement


Statement: Updating term to match what is used in the code.



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3.3.95.7.1 Forced Mechanical Draft Venting System.

A venting system in which a fan or other mechanical device is used to cause the flow of flue or vent gasesunder positive vent pressure.






Affiliation: None

Street Address:

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Committee:

Committee Statement


Statement: The term is not used in the Code, and therefore should not be defined in the Code. Also redundantdefinition.



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3.3.97 Thread Joint Compounds.

Nonhardening materials used on pipe threads to ensure a seal.


The term is used only in 5.6.6.4. The definition is deleted and 5.6.6.4 is proposed to be revised in a separate proposal to indlude the definition.







Affiliation: None

Street Address:

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Committee:

Committee Statement


Statement: The term is used only in 5.6.6.4. The definition is deleted and 5.6.6.4 is revised in a separate revisionto include the definition.



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Public Input No. 18-NFPA 54-2018 [ Section No. 3.3.99 [Excluding any Sub-Sections] ]

A device used in piping to control the gas supply to any section of a system of piping or to an appliance.


The definition of "valve" is not needed as there are 9 definitions of the different types of valves. Also as used in the Code the dictionary definition is more than adequate.




Affiliation: None

Street Address:

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Committee:

Committee Statement


Statement: The definition of "valve" is not needed as there are 9 definitions of the different types of valves. Alsoas used in the Code the dictionary definition is more than adequate.



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3.3.99.1 Appliance Shutoff Valve.

A valve located in the piping system used to shut off the fuel gas to the individual equipment.


The valve does not shut off equipment but does shut off the fuel gas to the equipment. Many common gas appliances have both a gas and an electric supply. The existing definition implies that both the gas and electric supply is shut off by the use of the gas valve.



Public Input No. 95-NFPA 54-2018 [Section No. 3.3.99.6] Same change is being requested.





Street Address:

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Committee:

Committee Statement


Statement: The valve does not shut off an appliance but does shut off the fuel gas to the appliance. Manycommon gas appliances have both a gas and an electric supply. The existing definition implies thatboth the gas and electric supply is shut off by the use of the gas valve. "Located in the piping system"was removed because it was redundant and unnecessary.



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Public Input No. 93-NFPA 54-2018 [ New Section after 3.3.99.6 ]

3.3.99.7 System Shutoff Valve.

A valve installed after the point of delivery to shut off the fuel gas to the entire piping system.


dd a new definition for main shutoff valves since that term is used in section 7.8.2.1. The new definition is also needed to define the term for new section 7.8.2.5. For many years, the natural gas utility’s service shutoff valve has been used to serve as a building owner’s maintenance valve and the emergency shutoff valve, especially in many single and double family buildings and other light commercial locations. Federal regulations now require that these valves be operated only by a qualified person. Home owners and other members of the public are not considered to be a qualified person and therefore they should not operate the service shutoff valve. In response to this, some gas utilities have begun to install a second whole building shutoff valve after the point of delivery. New section 7.8.2.5 provide coverage for these valves.



Public Input No. 92-NFPA 54-2018 [Section No. 7.8.2.1] New definition for section changes.

Public Input No. 91-NFPA 54-2018 [New Section after 7.8.2.4] New definition for section changes






Street Address:

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Committee:

Committee Statement


Statement: Add a new definition for system shutoff valves since that term is used in section 7.8.1.1 (formerlycalled main shutoff valve). The new definition is also needed to define the term for new section 7.8.4.The natural gas utility’s service shutoff valve has been used to serve as a building owner’smaintenance valve and the emergency shutoff valve, especially in many single and double familybuildings and other light commercial locations. Federal regulations now require that these valves beoperated only by a qualified person. Home owners and other members of the public are notconsidered to be a qualified person and therefore they should not operate the service shutoff valve. Inresponse to this, some gas utilities have begun to install a second whole building shutoff valve afterthe point of delivery. New section 7.8.4 provide coverage for these valves.



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3.3.99.6 Service Shutoff Valve.

A valve, installed by the serving gas supplier between the service meter or source of supply and thecustomer piping system, to shut off the fuel gas to the entire piping system.


The valve does not shut off the piping but does shut off the fuel gas entering the piping.



Public Input No. 94-NFPA 54-2018 [Section No. 3.3.99.1] Same change being requested.





Street Address:

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Committee:

Committee Statement


Statement: The valve does not shut off the piping but does shut off the fuel gas entering the piping. "Servicemeter" was removed because this valve could be before the meter.



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Public Input No. 131-NFPA 54-2018 [ New Section after 4.1 ]

4.2 Personnel performing installation, operation, and maintenance work shall be trained in such functions,and the training shall be documented.


Text is proposed to provide specific training requirements for the Qualified Agency. This is needed as there have been failures in venting systems due to improper installation of plastic venting systems. Such failures can lead to carbon monoxide release.




Affiliation: IPEX USA LLC

Street Address:

City:

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Zip:

Submittal Date: Fri Jun 22 14:36:22 EDT 2018

Committee:

Committee Statement

Resolution: The material proposed is redundant with the definition of qualified agency.



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4.1 Qualified Agency.

Installation Design , installation, testing, purging, and replacement of gas piping, appliances, oraccessories, and repair and servicing of equipment, shall be performed only by a qualified agency.


The proposed change does not change the intent of section 4.1 but further clarifies the stages of a project that must be performed by a Qualified Agency. (See proposal for section 3.3.81)



Public Input No. 180-NFPA 54-2018 [Section No. 3.3.81] Terminology


Submitter Full Name: Matthew Wilber


Street Address:

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Committee:

Committee Statement


Statement: This change is a result of a revision to the definition under FR 69. Also this revision improvesgrammar.



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4.3.2.1 Drip Liquids.

Liquid that is removed from a drip in existing gas piping shall be handled to avoid spillage or ignition. Thegas supplier shall be notified when drip liquids are removed.


Notification of the gas supplier of drip liquids is not a safety issue and should not be in the Code.




Affiliation: None

Street Address:

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Committee:

Committee Statement


Statement: Removal of drip liquids does not always require notifying the gas supplier because liquids canaccumulate for a variety of reasons that may not impede the performance of the appliances orequipment. Annex material was added for guidance.



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TITLE OF NEW CONTENT

4.5 Engineering Methods. Where an engineering method, is used to calculate flow of air or gas, or todetermine the size of gas pipe or a gas vent, the Authority Having Jurisdiction shall have the authority torequire submittal of the following:

4.5.1 Calculations including documentation that the method used is published and recognized as beingvalid for the calculations provided.

4.5.2 The name of any software used, input and output developed and documentation that the software isrecognized as being valid for the calculations provided.

4.5.3* Engineering calculations and design can be performed by a qualified agency. The calculation ordesign should include the name and signature of the person who performed the calculation or design, alongwith their qualifications to perform the calculation or design.

A.4.5.3 The person performing the calculation or design may be:

1. A registered/licensed professional engineer, with their stamp or registration/license number and State ofregistration/license.

2. A degreed engineer who is not registered/licensed.

3. Anyone who has experience in using the calculation method, along with a statement of their experience.


This proposed section clarifies what an engineering method and who can use such method. This codifies what has been allowed in the Code for decades, the use of pipe and vent sizing tables which are used by designers and Authorities Having Jurisdiction. It also will require the person submitting the calculation to provide their qualifications on the method used.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: This revision clarifies what an engineering method is and who can use such method. This codifieswhat has been allowed in the Code for decades, the use of pipe and vent sizing tables which areused by designers and Authorities Having Jurisdiction. It also will require the person submitting thecalculation to provide their qualifications on the method used.



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5.2 Provision for Location of the Point of Delivery.

The location of the point of delivery shall be acceptable to the serving gas supplier.


Editorial change to remove unnecessary words.




Affiliation: None

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Committee:

Committee Statement


Statement: This requirement is outside the scope of this code.



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5.3.1 Interconnections Supplying Separate Users.

Where two or more meters, or two or more service regulators where meters are not provided, are locatedon the same premises and supply separate users, the gas piping systems shall not be interconnected onthe outlet side of the meters or service regulators except when part of an engineered system .


To clarify that the requirement applies broadly and includes one customer that may have two services with differing delivery pressures. We have become aware that one industrial account had two separate meters delivering different pressures but the piping systems were interconnected a several points (valves were installed at interconnections). The “user” in the current code requirement can be interpreted as a “customer” and therefore would not be required to separate the two gas systems. The revision also recognizes that a system engineered to be interconnected is allowed.




Street Address:

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Committee:

Committee Statement

Resolution: While the proposed language may have merit, the change would eliminate the focus of theparagraph. As revised, this fails to address separate customers or users. The proposed revisionchanges the intent and no longer would address separate users.



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5.4.3* Sizing Methods.

Gas piping shall be sized in accordance with one of the following:


(2) Other approved engineering methods



The work "other" implies an alternate. As a list of options, all 3 options are equally acceptable and there is no need to include "other".




Affiliation: None

Street Address:

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State:

Zip:


Committee:

Committee Statement


Statement: The word "other" implies an alternate. As a list of options, all 3 options are equally acceptable andthere is no need to include "other". The options have been reordered to reflect industry practice.



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5.4.4 Allowable Pressure Drop.

The design pressure loss in any a piping system under maximum probable flow conditions, from the pointof delivery to the inlet connection of the appliance, all appliances served shall be such that the supplypressure at the each appliance inlet is greater than or equal to the minimum pressure required by theappliance.


Sections 5.4.2.1 and 5.4.2.3 already state that the piping is designed based on the total connected load. This assumes that all appliances are firing at maximum input. The phrase “under maximum probable flow conditions” is unclear and undefined. There is no reason to clarify it because the other code sections already spell out the intent. The unclear phrase can simply be deleted. As revised, 5.4.4 says that each appliance served must see it’s required minimum inlet pressure, and any excess pressure can be lost in pipe friction in the pipe sizing method used.




Street Address:

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Zip:


Committee:

Committee Statement


Statement: Sections 5.4.2.1 and 5.4.2.3 already state that the piping is designed based on the total connectedload. This assumes that all appliances are firing at maximum input. The phrase “under maximumprobable flow conditions” is unclear and undefined. There is no reason to clarify it because the othercode sections already spell out the intent. The unclear phrase was replaced with maximum demandwhich is specified above. As revised, 5.4.4 says that each appliance served must see it’s requiredminimum inlet pressure, and any excess pressure can be lost in pipe friction in the pipe sizing methodused.



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5.5.4 Maximum Operating Pressure in Buildings.

The maximum operating pressure for any piping systems located inside buildings shall not exceed 5 psi(34 kPa) unless one or more of the following conditions are met:

(1)

(2) The piping joints are flanged and all pipe-to-flange connections are made by welding or brazing.

(3) The piping is located in a ventilated chase or otherwise enclosed for protection against accidental gasaccumulation.

(4) The piping is located inside buildings or separate areas of buildings used exclusively for one of thefollowing:

(5) Industrial processing or heating

(6) Research

(7) Warehousing

(8) Boiler or mechanical rooms

(9) The piping is a temporary installation for buildings under construction.

(10) The piping serves appliances or equipment used for agricultural purposes.

(11) The piping system is an LP-Gas piping system with an operating pressure greater than 20 psi(138 kPa) and complies with NFPA 58.


Press-Connect fittings listed to ANSI LC4 are listed for up to 125 psi fuel gas systems. This proposed revision includes and additional joining method for systems over 5 PSI inside buildings.

ANSI LC 4-2012 CSA 6.32-2012Press-connect metallic fittings foruse in fuel gas distribution systems1 Scope1.1This standard applies to metallic (copper, steel and stainless steel) press-connect type fittings, and valves(hereafter referred to as fittings unless otherwise specified) for use with fuel gas systems intended forinstallation above ground, below ground, indoors and outdoors.1.2This standard applies to fuel gas systems rated for operating pressures not exceeding 125 psi (862 kPa).1.3This standard applies to fittings intended for use with fuel gas systems 3/8 inch through 4 inch nominalsize.1.4If a value for measurement as given in this standard is followed by an equivalent value in other units, thefirst stated value is to be regarded as the specification. This document is based on yard/pound quantitieswith SI equivalents provided as a guide for making metric conversions.1.5Fittings and other components complying with the provisions of this standard shall be considered ashaving an ambient temperature range of minus 40°F (–40 °C) to 180°F (82.2°C).1.6This standard includes requirements to establish the suitability for use in concealed locations. (SeeClause 3, Definitions)


* The piping joints are welded or brazed. are welded, brazed or joined by Press-Connect fittings listedto ANSI LC4/CSA 6.32 and installed according to the Manufactuer's installaton instructions.


Submitter Full Name: Mark Fasel

Organization: Viega LLC

City:

ZipStat

:

Submittal Date: Fri Mar 02 12:21:51 EST 2018

CommiStreet Attee Sddress:tatement

ReState:

solution: FR-12-NFPA 54-2018

ement: Press-Connect fittings listed to ANSI LC4 are listed for up to 125 psi fuel gas systems. This revisionincludes an additional joining method for systems over 5 PSI inside buildings.


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5.6* Acceptable Piping Materials and Joining Methods.



1.. The title is revised by del ing "Acceptable" which is not needed.2.. 5.6.1.3 is revi d to clarify the intent of the committee. Only one of the 3 criteria is needed to allow use of thematerial.



TLemoff EngineeringOrganization:

Affiliation: None

Thu Feb 08 11:54:17 EST 2018

Street Address:

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Zip:

Submittal Date:

Committee:

Committee Statement


Statement: "Acceptable" is not needed in this title.


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5.6.6.4* Thread Joint Compounds Sealing Material .

Thread joint compounds sealing materials shall be non-hardining and shall be resistant to the action ofLP-Gas or to any other chemical constituents of the gases to be conducted through the piping.


The text is revised to define the materail in the requirement and no longer need a definition.







Affiliation: None

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Committee:

Committee Statement


Statement: The text is revised to define the material in the requirement and no longer need a definition in Chapter3. The specific mention of LP-gas was removed as the requirement is applicable to all fuel gases. Inaddition, the code did not previously require the use of sealing materials, so a requirement has beenadded to reflect industry practice.



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5.8.2 Listing.

Line pressure regulators shall be listed in accordance with ANSI Z21.80/CSA 6.22, Line PressureRegulators, where the outlet pressure is set to 2 psi or less. Gas appliance pressure regulators shall belisted in accordance with ANSI Z21.18/CSA 6.3, Gas Appliance Pressure Regulators .


This proposal is intended to require the appliance to be listed, as defined in Section 3.2.5 of the Code, to the applicable American National Standard by an organization acceptable to the code official.



Public Input No. 133-NFPA54-2018 [Section No. 2.3.3]

Public Input #133 includes reference to the applicable AmericanNational Standard for inclusion in the body of the code.




Street Address:

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Committee:

Committee Statement

Resolution: Section 5.8 covers line pressure regulators, so a listing requirement for gas appliance pressureregulators should not be located here.



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5.8.5 Venting of Line Pressure Regulators .

5.8.5.1 Line Pressure Regulators.


(1) An independent vent to the exterior of the building, sized in accordance with the regulatormanufacturer’s instructions, shall be provided where the location of a regulator is such that a ruptureddiaphragm will cause a hazard.

(2) Where more than one regulator is at a location, each regulator shall have a separate vent to theoutdoors or, if approved by the authority having jurisdiction, the vent lines shall be permitted to bemanifolded in accordance with accepted engineering practices to minimize back pressure in theevent of diaphragm failure.

(3) Materials for vent piping shall be in accordance with Section 5.6 .

Exception: A regulator and vent limiting means combination listed as complying with ANSIZ21.80/CSA 6.22, Line Pressure Regulators, shall be permitted to be used without a vent to theoutdoors.

(4) The vent shall be designed to prevent the entry of water, insects, or other foreign materials that couldcause blockage.


(6) At locations where regulators might be submerged during floods, a special antiflood-type breather ventfitting shall be installed, or the vent line shall be extended above the height of the expected floodwaters.



For venting of gas appliance pressure regulators, see 9.1.19.


I found students and technicians get confused with the language with the type of vent being introduced in the section.


Submitter Full Name: Thomas Denoi

Organization:

Affiliation: Member

Street Address:

City:

State:

Zip:

Submittal Date: Thu Jan 25 17:11:54 EST 2018

Committee:

Committee Statement



Statement: The code had addressed venting of pressure control devices in several sections. These sectionswere not coordinated and did not address the required issues consistently or completely. Thedistance discharge requirements for higher pressure discharges (2 psi and above) was also notconsistent with requirements for purging in Section 8.3.


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5.8.5 Atmospheric Venting.

5.8.5.1 Line Pressure Regulators.


(1) An independent vent to the exterior of the building, sized in accordance with the regulatormanufacturer’s instructions, shall be provided where the location of a regulator is such that a ruptureddiaphragm will cause a hazard.

(2) Where more than one regulator is at a location, each regulator shall have a separate vent to theoutdoors or, if approved by the authority having jurisdiction, the vent lines shall be permitted to bemanifolded in accordance with accepted engineering practices to minimize back pressure in theevent of diaphragm failure.

(3) Materials for vent piping shall be in accordance with Section 5.6 .

Exception: A regulator and vent limiting means combination listed as complying with ANSIZ21.80/CSA 6.22, Line Pressure Regulators, shall be permitted to be used without a vent to theoutdoors.

(4) The vent shall be designed to prevent the entry of water, insects, or other foreign materials that couldcause blockage.


(6) At locations where regulators might be submerged during floods, a special antiflood-type breather ventfitting shall be installed, or the vent line shall be extended above the height of the expected floodwaters.



For atmospheric venting of gas appliance pressure regulators, see 9.1.19.


The term venting has different meanings for gas appliances. There is venting of gas leakage from controls, the venting of gas from a relief valve during an overpressure condition, and venting of products of combustion from appliances. The proposed change clarifies what kind of venting is the scope of this section




Street Address:

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For venting of gas appliance pressure regulators , see shall be in accordance with 9.1.19.


The paragraph does not include a requirement. I beleive it should be deleted, but an option is to relocate it to Annex A.

2.3.3.1 Where a sentence in a code or standard does not contain a mandatory requirement, it shall be rewritten to include a mandatory requirement or the sentence shall be moved to Annex A or deleted.




Affiliation: None

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5.8.6 Bypass Piping.

Valved and regulated bypasses shall be permitted to be placed around gas line pressure regulators wherecontinuity of service is imperative.


The paragraph is not needed. It allows a bypass which is not prohibited by the code. If this option is sufficiently important it should be included in the Annex.




Affiliation: None

Street Address:

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Committee:

Committee Statement


Statement: The paragraph is not needed. It allows a bypass which is not prohibited by the code.



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5.9.1 Where Required.

Where the serving gas supplier delivers gas at a pressure greater than 2 psi (14 kPa) for piping systemsserving appliances Overpressure protection shall be provided to an appliance in the following cases

For any appliance designed to operate at a gas supply pressure of 14 in 14 in . w.c. (3.4 kPa)or less,overpressure protection devices shall be installed. Piping systems serving equipment or less and thedeliver pressure is greater than 2 psi.

For any appliance designed to operate at inlet pressures a supply pressure greater than 14 in 14 in . w.c.(3.4 kPa) shall be equipped with overpressure protection devices then as required by the applicableinstallation standard or appliance manufacturer’s installation instructions.


Tried to rearrange existing requirement so it is easier to read. Also, there are appliance standards (NFPA 85, NPFA 86) that now address overpressure protection for the gas train. So language is added to reference the requirements of these standards.




Street Address:

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Committee:

Committee Statement

Resolution: The existing language is clear, and the proposed change removes language that is necessary forclarity.



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5.9.2.2

Where piping systems serving appliances designed to operate with a gas supply pressure greater than14 in. w.c. (3.4 kPa) are required to be equipped with overpressure protection by 5.9.1, each overpressureprotection device shall be adjusted to limit the gas pressure to each connected appliance as required by theapplicable appliance standard or by the appliance manufacturer’s installation instructions.


There are appliance standards (NFPA 85, NPFA 86) that now address overpressure protection for the gas train, so language is added to reference the requirements of these standards.




Street Address:

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Committee:

Committee Statement

Resolution: A reference of applicable appliance standards is vague. The NFPA standards referenced in thesubstantiation are outside the scope of NFPA 54 as the gas train is downstream of the applianceshutoff valve.



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Add section on atmospheric venting or add to Annex

Do not use excessive fittings or long pipe runs.

Keep elbows to an absolute minimum

Never reduce the vent pipe size

Do not apply a bending moment on the vent line, if rigid pipe is used. This can apply a large bending force

(a severe stress) to the vent connection and damage the valve.

Apply proper hangers and supports so that the vent line connection is not loaded with the weight of the

vent piping or a bending moment of the vent line.

Do not combine or connect other vents from other devices

Vent Line’s Point of Termination

1. If a vent line runs through a roof, verify that the vent line terminates above the point where water and

snow accumulation does not cover or isolate the termination point from the atmosphere.

2. To limit the consequences of rain or debris getting into the vent, always turn the outlet of the vent down

towards the ground.

Bug Screens

1) Bugs are attracted to the smell of the natural/LP gas odorant and will nest in the vent line, which will

further reduce tack effect or will completely seal the termination point. Install a bug screen on the

termination point to deter insects from nesting in the line

2) Do not paint over the bug screen.

Points of Discharge

1) The vent line must discharge away from where people might be or work, such as roofers and

other maintenance professionals.

2) The vent line must discharge away from fresh air intakes and from windows.


I thought it would be good to have a section on atmospheric venting. of controls. This also could be annex information.




Street Address:

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Zip:

Submittal Date:Wed May 23 11:53:21 EDT 2018

Committee:

Committee Statement




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5.9.8 Vents. Discharge Stacks and Atmospheric Vents for Overpressure Protection Devices

5.9.8.1

The discharge stacks , vents, or and outlet parts of all pressure relieving and pressure limiting reliefvalves and the atmospheric vents from all overpressure protection devices shall be located so that gas issafely discharged to the outdoors. Discharge stacks or vents shall be designed to prevent the entry ofwater, insects, or other foreign material that could cause blockage.

5.9.8.2

The Except for a token relief valve, the discharge stack or vent line shall be at least the same size as theoutlet of the pressure relieving device. relief valve.

5.9.8.3

The atmospheric vent line from any overpressure protection device shall be the same size as vent lineconnection.

5.9.8.4

The point of termination of discharge stacks or atmospheric vents from overpressure protection devicesshall be designed to prevent the entry of water, insects, or other foreign material that could causeblockage.


The term venting has different meanings for gas appliances. There is venting of gas leakage from controls, the venting of gas from a relief valve during an overpressure condition, and venting of products of combustion from appliances. The proposed change clarifies what kind of venting is the scope of this section.

Tt should be clear that it this section also applies to atmospheric vent connection of all overpressure protection devices.

Pressure relief valve is defined, pressure limiting and relieving device is broadly defined to include monitor regulators. The current language implies that the outlet of a monitor regulator "shall be located so that gas is safely discharged to the outdoors", and that is not the intended meaning.




Street Address:

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Committee:

Committee Statement

Resolution: The language proposed provides no improvement over the existing text. The term "token relief valve"is undefined and some of the new text is redundant.



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5.12 Shutoff Valves.

Shutoff valves shall be approved and shall be selected giving consideration to selected in accordance withTable 5.12 considering pressure drop, service involved, emergency use, and reliability of operation. Shutoffvalves of size 1 in. (25 mm) National Pipe Thread and smaller shall be listed.

Table 5.12 Manual Gas Valve Standards

Valve Use Pressure Meeting on of the Following Standards

Appliance ≤ ½ psi ANSI Z21.15/CGA 9.1 or ASME B16.44 or ASME B16.33

Piping ≤ ½ psi ASME B16.44 or ASME B16.33

Piping ≤ 2 psi ASME B16.44 (labeled 2G) or ASME B16.33

Piping ≤ 5 psi ASME B16.44 (labeled 5G) or ASME B16.33

Piping ≤ 125 psi ASME B16.33


Provide code users with a valve selection table based on available and acceptable valve standards. The table will help ensure the appropriate valve is selected for the intended application. The valves selection table is similar to one printed in the 2018 International Fuel Gas Code.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: This revision provides code users with a valve selection table based on available and acceptablevalve standards. The table will help ensure the appropriate valve is selected for the intendedapplication. The requirement to be labeled has been added to facilitate inspection and to identify thatthe device complies with a standard.



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5.13 Excess Flow Valve(s).

Where automatic excess flow valves are installed, they shall be listed to in accordance with ANSIZ21.93/CSA 6.30, Excess Flow Valves for Natural and LP-Gas with Pressures Up to 5 psig, and shall besized and installed in accordance with the manufacturers' instructions.


Editorial change to use consistent language in the code when requiring appliances or components to be listed to a specific standard.




Street Address:

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Zip:


Committee:

Committee Statement


Statement: Editorial change to use consistent language in the code when requiring appliances or components tobe listed to a specific standard.

National Fire Protection Association Report https://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPar...ATTACHMENT F - Report on Public Input


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Affiliation: Omega Flex

Street Address:

City:

State:

Zip:

Submittal Date: Fri Mar 23 15:57:01 EDT 2018

Committee:

Committee Statement

Resolution: The addition of inch dimensions may create additional confusion since each nominal size isassociated with two flow designations in EHD. Listing standards require the marking of EHD ontubing, not inches.



6.2.1 - See attached MSWord Tables

Additional Proposed Changes


NFPA_54_6.2.1_CSST_tables_from_NFPA_with_inch_line_added.docx


The tables are revised to add nominal inch sizing, in addition to EHD. This is due to different CSST manufacturers offering differently sized products, the Equivalent Hydraulic Diameter (EHD) concept was developed to more accurately describe and compare the flow performance of the various CSST products. Adding the nominal inch size will provide users with another basis for comparing CSST products with standard black iron pipe sizes. This information will be of benefit when installation issues are impacted by the physical size of the piping. These changes have been made to the CSST tables in the 2017 edition of NFPA 58.


RelationshipRelated Input



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Revise Tables 6.2.1 (o), (p), (q), (r), and (s) to read:

Table 6.2.1(o) Corrugated Stainless Steel Tubing (CSST)

Gas: Natural Inlet Pressure: Less than 2 psi Pressure Drop: 0.5 in. w.c.

Specific Gravity: 0.60 Tube Size (Inches/EHD)

Nominal Size 3⁄8 3⁄8 1⁄2 1⁄2 3⁄4 3⁄4 1 1 11⁄4 11⁄4 11⁄2 11⁄2 2 2 Flow Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62

Length (ft) Capacity in Cubic Feet of Gas per Hour 5 46 63 115 134 225 270 471 546 895 1,037 1,790 2,070 3,660 4,140

10 32 44 82 95 161 192 330 383 639 746 1,260 1,470 2,600 2,930

15 25 35 66 77 132 157 267 310 524 615 1,030 1,200 2,140 2,400

20 22 31 58 67 116 137 231 269 456 536 888 1,050 1,850 2,080

25 19 27 52 60 104 122 206 240 409 482 793 936 1,660 1,860

30 18 25 47 55 96 112 188 218 374 442 723 856 1,520 1,700

40 15 21 41 47 83 97 162 188 325 386 625 742 1,320 1,470

50 13 19 37 42 75 87 144 168 292 347 559 665 1,180 1,320

60 12 17 34 38 68 80 131 153 267 318 509 608 1,080 1,200

70 11 16 31 36 63 74 121 141 248 295 471 563 1,000 1,110

80 10 15 29 33 60 69 113 132 232 277 440 527 940 1,040

90 10 14 28 32 57 65 107 125 219 262 415 498 887 983

100 9 13 26 30 54 62 101 118 208 249 393 472 843 933

150 7 10 20 23 42 48 78 91 171 205 320 387 691 762

200 6 9 18 21 38 44 71 82 148 179 277 336 600 661

250 5 8 16 19 34 39 63 74 133 161 247 301 538 591

300 5 7 15 17 32 36 57 67 95 148 226 275 492 540

EHD: Equivalent hydraulic diameter. A measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing. Notes: (1) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and/or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends. (2) All table entries are rounded to 3 significant digits.


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Table 6.2.1(p) Corrugated Stainless Steel Tubing (CSST)

Gas: Natural Inlet

Pressure: Less than 2 psi

Pressure Drop: 3.0 in. w.c.

Specific Gravity: 0.60

INTENDED USE: Initial Supply Pressure of 8.0 in. w.c. or Greater. Tube Size (Inches/EHD)

Nominal Size 3⁄8 3⁄8 1⁄2 1⁄2 3⁄4 3⁄4 1 1 11⁄4 11⁄4 11⁄2 11⁄2 2 2 Flow

Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62 Length (ft) Capacity in Cubic Feet of Gas per Hour

5 120 160 277 327 529 649 1,180 1,370 2,140 2423 4,430 5,010 8,800 10,100

10 83 112 197 231 380 462 828 958 1,530 1740 3,200 3,560 6,270 7,160

15 67 90 161 189 313 379 673 778 1,250 1433 2,540 2,910 5,140 5,850

20 57 78 140 164 273 329 580 672 1,090 1249 2,200 2,530 4,460 5,070

25 51 69 125 147 245 295 518 599 978 1123 1,960 2,270 4,000 4,540

30 46 63 115 134 225 270 471 546 895 1029 1,790 2,070 3,660 4,140

40 39 54 100 116 196 234 407 471 778 897 1,550 1,800 3,180 3,590

50 35 48 89 104 176 210 363 421 698 806 1,380 1,610 2,850 3,210

60 32 44 82 95 161 192 330 383 639 739 1,260 1,470 2,600 2,930

70 29 41 76 88 150 178 306 355 593 686 1,170 1,360 2,420 2,720

80 27 38 71 82 141 167 285 331 555 644 1,090 1,280 2,260 2,540

90 26 36 67 77 133 157 268 311 524 609 1,030 1,200 2,140 2,400

100 24 34 63 73 126 149 254 295 498 579 974 1,140 2,030 2,280

150 19 27 52 60 104 122 206 240 409 477 793 936 1,660 1,860

200 17 23 45 52 91 106 178 207 355 415 686 812 1,440 1,610

250 15 21 40 46 82 95 159 184 319 373 613 728 1,290 1,440

300 13 19 37 42 75 87 144 168 234 342 559 665 1,180 1,320

EHD: Equivalent hydraulic diameter. A measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.

Notes:

(1) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and/or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends.

(2) All table entries are rounded to 3 significant digits.


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Table 6.2.1(q) Corrugated Stainless Steel Tubing (CSST) Gas: Natural

Inlet Pressure: Less than 2 psi Pressure Drop: 6.0 in. w.c.

Specific Gravity: 0.60 INTENDED USE: Initial Supply Pressure of 11.0 in. w.c. or Greater.

Tube Size (Inches/EHD) Nominal

Size 3⁄8 3⁄8 1⁄2 1⁄2 3⁄4 3⁄4 1 1 11⁄4 11⁄4 11⁄2 11⁄2 2 2

Flow Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62 Length (ft) Capacity in Cubic Feet of Gas per Hour

5 173 229 389 461 737 911 1,690 1,950 3,000 3375 6,280 7,050 12,400 14,260

10 120 160 277 327 529 649 1,180 1,370 2,140 2423 4,430 5,010 8,800 10,100

15 96 130 227 267 436 532 960 1,110 1,760 1996 3,610 4,100 7,210 8,260

20 83 112 197 231 380 462 828 958 1,530 1740 3,120 3,560 6,270 7,160

25 74 99 176 207 342 414 739 855 1,370 1564 2,790 3,190 5,620 6,400

30 67 90 161 189 313 379 673 778 1,250 1433 2,540 2,910 5,140 5,850

40 57 78 140 164 273 329 580 672 1,090 1249 2,200 2,530 4,460 5,070

50 51 69 125 147 245 295 518 599 978 1123 1,960 2,270 4,000 4,540

60 46 63 115 134 225 270 471 546 895 1029 1,790 2,070 3,660 4,140

70 42 58 106 124 209 250 435 505 830 956 1,660 1,920 3,390 3,840

80 39 54 100 116 196 234 407 471 778 897 1,550 1,800 3,180 3,590

90 37 51 94 109 185 221 383 444 735 848 1,460 1,700 3,000 3,390

100 35 48 89 104 176 210 363 421 698 806 1,380 1,610 2,850 3,210

150 28 39 73 85 145 172 294 342 573 664 1,130 1,320 2,340 2,630

200 24 34 63 73 126 149 254 295 498 579 974 1,140 2,030 2,280

250 21 30 57 66 114 134 226 263 447 520 870 1,020 1,820 2,040

300 19 27 52 60 104 122 206 240 409 477 793 936 1,660 1,860



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Table 6.2.1(r) Corrugated Stainless Steel Tubing (CSST) Gas: Natural

Inlet Pressure: 2.0 psi Pressure Drop: 1.0 psi


Tube Size (Inches/EHD)

Nominal Size 3∕8 3∕8 1∕2 1∕2 3∕4 3∕4 1 1 11∕4 11∕4 11∕2 11∕2 2 2Flow

Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62 Length (ft) Capacity in Cubic Feet of Gas per Hour

10 270 353 587 700 1,100 1,370 2,590 2,990 4,510 5,037 9,600 10,700 18,600 21,600

25 166 220 374 444 709 876 1,620 1,870 2,890 3,258 6,040 6,780 11,900 13,700

30 151 200 342 405 650 801 1,480 1,700 2,640 2,987 5,510 6,200 10,900 12,500

40 129 172 297 351 567 696 1,270 1,470 2,300 2,605 4,760 5,380 9,440 10,900

50 115 154 266 314 510 624 1,140 1,310 2,060 2,343 4,260 4,820 8,470 9,720

75 93 124 218 257 420 512 922 1,070 1,690 1,932 3,470 3,950 6,940 7,940

80 89 120 211 249 407 496 892 1,030 1,640 1,874 3,360 3,820 6,730 7,690

100 79 107 189 222 366 445 795 920 1,470 1,685 3,000 3,420 6,030 6,880

150 64 87 155 182 302 364 646 748 1,210 1,389 2,440 2,800 4,940 5,620

200 55 75 135 157 263 317 557 645 1,050 1,212 2,110 2,430 4,290 4,870

250 49 67 121 141 236 284 497 576 941 1,090 1,890 2,180 3,850 4,360

300 44 61 110 129 217 260 453 525 862 999 1,720 1,990 3,520 3,980

400 38 52 96 111 189 225 390 453 749 871 1,490 1,730 3,060 3,450

500 34 46 86 100 170 202 348 404 552 783 1,330 1,550 2,740 3,090

EHD: Equivalent hydraulic diameter. A measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing. Notes: (1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 3⁄4 psi, do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary with flow rate. (2) CAUTION: Capacities shown in table may exceed maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer for guidance. (3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger number of bends and/or fittings shall be increased by an equivalent length of tubing according to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends. (4) All table entries are rounded to 3 significant digits.


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Table 6.2.1(s) Corrugated Stainless Steel Tubing (CSST) Gas: Natural Inlet

Pressure: 5.0 psi Pressure

Drop: 3.5 psi Specific Gravity: 0.60

Tube Size (Inches/EHD) Nominal

Size 3⁄8 3⁄8 1⁄2 1⁄2 3⁄4 3⁄4 1 1 11⁄4 11⁄4 11⁄2 11⁄2 2 2

Flow Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62 Length (ft) Capacity in Cubic Feet of Gas per Hour

10 523 674 1,080 1,300 2,000 2,530 4,920 5,660 8,300 9,140 18,100 19,800 34,400 40,400

25 322 420 691 827 1,290 1,620 3,080 3,540 5,310 5,911 11,400 12,600 22,000 25,600

30 292 382 632 755 1,180 1,480 2,800 3,230 4,860 5,420 10,400 11,500 20,100 23,400

40 251 329 549 654 1,030 1,280 2,420 2,790 4,230 4,727 8,970 10,000 17,400 20,200

50 223 293 492 586 926 1,150 2,160 2,490 3,790 4,251 8,020 8,930 15,600 18,100

75 180 238 403 479 763 944 1,750 2,020 3,110 3,506 6,530 7,320 12,800 14,800

80 174 230 391 463 740 915 1,690 1,960 3,020 3,400 6,320 7,090 12,400 14,300

100 154 205 350 415 665 820 1,510 1,740 2,710 3,057 5,650 6,350 11,100 12,800

150 124 166 287 339 548 672 1,230 1,420 2,220 2,521 4,600 5,200 9,130 10,500

200 107 143 249 294 478 584 1,060 1,220 1,930 2,199 3,980 4,510 7,930 9,090

250 95 128 223 263 430 524 945 1,090 1,730 1,977 3,550 4,040 7,110 8,140

300 86 116 204 240 394 479 860 995 1,590 1,813 3,240 3,690 6,500 7,430

400 74 100 177 208 343 416 742 858 1,380 1,581 2,800 3,210 5,650 6,440

500 66 89 159 186 309 373 662 766 1,040 1,422 2,500 2,870 5,060 5,760

EHD: Equivalent hydraulic diameter. A measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing. Notes: (1) Table does not include effect of pressure drop across line regulator. Where regulator loss exceeds 1 psi, do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drop across regulator may vary with the flow rate. (2) CAUTION: Capacities shown in table may exceed maximum capacity of selected regulator. Consult with tubing manufacturer for guidance. (3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and/or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends. (4) All table entries are rounded to 3 significant digits.


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NFPA_54_6.3.1_CSST_tables_from_NFPA_with_inch_line_added.docx


The tables are revised to add nominal inch sizing, in addition to EHD. This is due to different CSST manufacturers offering differently sized products, the Equivalent Hydraulic Diameter (EHD) concept was developed to more accurately describe and compare the flow performance of the various CSST products. Adding the nominal inch size will provide users with another basis for comparing CSST products with standard black iron pipe sizes. This information will be of benefit when installation issues are impacted by the physical size of the piping. These changes have been made to the CSST tables in the 2017 edition of NFPA 58.






6.3.1 - SEE ATTACHED MSWord TABLES

[ Not Specified ]

Omega Flex

Sun Mar 25 09:36:18 EDT 2018

Organization:

Affiliation:

Street Address:

City:

State:

Zip:

Submittal Date:

Committee:

Committee Statement

Resolution: The addition of inch dimensions may create additional confusion since each nominal size isassociated with two flow designations in EHD. Listing standards require the marking of EHD ontubing, not inches.


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Revise Tables 6.3.1 (h), (i), and (j) to read:

Table 6.3.1(h) Corrugated Stainless Steel Tubing (CSST)

Gas: Undiluted Propane

Inlet Pressure: 11.0 in. w.c. Pressure Drop: 0.5 in. w.c.


INTENDED USE: CSST Sizing Between Single- or Second-Stage (Low-Pressure) Regulator and Appliance Shutoff Valve.

Tube Size (Inches/EHD) Nominal Size 3⁄8 3⁄8 1⁄2 1⁄2 3⁄4 3⁄4 1 1 11⁄4 11⁄4 11⁄2 11⁄2 2 2 Nominal Size 3⁄8 3⁄8 1⁄2 1⁄2 3⁄4 3⁄4 1 1 11⁄4 11⁄4 11⁄2 11⁄2 2 2

Flow Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62 Length (ft) Capacity in Thousands of Btu per Hour

5 72 99 181 211 355 426 744 863 1,420 1,638 2,830 3,270 5,780 6,550

10 50 69 129 150 254 303 521 605 971 1,179 1,990 2,320 4,110 4,640

15 39 55 104 121 208 248 422 490 775 972 1,620 1,900 3,370 3,790

20 34 49 91 106 183 216 365 425 661 847 1,400 1,650 2,930 3,290

25 30 42 82 94 164 192 325 379 583 762 1,250 1,480 2,630 2,940

30 28 39 74 87 151 177 297 344 528 698 1,140 1,350 2,400 2,680

40 23 33 64 74 131 153 256 297 449 610 988 1,170 2,090 2,330

50 20 30 58 66 118 137 227 265 397 548 884 1,050 1,870 2,080

60 19 26 53 60 107 126 207 241 359 502 805 961 1,710 1,900

70 17 25 49 57 99 117 191 222 330 466 745 890 1,590 1,760

80 15 23 45 52 94 109 178 208 307 438 696 833 1,490 1,650

90 15 22 44 50 90 102 169 197 286 414 656 787 1,400 1,550

100 14 20 41 47 85 98 159 186 270 393 621 746 1,330 1,480

150 11 15 31 36 66 75 123 143 217 324 506 611 1,090 1,210

200 9 14 28 33 60 69 112 129 183 283 438 531 948 1,050

250 8 12 25 30 53 61 99 117 163 254 390 476 850 934

300 8 11 23 26 50 57 90 107 147 234 357 434 777 854



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Table 6.3.1(i) Corrugated Stainless Steel Tubing (CSST)


Inlet Pressure: 2.0 psi Pressure Drop: 1.0 psi


INTENDED USE: CSST Sizing Between 2 psig Service and Line Pressure Regulator.

Tube Size (Inches/EHD)

Nominal Size

3∕8 3∕8 1∕2 1∕2 3∕4 3∕4 1 1 11∕4 11∕4 11∕2 11∕2 2 2


10 426 558 927 1,110 1,740 2,170 4,100 4,720 7,130 7,958 15,200 16,800 29,400 34,200

25 262 347 591 701 1,120 1,380 2,560 2,950 4,560 5,147 9,550 10,700 18,800 21,700

30 238 316 540 640 1,030 1,270 2,330 2,690 4,180 4,719 8,710 9,790 17,200 19,800

40 203 271 469 554 896 1,100 2,010 2,320 3,630 4,116 7,530 8,500 14,900 17,200

50 181 243 420 496 806 986 1,790 2,070 3,260 3,702 6,730 7,610 13,400 15,400

75 147 196 344 406 663 809 1,460 1,690 2,680 3,053 5,480 6,230 11,000 12,600

80 140 189 333 393 643 768 1,410 1,630 2,590 2,961 5,300 6,040 10,600 12,200

100 124 169 298 350 578 703 1,260 1,450 2,330 2,662 4,740 5,410 9,530 10,900

150 101 137 245 287 477 575 1,020 1,180 1,910 2,195 3,860 4,430 7,810 8,890

200 86 118 213 248 415 501 880 1,020 1,660 1,915 3,340 3,840 6,780 7,710

250 77 105 191 222 373 448 785 910 1,490 1,722 2,980 3,440 6,080 6,900

300 69 96 173 203 343 411 716 829 1,360 1,578 2,720 3,150 5,560 6,300

400 60 82 151 175 298 355 616 716 1,160 1,376 2,350 2,730 4,830 5,460

500 53 72 135 158 268 319 550 638 1,030 1,237 2,100 2,450 4,330 4,880

EHD: Equivalent hydraulic diameter. A measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing. Notes: (1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1⁄2 psi (based on 13 in. w.c. outlet pressure), do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary with flow rate. (2) CAUTION: Capacities shown in table may exceed maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer for guidance. (3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger number of bends and/or fittings shall be increased by an equivalent length of tubing according to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends. (4) All table entries are rounded to 3 significant digits.


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Table 6.3.1(j) Corrugated Stainless Steel Tubing (CSST)


Inlet Pressure: 5.0 psi Pressure

Drop: 3.5 psi Specific Gravity: 1.50

Tube Size (Inches/EHD) Nominal Size

3∕8 3∕8 1∕2 1∕2 3∕4 3∕4 1 1 11∕4 11∕4 11∕2 11∕2 2 2


10 826 1,070 1,710 2,060 3,150 4,000 7,830 8,950 13,100 14,441 28,600 31,200 54,400 63,800

25 509 664 1,090 1,310 2,040 2,550 4,860 5,600 8,400 9,339 18,000 19,900 34,700 40,400

30 461 603 999 1,190 1,870 2,340 4,430 5,100 7,680 8,564 16,400 18,200 31,700 36,900

40 396 520 867 1,030 1,630 2,030 3,820 4,400 6,680 7,469 14,200 15,800 27,600 32,000

50 352 463 777 926 1,460 1,820 3,410 3,930 5,990 6,717 12,700 14,100 24,700 28,600

75 284 376 637 757 1,210 1,490 2,770 3,190 4,920 5,539 10,300 11,600 20,300 23,400

80 275 363 618 731 1,170 1,450 2,680 3,090 4,770 5,372 9,990 11,200 19,600 22,700

100 243 324 553 656 1,050 1,300 2,390 2,760 4,280 4,830 8,930 10,000 17,600 20,300

150 196 262 453 535 866 1,060 1,940 2,240 3,510 3,983 7,270 8,210 14,400 16,600

200 169 226 393 464 755 923 1,680 1,930 3,050 3,474 6,290 7,130 12,500 14,400

250 150 202 352 415 679 828 1,490 1,730 2,740 3,124 5,620 6,390 11,200 12,900

300 136 183 322 379 622 757 1,360 1,570 2,510 2,865 5,120 5,840 10,300 11,700

400 117 158 279 328 542 657 1,170 1,360 2,180 2,498 4,430 5,070 8,920 10,200

500 104 140 251 294 488 589 1,050 1,210 1,950 2,247 3,960 4,540 8,000 9,110

EHD: Equivalent hydraulic diameter. A measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing. Notes: (1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1⁄2 psi (based on 13 in. w.c. outlet pressure), do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary with flow rate. (2) CAUTION: Capacities shown in table may exceed maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer for guidance. (3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger number of bends and/or fittings shall be increased by an equivalent length of tubing according to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends. (4) All table entries are rounded to 3 significant digits.


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7.1.1 Clearances.

Underground metallic gas piping shall be installed with sufficient clearance from any other undergroundstructure to avoid contact therewith, to allow maintenance, and to protect against damage from proximity toother structures. In addition, underground plastic underground polyethylene and polyamide piping shall beinstalled with sufficient clearance or shall be insulated from any source of heat so as to prevent the heatfrom impairing the serviceability of the pipe.


Revised to clearly separate the requirements for metallic pipng and the only 2 plastic piping materials allowed to be used.




Affiliation: None

Street Address:

City:

State:

Zip:

Submittal Date: Mon Feb 12 09:36:06 EST 2018

Committee:

Committee Statement

Resolution: The first part of the section applies to all piping, not just metallic. Polyethylene and polyamide are theonly plastic piping allowed by the code so they do not need to be specified here.



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Public Input No. 99-NFPA 54-2018 [ Section No. 7.1.2.1(B) ]

(B)

Where a minimum of 12 in. (300 mm) of cover cannot be provided, the pipe piping shall be installed inconduit or bridged (shielded).


“Pipe” includes only rigid pipe products such as schedule 40. “Piping” includes both rigid and tubing products. Tubing should be allowed to be installed less than the 12-inch minimum where it is protected.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: “Pipe” includes only rigid pipe products such as schedule 40. “Piping” includes both rigid and tubingproducts. Tubing should be allowed to be installed less than the 12-inch minimum where it isprotected.

In addition, bridge (shielded) was removed because it is too ambiguous. Annex material was added toclarify that conduit is not limited to electrical conduit.



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7.1.3.2

Underground piping shall comply with one or more of the following unless approved technical justification isprovided to demonstrate that protection is unnecessary:

(1) The piping shall be made of corrosion-resistant material that is suitable for the environment in which itwill be installed.

(2) Pipe shall have a factory-applied, electrically insulating coating. Fittings and joints between sections ofcoated pipe shall be coated in accordance with the coating manufacturer’s instructions.

(3) The piping shall have a cathodic protection system installed, and the system shall be maintained inaccordance with 7.1.3.3 or 7.1.3.6

(4) A dielectric fitting shall be installed on metallic piping that conveys fuel gas underground from an LP-gas storage container . The dielectric fitting shall be located outdoors and above ground level beforethe piping enters a building.


Underground piping that runs from an LP-Gas container into a home may be subject to increased corrosive forces where it is not isolated from the aboveground piping systems. Natural Gas Utilities are required by federal regulations to provide such isolate on their systems. The requirement was based on a similar requirement in section 404.10 of the 2018 International Fuel Gas Code.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: Underground piping that runs from an LP-Gas container into a home may be subject to increasedcorrosive forces where it is not isolated from the aboveground piping systems. Natural Gas Utilitiesare required by federal regulations to provide such isolate on their systems. This requirement is alsoconsistent with NFPA 58.



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7.1.5 Piping Through Foundation Wall.

Underground piping, where installed through the outer foundation or basement wall of a building, shall beencased in a protective sleeve or protected by an approved device or method. The space spaces betweenthe gas piping and the sleeve and between the sleeve and the wall shall be sealed to prevent entry of gasand water. All sealants shall be compatible with the piping, sleeve, and building materials that are incontact with the sealing materials.


These amendments should eliminate the use of sealant materials that could hasten corrosion or other chemical reaction of the affected components. Importantly, the amendments will also promote consistency with other building codes. Specifically, these amendments will harmonize NFPA 54 with the requirements in 2018 International Plumbing Code §315.1 and in 2018 International Residential Code §P2601.1, which both require the use of “compatible” sealants (an undefined term) for a building’s plumbing penetrations, and with the requirements in 2017 NFPA 70 National Electric Code §225.27, §230.8, and §300.5(G), which all require the use of “identified” sealants (a defined term) for a building’s electrical penetrations.The term “compatible” is already used but is not defined in NFPA 54 (see, §5.6.8(3)). Therefore, NFPA 54 Sec. 3.1 provides that Merriam-Webster’s Collegiate Dictionary, 11th edition will be used as the source for determining the “ordinarily accepted meaning” of the term “compatible.” Here, the relevant dictionary definitions would be “capable of existing together in harmony,” and/or “designed to work with another device or system without modification; esp. : being a computer designed to operate in the same manner and use the same software as another computer.” Finally, the amendment to 7.1.5 contains an editorial change so that the section uses the plural of the term “space.” This is suggested because this term is used in a sentence that refers to two different spaces: 1) the space between the gas piping and the sleeve and 2) the space between the sleeve and the wall.



Public Input No. 113-NFPA 54-2018 [Section No. 7.2.1] Similar change.





Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: This revision eliminates the use of sealant materials that could hasten corrosion or other chemicalreaction of the affected components. Importantly, the revision will also promote consistency with otherbuilding and plumbing codes.



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7.2.1

Piping installed aboveground shall be securely supported and located where it will be protected fromphysical damage. Where passing through an exterior wall, the piping shall also be protected from corrosionby coating or wrapping with an inert material approved for such applications. The piping shall be sealedaround its circumference at the point of the exterior penetration to prevent the entry of water, insects, androdents. Where piping is encased in a protective pipe sleeve, the annular spaces between the gas pipingand the sleeve and between the sleeve and the wall opening shall be sealed. Piping installed outdoorsshall be elevated not less than 3 ½ inches (89 mm) above the ground and where installed across roofsurfaces, shall be elevated not less than 3 ½ inches (89 mm) above the roof surface.


The minimum distance above the ground and roof surfaces will help ensure that piping is not in contact with corrosive environments and does not sit in standing water. The 3 ½ inch clearance was obtained from a similar requirement in the 2018 International Fuel Gas Code.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: Installing above the ground will help ensure that piping is not in contact with corrosive environmentsand does not sit in standing water. The 3 1/2 inch clearance allows for debris to pass underneathrather than be caught.



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7.2.1

Piping installed aboveground shall be securely supported and located where it will be protected fromphysical damage. Where passing through an exterior wall, the piping shall also be protected from corrosionby coating or wrapping with an inert material approved for such applications. The piping shall be sealedaround its circumference at the point of the exterior penetration to prevent the entry of water, insects, androdents. Where piping is encased in a protective pipe sleeve, the annular spaces between the gas pipingand the sleeve and between the sleeve and the wall opening shall be sealed. All sealants shall becompatible with the piping, sleeve, and building materials that are in contact with the sealing materials.


These amendments should eliminate the use of sealant materials that could hasten corrosion or other chemical reaction of the affected components. Importantly, the amendments will also promote consistency with other building codes. Specifically, these amendments will harmonize NFPA 54 with the requirements in 2018 International Plumbing Code §315.1 and in 2018 International Residential Code §P2601.1, which both require the use of “compatible” sealants (an undefined term) for a building’s plumbing penetrations, and with the requirements in 2017 NFPA 70 National Electric Code §225.27, §230.8, and §300.5(G), which all require the use of “identified” sealants (a defined term) for a building’s electrical penetrations.The term “compatible” is already used but is not defined in NFPA 54 (see, §5.6.8(3)). Therefore, NFPA 54 Sec. 3.1 provides that Merriam-Webster’s Collegiate Dictionary, 11th edition will be used as the source for determining the “ordinarily accepted meaning” of the term “compatible.” Here, the relevant dictionary definitions would be “capable of existing together in harmony,” and/or “designed to work with another device or system without modification; esp. : being a computer designed to operate in the same manner and use the same software as another computer.” Finally, the amendment to 7.1.5 contains an editorial change so that the section uses the plural of the term “space.” This is suggested because this term is used in a sentence that refers to two different spaces: 1) the space between the gas piping and the sleeve and 2) the space between the sleeve and the wall.



Public Input No. 112-NFPA 54-2018 [Section No. 7.1.5] Similar change





Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: This revision eliminates the use of sealant materials that could hasten corrosion or other chemicalreaction of the affected components. Importantly, the revision will also promote consistency with otherbuilding and plumbing codes.



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7.2.2 Protective Coating.

Where piping is in contact with a material or an atmosphere corrosive to the piping system, the piping andfittings shall be coated with a have a factory or field applied corrosion-resistant material layer or shall bepainted . Any such coating used on piping or components shall not be considered as adding strength to thesystem.


The proposal would clarify that painting can serve as a coating under this section. We have received member input that some jurisdictions have interpreted this section to prohibit the use of painting.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: Annex material is added to clarify that painting is an acceptable method.



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7.8.2.1 Accessibility of Gas Valves.

Main gas System shutoff valves controlling several gas piping systems shall be readily accessible foroperation and installed so as to be protected from physical damage. They shall be marked with a metal tagor other permanent means attached by the installing agency so that the gas piping systems suppliedthrough them can be readily identified.


A new section and definition is added for "System Shutoff Valves" to replace "Main Gas Shutoff Valve." The section is being revised to reflect this change.



Public Input No. 91-NFPA 54-2018 [New Section after7.8.2.4]

New section for system shutoff valves to replace"Main"


New definition for change.






Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: A new section and definition is added for "System Shutoff Valves" to replace "Main Gas Shutoff Valve"and clarify the difference between the service shutoff valve and system shutoff valve. The section isbeing revised to reflect this change.

This section is being moved from 7.8.2.1 to 7.8.1 because it applies to more than just valvescontrolling multiple systems.



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7.8.2.5 System Shutoff Valves.

Where a system shutoff valve is installed, the valve shall be in accordance with 5.12. System shutoff valvesshall be permitted to serve as the emergency shutoff valve in accordance with 7.8.2.3.


Add a new definition for main shutoff valves since that term is used in section 7.8.2.1. The new definition is also needed to define the term for new section 7.8.2.5. For many years, the natural gas utility’s service shutoff valve has been used to serve as a building owner’s maintenance valve and the emergency shutoff valve, especially in many single and double family buildings and other light commercial locations. Federal regulations now require that these valves be operated only by a qualified person. Home owners and other members of the public are not considered to be a qualified person and therefore they should not operate the service shutoff valve. In response to this, some gas utilities have begun to install a second whole building shutoff valve after the point of delivery. New section 7.8.2.5 provide coverage for these valves.



Public Input No. 93-NFPA 54-2018 [New Section after 3.3.99.6] New definition for System Shutoff Valves

Public Input No. 92-NFPA 54-2018 [Section No. 7.8.2.1] New section to replace "Main"






Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: The natural gas utility’s service shutoff valve has been used to serve as a building owner’smaintenance valve and the emergency shutoff valve, especially in many single and double familybuildings and other light commercial locations. Federal regulations now require that these valves beoperated only by a qualified person. Home owners and other members of the public are notconsidered to be a qualified person and therefore they should not operate the service shutoff valve. Inresponse to this, some gas utilities have begun to install a second whole building shutoff valve afterthe point of delivery. New section 7.8.4 provides coverage for these valves.



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7.12.1 Pipe and Tubing Other than CSST.

Each aboveground portion of a gas piping system , other than CSST, that is likely to become energizedshall be electrically continuous and bonded to an effective ground-fault current path. Gas piping, other thanCSST, shall be considered to be bonded when it is connected to appliances that are connected to theappliance grounding conductor of the circuit supplying that appliance.


Require that all gas piping be bonded. While traditionally the phrase “likely to become energized” applied to gas piping serving appliances that have an electrical connection, the phrase is open to interpretation and is unenforceable language. Not requiring metallic gas piping such as black steel and copper to be bonded in certain installations (where an appliance without an electrical connection is installed, typically a natural draft water heater) differs from the National Electric Code (NEC). The NEC requires all metallic building systems to be bonded to a common grounding electrode system to prevent different electrical potentials between metallic systems which mitigate potential shock hazards. But the NEC refers to the NFGC for gas bonding.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement

Resolution: This revision would require bonding of piping that is not electrically connected and unlikely to becomeenergized, such as piping to a cook top or gas log set. There is no substantiation to make such achange.



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CSST gas piping systems, and gas piping systems containing one or more segments of CSST, shall beelectrically continuous and bonded to the electrical service grounding electrode system or, where provided,lightning protection grounding electrode system. CSST shall have a DC resistance of .005 ohms per foot orless.


The NEC (NFPA 70) has Article 240, Over Current Protection, as well as Article 250, Grounding. The underlying premise is that in the case of a ground fault,. the OCP will react before anyone is hurt OR that a fire situation may be avoided NFPA 250 104(b), requiring that piping components be effectively dealt with so as to minimize fault currents, follows these assumptions. The problem lies exclusively with CSST, much of which has DC resistance of >> 5 milliohms per foot. If a length of CSST becomes energized by a TOV (Temporary Over Voltage),. there is no guarantee that the OCP will react timely, or at all. The entire situation depends on potential, length, resistance, and OCP setting. There are already instances where persons have become shocked when CSST becomes energized. There are situations when jacketing on CSST has caught fire because of CSST overheating and a breaker / OCP device not timely react.

The NEC has rejected issues of bonding & grounding in the past re bonding of CSST, sending them to the NFPA 54 panel. The 54 panel is apparently the only panel that can deal with this issue - the resistance is too high on this product. The CSST is not effective in clearing ground faults, with the resul being electrical shock or electrical fires.


Submitter Full Name: Mark Goodson

Organization: Goodson Engineering

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Committee Statement

Resolution: This is a product issue and not an installation code issue, and would be more appropriatelyaddressed in ANSI LC1.



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7.12.2.3 *

The length of the jumper between the connection to the gas piping system and the grounding electrodesystem shall not exceed 75 ft 25 ft (22 m 8 m ). Any additional grounding electrodes installed to meet thisrequirement shall be bonded to the electrical service grounding electrode system or, where provided,lightning protection grounding electrode system.


Shorter direct bonding of the CSST to the grounding electrode improves safety. 75 ft is not adequate to minimize the probability of arcing to the CSST.Prevention of an arc forming onto the CSST needs to be the primary safety consideration for regulating the bonding. Limitation of the energy delivered once an arc is formed is secondary. The value determined by the committee, using the referenced GTI report, is based on the amount of current that is shunted into the grounding circuit from a direct bond to the CSST. Shunting the current limits the energy delivered to the CSST, enhancing its ability to survive an electrical arc without puncture. However, the length of the bond needed to minimize the probability of an arc forming in the first place is not considered.The voltage developed from current flowing through the direct bond is dependent upon two conductor properties, resistance and inductance. It is well known that voltage differences occur from current flow through a resistance and from current risetime imposed upon the inductance. Such voltagedifferences can far exceed test scenarios conducted for CSST. For example, a #6AWG bonding wire has approximately 1.23 microHenry per meter inductance and aresistance of 0.0013 ohms per meter. Using realistic lightning risetimes (which exceed the values assumed by the GTI report) and only considering inductance, a 75foot run of #6AWG wire will develop a voltage drop of approximately 307 kilovolts. However, a 25foot run will only develop approximately a 100 kilovolt drop. The reduction achieved by the shorter distance puts the voltage much closer to the insulating value of typical CSST jacketing, which is on the order of 60 kilovolts.CSST jacketing cannot defend against the voltage developed through the longer bonding length.Also, as the GTI testing shows, ‘shorter is better’ (GTI 2015, p. 28) with respect to bond length. The shorter length will far better limit the amount of current injected into the CSST in the event of an arc, or conduction by contact, thus greatly enhancing the survivability of the CSST against puncture through an electrical arc.As a peer reviewer of the GTI report (GTI, 2013) I observed at the time (April 2013) that some variables used were minimal. For example, the lightning risetimes, current magnitudes used and test voltages used were minimal compared to well known lightning phenomenology. (Rakov, 2002,) The known values far exceed those used in the report, which is the basis for the 75 foot bonding conductor length. A greater safety factor is necessary to account for these minimal values throughusing a shorter bonding conductor length. The shorter bonding conductor length overcomes the uncertainties, limitations and questionable assumptions used in determining the 75 foot value. These include the assumption of consistently low grounding electrode resistance, use of minimal lightning current risetimes, below average current magnitude of the lightning strikes, neglecting the restrike current in real lightning events, low voltages used in testing compared to real lightning events, and conditions resulting from imperfect installations. The shorter length of the bonding conductor provides an additional and necessary safety factor to account for these problems.

safety factor to account for these problems.Shorter bonding length (of 25 ft) provide a greater degree of safety through better limiting the voltagedrop between CSST and other metal components thereby minimizing the probability of thedevelopment of an electric arc. The shorter bonding length complements other protective measuressuch bonding to shunt a larger amount of current to ground, (minimizing energy delivery to the CSST,also better accomplished through the same shorter bonding conductor) spacing of the CSST (seePC#81 & PI#110, minimizing probability of arc formation) and insulating or arcresistantjacketing(reducing the damage from an arc.) Used in concert, these protective measures provide a greaterdegree of safety for CSST installations than any one alone.References:Gas Technologies Institute, Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage, September 5, 2013.Gas Technologies Institute, Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage –Revision A, October 12, 2015.Rakov, Vladimir A., Uman, Martin A., et. al., Direct Lightning Strikes to the Lightning Protective System of a



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Residential Building: Triggered Lightning Experiments, IEEE Transactions On Power Delivery, Vol. 17, No. 2, April 2002.


Submitter Full Name: John Tobias

Organization: US Department of the Army

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Committee Statement

Resolution: Data has not been submitted to demonstrate that the existing distance of 75 is inadequate. The intentof the code is to protect against indirect lighting strikes.



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7.12.2.3 *

The length of the jumper between the connection to the gas piping system and the grounding electrodesystem shall not exceed 75 ft (22 m exceed 25 ft (7.62 m ). Any additional grounding electrodes installed tomeet this requirement shall be bonded to the electrical service grounding electrode system or, whereprovided, lightning protection grounding electrode system.


The bonding distance of 75 feet has been researched and the findings reveal that the distance is too far. Several papers are submitted to the committee for review as the main reasoning behind the rejection both in the last cycle and subsequent NITMAM proceedings were that no technical justification has been submitted. The previous cycle the 54 committee relied heavily on the GTI report that head several flaws in the conclusions.


Submitter Full Name: Mark Morgan

Organization: East Coast Lightning Equipment

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Resolution: Data has not been submitted to demonstrate that the existing distance of 75 is inadequate. The intentof the code is to protect against indirect lighting strikes.



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7.12.2.4

Bonding connections shall be in accordance with NFPA 70. In addition, bending radii of the bondingconductor shall not be less than 8" in diameter, and no included angle shall be less than 90 degrees.


The bonding requirement that is specific to CSST is intended to deal with dissipation of lightning energy associated with CSST and its propensity to be damaged. NEC bonding and grounding techniques are NOT intended to deal with the management of lightning energy. Scientifically, fast current slew rates cannot negotiate tight bends on conductors intended to mitigate lightning damage. The lightning energy would rather "jump" (arc) off a tight turn as opposed to make a tight turn. This phenomenon can be shown a number of ways, to include forward and reflected waves, mutual and self inductance associated with neighboring lengths of wire, and Steady State analysis using phasor components. Regardless, there is NO lightning text that advises the use of tight turns or bends for conductors carrying lightning currents. See NFPA 780 Article 4.9.5. Conductor Bends. No bend of a conductor shall form an included angle of less than 90 degrees , nor shall it have a radius of bend less than 203 mm (8 in.), as shown in Figure 4.9.5 .

It is inconceivable that NFPA 780 prescribes a known and accepted method for managing electrical energy associated with lightning and NFPA 54 ignores the same sage guidance of NFPA 780.


Submitter Full Name: Mark Goodson

Organization: Goodson Engineering

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Committee Statement

Resolution: The bonding radius in NFPA 780 only applies to the main conductor, and not the secondary bondingconductors. This committee has reviewed all recommendations made by the NFPA 780 committeemembers and has accepted those that are relevant to gas piping within the scope of NFPA 54.



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CSST Spacing

CSST shall be spaced a minimum of 6 inches from any metallic component, grounded metal parts andelectrical conductors


The problem resolved by this addition is minimizing risk of fire caused by lightning interaction with CSST piping.

Spacing of CSST from metallic objects is recommended by manufacturers and local codes to prevent electrical arcing to CSST from lightning strikes and/or otherelectrical transients. No enforceable/inspectable language exists to consistently articulate this requirement.

Adding spacing to CSST installations is justified by empirical observations, test results, physics of arc development and precedent set by some local codes as well asmanufacturer instructions.

Forensic review of CSST puncture as a consequence of near-strike lightning reveals that in many cases an arc develops to or from a metallic component in closeproximity, despite the presence of direct bonding of the CSST to ground electrode system, as required by NFPA 54 and many manufacturers.Review of recent reports and studies, notably the GTI report on the matter, (Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect LightningRelated Damage, September 5, 2013 available on nfpa.org) shows that arcs can develop despite the presence of bonding. Depending on certain variables includingthe length of the bonding conductor and magnitude of the lightning event, arcs may or may not cause damage. Spacing minimizes the possibility of arcing thus furtherminimizing the possibility of damage to the CSST.While the insulating coating (intended to enhance safety to defeat lightning-related arcing) on the CSST for most manufacturers has a dielectric strength ofapproximately 60 kilovolts, on average, it is not sufficient to guard against the voltages that could be developed in a near-strike lightning event. Addition of the 6-inchspacing provides an additional 450 kilovolt isolation, approximately. In fact, some recent publications suggest that the insulating coating is not effective in minimizingarcing and the actual dielectric strength of the CSST as installed is significantly lower than 60 kilovolts. (Goodson, Icove, ISFI 2014, accessed at:http://goodsonengineering.com/wp-content/uploads/Electrical-Characterization-of-CSST.pdf) Adding the spacing enhances protection by defeating any dielectricstrength reductions imposed by bends in the CSST, damage or irregularity in the coating, dirt on the coating, etc.As a precedent, some local codes have adopted spacing as a requirement. The most common language used in these codes say to “maintain as much separation asreasonably possible from other electrically conductive systems in the building.”Most of the surveyed local building codes defer to NFPA 54 and IFGC 310.1.1. Additional language defers to manufacturer’s instructions, for example: “CSST pipingsystems shall be installed in accordance with the terms of their approval, the conditions of listing, the manufacturer’s instructions and this code. The installation of thebonding jumper shall be by an electrician with an electrical permit and inspected by the electrical inspector.”There are a two specific examples of local codes that I can refer to:Rogers County, OK – Largest separation (See item i)Policy:a) Corrugated Stainless Steel Tubing shall be permitted to be used as approved in the most recent codes that havebeen adopted. Current CSST approval codes are2009 Fuel Gas Code Section 403.5.4 and 2009 International Residential Code G2414.5.3.b) Corrugated Stainless Steel Tubing shall be installed to meet the installation requirements of sections G 2415and Fuel Gas Code section 404.1. The followinginstallation requirements shall be used in addition to the requirements listed in the adopted codes.c) CSST shall not be allowed within the space between roof rafters.d) CSST shall not be allowed on the roof deck side of insulation installed between rafters.



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e) CSST shall not enter the attic by passing through the top plate of an exterior wall.f) CSST shall be installed with approved change in direction fittings per the manufactures instructions.g) CSST shall not be installed by lying on the top side of ceiling Joist.h) CSST shall be installed with a minimum of 6 inches separation from HVAC ductwork, Electrical wiring,Communication wiring, Metal electrical fixture boxes and theirsupports, or any other material that may create a path to ground.i) A minimum of 6 inches shall be maintained between the CSST and house wiring located within a wall cavity.j) CSST shall be bonded by a minimum bare number 6 solid copper wire. The bonding wire shall be attached to alug added for that purpose in the main load center.k) CSST bonding wire shall be attached to a brass nut located on the CSST manifold, with the other endconnecting to the lug added in the main load center.l) CSST bonding shall be installed by a licensed electrical contractor that is registered with Rogers County.m) CSST with damaged outer covering shall be replaced.n) CSST shall not be spliced.o) In Hybrid systems CSST shall not pass through walls.p) CSST used to repair an existing black pipe system shall be installed to meet the connector requirements asstated in Section 411 of the 2009 InternationalMechanical Code.q) When a CSST system is repaired or when equipment supplied by a CSST system is replaced the system shallbe bonded to meet the current bonding requirementsin place at the time of replacement.State code language – IndianaAll metal gas piping upstream from the equipment shutoff valve(s) shall be electrically continuous and shall be bonded to an effective ground-fault current path inaccordance with Section E3509.7. Except where connected to appliances and at bonding connections, corrugated stainless steel piping shall be isolated from metal gas piping, metal water piping, metal air ducts, metal structural framing, and all electrical wiring methods by a space separation of at least 2 inches. Table E3503.1, or the piping system listing requirements, shall be used to size the bonding conductor used to bond corrugated stainless steel gas tubing (CSST) to the electrical system. (Fire Prevention and Building Safety Commission; 675 IAC 14-4.3-155.5; filed Oct 21, 2005, 1:50 p.m.: 29 IR 806; filed Mar 6, 2008, 11:13 a.m.: 20080402-IR-675070483FRA; readopted filed Aug 4, 2011, 8:35 a.m.: 20110831-IR-675110254RFA)In addition, recent literature (Goodson, Icove, ISFI 2014) also indicates that manufacturer instructions recommend spacing of the CSST from metal, as well. Sampletext cited admonishes: ‘Care should be taken when installing [tradename] tubing runs to maintain as much separation as reasonably possible from other electricallyconductive systems in the building.” I note that the requirement ‘as much separation as reasonably possible’ is not inspectable nor enforceable.In conclusion, this proposal seeks to include enforceable requirements that is already recommended by CSST manufacturers, various authorities having jurisdictionand by fire prevention and lightning protection experts.




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Resolution: This requirement would be unenforceable and would eliminate CSST where metal framing is used inconstruction.



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7.12.3 Arc-Resistant Jacketed CSST.

CSST listed with an arc-resistant jacket or coating system in accordance with ANSI LC 1/CSA 6.26, FuelGas Piping Systems Using Corrugated Stainless Steel Tubing , shall be electrically continuous and bondedto an effective ground fault current path. Where any CSST component of a piping system does not have anarc-resistant jacket or coating system, the bonding requirements of 7.12.2 shall apply. Arc-resistantjacketed CSST shall be considered to be bonded when it is connected to appliances that are connected tothe appliance grounding conductor of the circuit supplying that appliance.


Section conflicts with 7.12.4, prohibited use. Lack of bonding makes the CSST effectively a grounding conductor. also, requiring direct bonding of all CSST maximizes safety by minimizing the probability of puncture due to lightning events. The current 7.12.3 eliminates the requirement for direct bonding that will have the effect of routing lightning current through a structure maximizing the probability of arcing to/from the CSST. It also maximizes the probability of other electrical damage through other effects of the lightning current. Removing this section (7.12.3) preserves the direct bonding requirement for all CSST, maximizing safety. The proposal to eliminate direct bonding from any CSST ignores the concept of potential equalization, which is a key feature in minimizing the likelihood of arcing. (See NFPA 78014A, Section 4.14 – 4.14.1) Bonding through the appliance to the ground circuit is a technique that is sufficient, in many cases, of providing an effective path to ground for fault currents but not for effective potential equalization. CSST installation techniques need to minimize development of the initial arc through potential equalization, which minimizes the severe voltage differences that can occur from lightning strikes. Bonding at the served appliance maximizes the path of lightning current through the structure (and through the CSST.) Voltage difference, leading to arcing, is proportional to distance of the circuit path. Eliminating bonding close to the entry of the CSST to the structure actually has the effect of creating a long lightning current path through the structure which maximizes the chance of arcing somewhere within the structure. It imposes lightning current upon circuits that are not intended for lightning currents (such as gas fittings/connectors, appliance plugs, small gauge electrical wiring, etc.) which can cause other modes of electrical damage that have not been considered. Consider also that this section effectively uses the CSST as a grounding conductor, which is not consistent with the intent of other parts of NFPA 54. CSST has a resistance and inductance per unit length, as does any conductor. It is well known that voltage differences occur from current flow through a resistance and from current risetime imposed upon the inductance. Such voltage differences can far exceed test scenarios conducted for CSST. For example, given approximately 2.5 microHenry per meter inductance of CSST (typical value from GTI, 2015) voltages induced in a 25 meter (approximately 75 feet) length are on the order of 625 kilovolts for typical (not maximal) lightning current risetimes. (Voltage equals the inductance times the risetime of the current. A realistic lightning risetime is 10^10 Amperes per second. Maximal events have risetimes of 10^11 Amperes per second.) Also consider the voltage induced from resistance on the current flowing through the CSST (or through any conductor) is additive, so even higher voltages are possible than demonstrated by this simple example. Development of these voltages is hazardous and well beyond the scope of CSST testing performed. GTI and other tests show that the likelihood of CSST puncture increases as test voltage increases. (GTI 2013, 2015) Testing of CSST never occurred at values over approximately 35 kilovolts, which is far less than the possible voltage developed during realistic nonmaximal lightning events, especially without any potential equalization from direct bonding. On the other hand, direct bonding is intended to minimize voltage differences between CSST and other metal structural materials and to minimize current flowing on CSST. Minimization of both substantially reduces the probability of arc development and reduces the amount of energy delivered to the CSST, should an arc occur. GTI test reports also note that lightning strikes with currents up to 50 kiloamperes occur but were not studied. (In fact, lightning strikes of far greater current magnitude do occur.) Events studied by GTI were limited to 10 kiloamperes. Documentation from the committee’s formulation of this section for arc resistant CSST notes a 400% better resistance against arcing. Yet test results used by the committee in considering other CSST proposals note 500% more current (and energy) can occur. Such events will defeat the arc resistant CSST without some other means of defense. I conclude that removal of the direct bonding requirement for CSST, or any metal piping system, increases the likelihood of arcing at some point of the system. Lack of direct bonding actually increases the hazard by increasing the probability of arcing as well as inducing voltages beyond the proof ratings of the arc resistant CSST. Arc resistance of the CSST should not be relied upon as the sole defense against electrical puncture from lightning induced arcing. Minimizing the probability of arc formation is the first line of defense. Minimizing current on the CSST, also through direct bonding is a necessary second line of defense. Arc resistance of CSST is the last line of defense upon which there should not be sole reliance. As such,



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the direct bonding requirement must be retained for arc resistant CSST to maintain a reasonable degree of safety. References: Gas Technologies Institute, Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage, September 5, 2013. Gas Technologies Institute, Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage –Revision A, October 12, 2015. NFPA 54 Public Input Supporting Documents 73015




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Resolution: There is no evidence that arc resistant jacketed CSST provides any less protection than bondedCSST.



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8.1.5 Detection of Leaks and Defects.

8.1.5.1

The piping system shall withstand the test pressure specified without showing any evidence of leakage orother defects. Any , or the piping system shall have a leakage rate less than 5,000cc/hr. If using pressuregauges, any reduction of test pressures as indicated by pressure gauges shall be deemed to indicate thepresence of a leak unless such reduction can be readily attributed to some other cause.

8.1.5.2

The leakage shall be located by means of an approved gas detector, a noncorrosive leak detection fluid, orother approved leak detection methods.

8.1.5.3

Where leakage or other defects are located, the affected portion of the piping system shall be repaired orreplaced and retested.


Using the formula for leakage rate using test volume, test time, and the allowed, measurable pressure decay values already in the code, the allowed leakage rates for various pipe volumes and pressures range from about 2,000 cc/hr (e.g. a 3 PSI system having 10ft^3 of volume) to over 150,000 cc/hr. It may not always be practicable to measure the actual leakage rate on large piping systems in the field, but there are means to do this, and where it can be done, it would be helpful if NFPA 54 established some level of allowed leakage rate for such cases.




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Resolution: There would be no way to demonstrate compliance and this requirement would be unenforceable.



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8.1.5.1

The piping system shall withstand the test pressure specified without showing any evidence of leakage orother defects. Any reduction of test pressures as indicated by pressure gauges shall be deemed to indicatethe presence of a leak unless such reduction can be readily attributed to some other cause.

Add Annex information to 8.1.5.1 as follows

"Bubble- tight", "leak free" and "leak tight" are not defined terms, but their use is common in theindustry."Bubble- tight" typically refers to no visible bubbles using a gas leak detection solution. "Leak-tight"typically refers to no detectable leak or a leakage rate less than the allowed by the applicable standard forthe device or component. "Leak free" is not technically possible, yet it can mean the same as "leak tight"or "bubble tight".


I do not know if the committee feels that this brings value to industry, i just know that these terms are often used, and they mean different things to different people.




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Submittal Date: Thu May 31 15:46:35 EDT 2018

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Resolution: These terms are not used within the code. Providing annex material on these terms would add novalue.



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9.1.1.1

Approved shall mean “acceptable to the authority having jurisdiction.”


"Approved" is defined in 3.2.1 as "Acceptable to the Authority Having Jurisdiction, which is repeated in 9.1.1.1. This redundancy is not needed in the Code.




Affiliation: None

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Statement: "Approved" is defined in 3.2.1 as "Acceptable to the Authority Having Jurisdiction, which is repeatedin 9.1.1.1. This redundancy is not needed in the Code.



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9.1.1.3

Acceptance of unlisted appliances, unlisted equipment, and accessories shall be on the basis of a soundengineering evaluation. Acceptance of unlisted appliances shall be on the basis of the applicableinstallation standard such as NFPA 86, NFPA 87, NFPA 85, NFPA 37 etc...


I first assume that the approval of unlisted appliance does not apply to residential applications having delivery pressures 2 PSI or less because the safety in not having overpressure protection on such systems is in part due to the fact that the downstream appliances are listed to a safety standard. However, this section makes sense for appliances that are designed to and comply with an applicable installation standard such as industrial equipment to NFPA 86, thermal fluid heaters to NFPA 87, turbine and gas engines to NFPA 37, etc.




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Resolution: The NFPA standards which were proposed are not all inclusive and too open ended with "etc"



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9.1.1.4

The unlisted appliance, equipment, or accessory shall be safe and suitable for the proposed service andshall be recommended for the service by the manufacturer.


This proposal is intended to eliminate the acceptability of unlisted products in the code, and instead require products to be listed to the applicable American National Standard by an organization acceptable to the code official. Specifying requirements in the code for unlisted products puts additional burden on the installer and authority having jurisdiction to determine if they will permit a product to be installed. If there is not an acceptable standard, the authority having jurisdiction has the option under clause 1.4, Equivalency, to allow unlisted products to be installed.




























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Mon Jun 25 15:48:49 EDT 2018Submittal Date:

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Committee Statement

Resolution: This revision would cause unlisted appliances to not comply with the code. There is no technicalsubstantiation that unlisted appliances are a safety hazard.


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9.1.3 Type of Gas(es).

The appliance shall be connected to the fuel gas for which it was designed. No attempt shall be made toconvert the appliance from the gas specified on the rating plate for use with a different gas withoutconsulting the installation instructions, the serving gas supplier, or the appliance manufacturer for completeinstructions.Listed appliances shall be converted where permitted by and in accordance with themanufacturer's installation instructions.


The requirement is too general resulting in confusion on which appliances can be converted. Listed appliances should only be converted where permitted by the manufacturer and in accordance with their specific instructions.




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Statement: The existing requirement was too general resulting in confusion on which appliances can beconverted. Listed appliances should only be converted where permitted by the manufacturer and inaccordance with their specific instructions. The committee has become aware of certain gas suppliersconverting listed unvented heaters without referring to the manufacturer's installation instructions.



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9.1.16 Adequate Capacity of Piping.

When additional appliances are being connected to a gas piping system, the existing piping shall bechecked to determine whether it has adequate capacity. Where the capacity is inadequate, the existingsystem shall be enlarged as necessary, or separate gas piping of adequate capacity shall be run from thepoint of delivery to the appliance.


Delete duplicate coverage. The section was moved into 5.1.2 for the 2018 edition as follows:“5.1.2 Addition to Existing System. When additional appliances are being connected to a gas piping system, the existing piping shall be checked to determine whether it has adequate capacity. If the capacity of the system is determined to be inadequate for the additional appliances, the existing system shall be enlarged as required, or separate gas piping of adequate capacity shall be provided.”




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Statement: Delete duplicate coverage. The section was moved into 5.1.2 for the 2018 edition.



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9.1.18 Gas Appliance Pressure Regulators.

Where the gas supply pressure is higher than that at which the appliance is designed to operate or variesbeyond the design pressure limits of the appliance, a gas appliance pressure regulator listed in accordancewith ANSI Z21.18/CSA 6.3 shall be installed.


This proposal is intended to require the appliance to be listed to the applicable American National Standard by an organization acceptable to the code official. Listed, as defined in Section 3.2.5 of the Code.








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Statement: This requires the gas appliance pressure regulator to be listed to the applicable American NationalStandard by an organization acceptable to the code official. Listed is defined in Section 3.2.5 of theCode. A listed regulator provides a level of performance and reliability that an unlisted one may not.



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9.1.19 Atmospheric Venting of Gas Appliance Pressure Regulators.

Venting of gas appliance pressure regulators shall comply with the following requirements:

(1) Appliance pressure regulators requiring access to the atmosphere for successful operation shall beequipped with vent piping leading outdoors or, if the regulator vent is an integral part of the appliance,into the combustion chamber adjacent to a continuous pilot, unless constructed or equipped with a ventlimiting means to limit the escape of gas from the vent opening in the event of diaphragm failure.

(2) Vent limiting means shall be employed on listed appliance pressure regulators only.

(3) In the case of vents leading outdoors, means shall be employed to prevent water from entering thispiping and also to prevent blockage of vents by insects and foreign matter.

(4) Under no circumstances shall a regulator be vented to the appliance flue or exhaust system.

(5) In the case of vents entering the combustion chamber, the vent shall be located so the escaping gas isreadily ignited by the pilot and the heat liberated thereby does not adversely affect the normaloperation of the safety shutoff system. The terminus of the vent shall be securely held in a fixedposition relative to the pilot. For manufactured gas, the need for a flame arrester in the vent piping shallbe determined.

(6) A vent line(s) from an appliance pressure regulator and a bleed line(s) from a diaphragm-type valveshall not be connected to a common manifold terminating in a combustion chamber. Vent lines shallnot terminate in positive-pressure-type combustion chambers.


The term venting has different meanings for gas appliances. There is venting of gas leakage from controls, the venting of gas from a relief valve during an overpressure condition, and venting of products of combustion from appliances. The proposed change clarifies what kind of venting is the scope of this section




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9.1.22 Installation Instructions.

The installing agency shall conform to the appliance and equipment manufacturers’ recommendations incompleting an installation. The installing agency shall leave the manufacturers’ installation, operating, andmaintenance instructions in a location on the premises where they are readily available for reference andguidance of the authority having jurisdiction, service personnel, and the owner or operator.


The paragraph is not needed as it restates the obvious. Further it is applicable to a listed combination, which would have to be installed using the manufacturers instructions, and not the requirements for each appliance or component.




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Statement: This section was edited for clarity and language was moved to the annex because it was guidance.The term "readily available" was uninforceable.



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Recommend either deleting this entire section or revising it to allow an alternate path of testing theequipment to determine if there is actually a problem with the venting. It also needs to specify exactly whatweatherization modifications would trigger this requiremnt. As it is written now, this requirement conflictswith ANSI/BPI-1200- S-2015 Basic Analysis of Buildings. It is also too onerous for compliance byweatherization programs and it conflicts with DoE Weatherization Health and Safety Guidance which onlyallows correction of venting when testing indicates a problem.

9.1.24* Existing Appliances.

Existing appliance installations shall be inspected to verify compliance with the provisions of Section 9.3and Chapter 12 where a component of the building envelope is modified as described by one or more of9.1.24(1) through 9.1.24(6). Where the appliance installation does not comply with Section 9.3 andChapter 12, the installation shall be altered as necessary to be in compliance with Section 9.3 andChapter 12. The building is modified under a weatherization program. ALTERNATELY, existing appliancesshall be tested for spillage in accordance with Annex G OR ANSI/BPI-1200-S-2015 Basic Analysis ofBuildings OR ACCA Standar 12-Exisiting Home evaluation and Performance Improvement, AppendixA5.0. Where the appliance fails spillage testing, the installation shall be altered as necessary to be incompliance with Section 9.3 and Chapter 12. The installer responsible for making the envelope component

change shall be responsible for ensuring compliance with this section.

(1) COMMENT: This is too vague. Weatherization modifications encompass a wide range of work,including something as minor as the replacement of one window or adding a door sweep or addingweather stripping to an attic access. Indeed, this trigger is in conflict with trigger (3). If weatherizationdid nothing but replace one window, does the requirement get triggered because of item (1) or does itnot because it is not as much as item (3)? Not ALL weatherization modificatons should trigger thisrequirment. If this clause is to remain, it needs to be much more specific.

(2) A building permit is issued for a building addition or exterior building modification.

(3) Three or more window assemblies are replaced. COMMENT: There are a number of reasons whywindows may be replaced, not all of which have meaningful airtightness impacts. There should besome more quantitative metric regarding airtightness for this to trigger.

(4) Three or more storm windows are installed over existing windows.

(5) One or more exterior door and frame assemblies are replaced. COMMENT: One door replacementshould not trigger this requirment.

(6) A building air barrier is installed or replaced.



54_PC65.pdf


NOTE: This Public Input appeared as “Reject but Hold” in Public Comment No. 65 of the (A2017) Second Draft Report for NFPA 54 and per the Regs. at 4.4.8.3.1.

Recommend either deleting this entire section or revising it to allow an alternate path of testing the equipment to determine if there is actually a problem with the venting. It also needs to specify exactly what weatherization modifications would trigger this requirement. As it is written now, this requirement conflicts with ANSI/BPI-1200-S-2015 Basic Analysis of Buildings. It is also too onerous for compliance by weatherization programs and it conflicts with DoE Weatherization Health and Safety Guidance which only allows correction of venting when testing indicates a problem.

Regarding weatherization modifications: Weatherization modifications encompass a wide range of work, including



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something as minor as the replacement of one window or adding a door sweep or adding weatherstripping to an attic access. Indeed, this trigger is in conflict with trigger (3). If weatherization did nothing but replace one window, does the requirement get triggered because of item (1) or does it not because it is not as much as item (3)? Not ALL weatherization modifications should trigger this requirement. If this clause is to remain, it needs to be much more specific.

Regarding Item 9.1.24 (3): There are a number of reasons why windows may be replaced, not all of which have meaningful airtightness impacts. There should be some more quantitative metric regarding airtightness for this to trigger.


Submitter Full Name: Tc On Nfg-Aaa

Organization: NFPA TC ON National Fuel Gas Code

Street Address:

City:

State:

Zip:


Committee:

Committee Statement

Resolution: The committee is not aware of any situations where the current language is insufficient. The currentrequirements are appropriate for safety. The standards referenced have also not been submitted forreview.



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9.4.2.3

All appliances requiring an external source of electrical power for its operation shall be provided with thefollowing:

A readily accessible electrical disconnecting means within sight of the appliance that completely de-energizes the applianceA 120 V ac grounding-type receptacle outlet on the roof adjacent to the appliance on the supply side of thedisconnect switch an electrical disconnecting means and a receptacle outlet in accordance with NFPA 70,National Electric Code .


Add a reference to the National Electric Code (NEC-NFPA 70) to help ensure that the National Fuel Gas Code does not conflict with NEC requirements. The NEC may have additional requirements and may also have outlet requirements based on the type of installations (i.e., multiple appliances on the same roof) which may allow one outlet to serve multiple appliances.



Public Input No. 104-NFPA 54-2018 [Section No. 10.2.7] Similar change is requested.





Street Address:

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Committee:

Committee Statement


Statement: Add a reference to the National Electrical Code (NEC-NFPA 70) to help ensure that the National FuelGas Code does not conflict with NEC requirements. The NEC may have additional requirements andmay also have outlet requirements based on the type of installations (i.e., multiple appliances on thesame roof) which may allow one outlet to serve multiple appliances.



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(3) A connector for gas appliances shall be listed connector in compliance accordance with ANSIZ21.24/CSA 6.10, Connectors for Gas Appliances. The connector shall be used in accordance with themanufacturer's installation instructions and shall be in the same room as the appliance. Only oneconnector shall be used per appliance.

(4) A listed connector in compliance connector for outdoor gas appliances and manufactured homes shallbe listed in accordance with ANSI Z21.75/CSA 6.27, Connectors for Outdoor Gas Appliances andManufactured Homes. Only one connector shall be used per appliance.

(5) CSST where installed in accordance with the manufacturer’s installation instructions. CSST shallconnect only to appliances that are fixed in place.








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(3) A listed connector in compliance with ANSI Z21.24/CSA 6.10, Connectors for Gas Appliances. Theconnector shall be used in accordance with the manufacturer's installation instructions and shall be inthe same room as the appliance. Only one connector shall be used per appliance.

(4) A listed connector in compliance with ANSI Z21.75/CSA 6.27, Connectors for Outdoor Gas Appliancesand Manufactured Homes. Only one connector shall be used per appliance.

(5) CSST where installed in accordance with the manufacturer’s installation instructions. CSST shall notbe directly routed into a metallic appliance enclosure where the appliance is connected to a metallicvent which penetrates a roofline. CSST shall connect only to appliances that are fixed in place.




The standard LC1 prohibits the routing of CSST through metallic appliance housings where a metallic vent penetrates the roof. While this prohibition is required to be part of the CSST installation instructions we have become aware that not all appliance installers are aware of this requirement. Adding this installation instruction into the code would help ensure that CSST is properly installed.




Street Address:

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Committee:

Committee Statement


Statement: The standard LC1 prohibits the routing of CSST through metallic appliance housings where a metallicvent penetrates the roof. While this prohibition is required to be part of the CSST installationinstructions we have become aware that not all appliance installers are aware of this requirement.Adding this installation instruction into the code would help ensure that CSST is properly installed.



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9.6.1.3 Commercial Cooking Food Service Appliance Connectors.

Connectors used with commercial cooking with food service appliances that are moved for cleaning andsanitation purposes shall be installed in accordance with the connector manufacturer’s installationinstructions. Such connectors shall be listed in accordance with ANSI Z21.69/CSA 6.16, Connectors forMovable Gas Appliances.


Food service appliance is a defined term and should be used instead of the undefined term "commercial cooking appliance".







Affiliation: None

Street Address:

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Committee:

Committee Statement


Statement: Food service appliance is a defined term and should be used instead of the undefined term"commercial cooking appliance".



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9.6.2 Use of Nonmetallic Gas Hose Connectors.

Listed gas hose connectors shall be used in accordance with the manufacturer's installation instructionsand as follows:

(1) Indoor. Indoor gas hose connectors shall be used only to connect laboratory, shop, and ironingappliances requiring mobility during operation and installed in accordance with the following:

(2) An appliance shutoff valve shall be installed where the connector is attached to the buildingpiping.

(3) The connector shall be of minimum length and shall not exceed 6 ft (1.8 m).

(4) The connector shall not be concealed and shall not extend from one room to another or passthrough wall partitions, ceilings, or floors.

(5) Outdoor. Where outdoor gas hose connectors are used to connect portable outdoor appliances, theconnector shall be listed in accordance with ANSI Z21.54/CSA 8.4 , Gas Hose Connectors for PortableOutdoor Gas-Fired Appliances and installed in accordance with the following:

(6) An appliance shutoff valve, a listed quick-disconnect device, or a listed gas convenience outletshall be installed where the connector is attached to the supply piping and in such a manner so asto prevent the accumulation of water or foreign matter.

(7) This connection shall be made only in the outdoor area where the appliance is to be used.


Editorial change to include the full designation of the standard.




Street Address:

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Statement: Editorial change to include the full designation of the standard.



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9.6.6.1

Quick-disconnect devices used to connect appliances to the building piping shall be listed to in accordancewith ANSI Z21.41/CSA 6.9, Quick-Disconnect Devices for Use with Gas Fuel Appliances.






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10.1.1* Application.

Listed appliances shall be installed in accordance with the manufacturers' installation instructions or, aselsewhere specified in this chapter, as applicable to the appliance. Unlisted appliances shall be installedas specified in this chapter as applicable to the appliances.





Public Input No. 140-NFPA 54-2018[Section No. 9.1.1.4]

Public Input No. 140 also deletes code language that allowsfor unlisted products.




Public Input No. 150-NFPA 54-2018[Section No. 10.4]















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Street Address:

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Committee:

Committee Statement


Statement: The requirement is revised so that the first sentence applies to all appliances, whether listed orunlisted.



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10.2.1 Application.

Gas-fired air conditioners and heat pumps shall be listed in accordance with ANSI Z21.40.1/CSA2.91, Gas-fired Heat Activated Air Conditioning and Heat Pump Appliances , or ANSI Z21.40.2/CSA2.92, Air Conditioning and Heat Pump Appliances (Internal Combustion) .










Street Address:

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Committee:

Committee Statement


Statement: This revision requires products to be listed to the applicable American National Standard by anorganization acceptable to the code official. If there is not an acceptable standard, the authorityhaving jurisdiction has the option under 1.4, Equivalency, to allow unlisted products to be installed.




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10.2 Air-Conditioning Appliances (Gas-Fired Air Conditioners and Heat Pumps) .

10.2.1 Independent Gas Piping.

Gas piping serving heating appliances shall be permitted to also serve cooling appliances where heatingand cooling appliances cannot be operated simultaneously.


To protect against the effects of normal vibration in service, gas gas engines shall not be rigidly connectedto the gas supply piping.



The title of the Section is revised to eliminate the parenthetical phrase. If explanation of what an Air-Conditioning appliance is, it should be located in Annex A.Paragraph 10.2.2 is revised to remove explanatory material. Annex A is a more appropriate location for explanatory material.Paragraph 10.2.4 is revised to remove examples. Such lists of examples are never complete, and can cause confusion. If examples are needed, they should be located in Annex A.



TLemoff EngineeringOrganization:

Affiliation: None

Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: The title of the Section is revised to eliminate the parenthetical phrase. Paragraph 10.2.2 is revised toremove explanatory material.


Air-conditioning appliances shall be installed in accordance with the manufacturer’s instructions. Unless theappliance is listed for installation on a combustible surface such as a floor or roof , or unless the surface isprotected in an approved manner, it shall be installed on a surface of noncombustible construction withnoncombustible material and surface finish and with no combustible material against the underside thereof.


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To protect against the effects of normal vibration in service, gas gas engines shall not be rigidly connectedto the gas supply piping.


The reason that gas engines should not be directly connected to piping is not needed in the requirement. If needed, it should be located in Annex A.




Affiliation: None

Street Address:

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Committee:

Committee Statement


Statement: The title of the Section is revised to eliminate the parenthetical phrase. Paragraph 10.2.2 is revised toremove explanatory material.



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The installation of air-conditioning appliances shall comply with the following requirements:

(1) Listed air Air -conditioning appliances shall be installed with clearances in accordance with themanufacturer’s instructions.

(2) Unlisted air Air -conditioning appliances shall be installed with clearances from combustible materialof not less than 18 in. (460 mm) above the appliance and at the sides, front, and rear and inaccordance with the manufacturer's installation instructions.

Listed and unlisted air-conditioning appliances shall be

(3) permitted to be installed with reduced clearances to combustible material, provided that thecombustible material or appliance is protected as described in Table 10.2.3 and such reduction isallowed by the manufacturer's installation instructions.

(4) Where the furnace plenum is adjacent to plaster on metal lath or noncombustible material attached tocombustible material, the clearance shall be measured to the surface of the plaster or othernoncombustible finish where the clearance specified is 2 in. (50 mm) or less.

(5) Listed air Air -conditioning appliances shall have the clearance from supply ducts within 3 ft (0.9 m) ofthe furnace plenum be not less than that specified from the furnace plenum. No clearance is necessarybeyond this distance.




Related Input


Relationship







Street Address:

City:

Mon Jun 25 17:56:57 EDT 2018

State:

Zip:

Submittal Date:

Committee:

Committee Statement


Statement: The section is revised to apply to listed appliances. This revision aligns with the effort to requireproducts to be listed to the applicable American National Standard by an organization acceptable tothe code official. If there is not an acceptable standard, the authority having jurisdiction has the optionunder 1.4, Equivalency, to allow unlisted products to be installed.



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Air Unless the air -conditioning appliances shall be installed in accordance with the manufacturer’sinstructions. Unless the appliance is listed for installation on a combustible surface such as a floor or roof,or unless the surface is protected in an approved manner, it shall be installed on a surface ofnoncombustible construction with noncombustible material and surface finish and with no combustiblematerial against the underside thereof.


Revised to delete "installed in accordance with the manufacturer's instructions", as it is stated in 10.1.1 where it is applicable to all appliances




Affiliation: None

Street Address:

City:

State:

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Committee:

Committee Statement


Statement: This section is revised to delete "installed in accordance with the manufacturer's instructions", as it isstated in 10.1.1 where it is applicable to all appliances.



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10.2.5 Furnace Plenums and Air Ducts.

A furnace plenum supplied as a part of the air-conditioning appliance shall be installed in accordance withthe manufacturer’s instructions. Where a furnace plenum is not supplied with the appliance, anyfabrication and installation instructions provided by the manufacturer shall be followed. The method ofconnecting supply and return ducts shall facilitate proper circulation of air . Where the air conditioner isinstalled within an enclosure, the installation shall comply with 10.3.7.4.


Following manufacturer's installation instructions is specified in 10.1.1 and is applicable to all appliances It does not need to be repeated here.




Affiliation: None

Street Address:

City:

State:

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Committee:

Committee Statement


Statement: Following manufacturer's installation instructions is specified in 10.1.1 and is applicable to allappliances. It does not need to be repeated here. In addition, the requirements are covered by thereference to 10.3.



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10.2.7 Switches in Electrical Supply Line.

Means for interrupting the electrical supply to the air-conditioning appliance and to its associated coolingtower (if supplied and installed in a location remote from the air conditioner) shall be provided within sightof and not over 50 ft (15 m) from the air conditioner and the cooling tower. shall be in accordance withNFPA 70, National Electric Code ..


Add a reference to the National Electric Code (NEC-NFPA 70) to help ensure that the National Fuel Gas Code does not conflict with NEC requirements.



Public Input No. 103-NFPA 54-2018 [Section No. 9.4.2.3] Similar change is requested.





Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: This revision adds a reference to the National Electric Code (NEC-NFPA 70) to help ensure that theNational Fuel Gas Code does not conflict with NEC requirements.



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10.3.1 Application

Central heating furnaces shall be listed in accordance with ANSI Z21.47/CSA 2.3, Gas-fired CentralFurnaces. Low-pressure boilers shall be listed in accordance with ANSI Z21.13/CSA 4.9, Gas-Fired LowPressure Steam and Hot Water Boilers.







Public Input No. 147-NFPA54-2018 [Section No. 10.3.2.3]





Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: This revision requires products with input ratings up to 400,000 Btu/hr to be listed to the applicableAmerican National Standard by an organization acceptable to the code official. This size wasspecified because it covers most common residential and commercial appliances. If there is not anacceptable standard, the authority having jurisdiction has the option under 1.4, Equivalency, as wellas with the reference to Chapter 9, to allow unlisted products to be installed.




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Listed and unlisted central Central heating furnaces and low-pressure boilers shall be permitted to beinstalled with reduced clearances to combustible material, provided that the combustible material orappliance is protected as described in Table 10.2.3 and Figure 10.3.2.3(a) through Figure 10.3.2.3(c), andsuch reduction is allowed by the manufacturer's installation instructions.

10.3.2.3





Public Input No. 145-NFPA 54-2018 [NewSection after 10.3]










Street Address:

City:

State:

Zip:

Mon Jun 25 17:59:57 EDT 2018Submittal Date:

Committee:

Committee Statement


Statement: This revision is editorial because the section applied to all (listed and unlisted) appliances covered by10.3.


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10.3.2.8

Supply air ducts connecting to unlisted central heating furnaces equipped with temperature limit controlswith a maximum setting of 250°F (121°C) shall have a minimum clearance to combustibles of 6 in.(150 mm) for a distance of not less than 6 ft (1.8 m) from the furnace supply plenum. Clearance shall notbe required beyond the 6 ft (1.8 m) distance.



The requirements specified in this clause are part of ANSI Z21.47/CSA 2.3, and are not needed in the Code if appliances are required to be listed to the applicable standard.




Public Input No. 147 also deletes code language that allows forunlisted furnaces and low-pressure boilers.

Public Input No. 145-NFPA 54-2018[New Section after 10.3]

Public Input No. 145 also deletes code language that allows forunlisted furnaces and low-pressure boilers.


Public Input No. 140 also deletes code language that allows forunlisted products.







Street Address:

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Committee:

Committee Statement

Resolution: Unlisted appliances are still covered in 10.3 so these requirements are necessary.



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10.3.2.9

Central heating furnaces other than those listed in 10.3.2.7 or 10.3.2.8 shall shall have clearances fromthe supply ducts of not less than 18 in. (460 mm) from the furnace plenum for the first 3 ft (0.9 m), then 6 in.(150 mm) for the next 3 ft (0.9 m), and 1 in. (25 mm) beyond 6 ft (1.8 m).



If public input proposal #148 is approved, reference to clause 10.3.2.8 needs to be removed.








Street Address:

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Committee:

Committee Statement

Resolution: Unlisted appliances are still covered under 10.3 so these requirements are necessary.



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10.3.7.4

Where a furnace is installed so supply ducts carry air circulated by the furnace to areas outside the spacecontaining the furnace, the return air shall also be handled by a duct(s) sealed to the furnace casing andterminating outside the space containing the furnace. Return air shall not be taken from the mechanicalroom containing the furnace.


Mechanical codes such as the International Mechanical Code and Uniform Mechanical Code prohibit return air from all mechanical room spaces and other spaces such as bathrooms. The restriction for mechanical rooms is being added to 10.3.7.4 to coordinate with these codes. This would also help to prevent some installers from claiming that the 10.3.7.4 return air duct sealing requirement is not needed when they add a small opening in the supply duct in the mechanical room.




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Committee Statement


Statement: This revision would help to prevent some installers from claiming that the 10.3.7.4 return air ductsealing requirement is not needed when they add a small opening in the supply duct in themechanical room.



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10.4 Clothes Dryers.

10.4. 1 Application.

Clothes dryers shall be listed in accordance with ANSI Z21.5. 1 /CSA 7.1, Gas Clothes Dryer, Volume I,Type 1 Clothes Dryers , or ANSI Z21.5.2/CSA 7.2, Gas Clothes Dryer, Volume II, Type 2 Clothes Dryers .

10.4.2 Clearance.

The installation of clothes dryers shall comply with the following requirements:

(1) Listed Type 1 clothes dryers shall be installed with a minimum clearance of 6 in. (150 mm) fromadjacent combustible material. Clothes dryers listed for installation at reduced clearances shall beinstalled in accordance with the manufacturer's installation instructions. Type 1 clothes dryers installedin closets shall be specifically listed for such installation.

(2) Listed Type 2 clothes dryers shall be installed with clearances of not less than those shown on themarking plate and in the manufacturer's instructions. Type 2 clothes dryers designed and marked “Foruse only in noncombustible locations” shall not be installed elsewhere.

(3) Unlisted clothes dryers shall be installed with clearances to combustible material of not less than 18 in.(460 mm). Combustible floors under unlisted clothes dryers shall be protected in an approved manner.


10.4.5 6 .4

Exhaust ducts for unlisted Type 2 clothes dryers shall be installed with a minimum clearance of 6 in.(150 mm) from adjacent combustible material. Where exhaust ducts for Type 2 clothes dryers are installedwith reduced clearances, the adjacent combustible material shall be protected in accordance with Table










Submitter Information VerificationSubmitter Full Name: Shannon Corcoran


Street Address:

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Committee:

Committee Statement





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10.4.6 Multiple-Family or Public Use.

All clothes dryers installed for multiple-family or public use use shall be equipped with approved safetyshutoff devices and shall be installed as specified for a Type 2 clothes dryer under 10.4.5.


The requirement that "approved safety shutoff devices" is not sufficiently clear to allow for consistent enforcement. The minimum safety devices should be specified.




Affiliation: None

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Committee:

Committee Statement


Statement: The requirement that "approved safety shutoff devices" is not sufficiently clear to allow for consistentenforcement. The minimum safety devices should be specified.



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10.6 Decorative Appliances for Installation in Vented Fireplaces.

10.6.1 Application

Decorative appliancs for installation in vented fireplaces shall be listed in accordance with ANSIZ21.60/CSA 2.26, Decorative Gas Appliances for Installation in Sold-Fuel Burning Fireplaces .


Decorative appliances for installation in vented fireplaces shall not be installed in bathrooms or bedroomsunless the appliance is listed and the bedroom or bathroom has the required volume in accordance with9.3.2.


A decorative appliance for installation in a vented fireplace shall be installed only in a vented fireplacehaving a working chimney flue and constructed of noncombustible materials. These appliances shall not bethermostatically controlled.

10.6.2 3 .1

A listed decorative appliance for installation in a vented fireplace shall be installed in accordance with themanufacturer’s installation instructions.

10.6.2 3 .2

A decorative appliance for installation in a vented fireplace, where installed in a manufactured home, shallbe listed for installation in manufactured homes.

10.6.2 3 .3

An unlisted A decorative appliance for installation in a vented fireplace shall be installed in a fireplacehaving a permanent free opening, based on appliance input rating and chimney height equal to or greaterthan that specified in Table 10.6.2.3.

Table 10.6.2.3 Free Opening Area of Chimney Damper for Venting Flue Gases from Unlisted DecorativeAppliances for Installation in Vented Fireplaces

Minimum Permanent Free Opening (in.2)*

Chimney Height

(ft)

8 13 20 29 39 51 64

Appliance Input Rating (Btu/hr)

6 7,800 14,000 23,200 34,000 46,400 62,400 80,000

8 8,400 15,200 25,200 37,000 50,400 68,000 86,000

10 9,000 16,800 27,600 40,400 55,800 74,400 96,400

15 9,800 18,200 30,200 44,600 62,400 84,000 108,800

20 10,600 20,200 32,600 50,400 68,400 94,000 122,200

30 11,200 21,600 36,600 55,200 76,800 105,800 138,600

For SI units, 1 ft = 0.305 m, 1 in.2 = 645 mm2, 1000 Btu/hr = 0.293 kW.

* The first six minimum permanent free openings (8 in.2 to 51 in.2) correspond approximately to the cross-

sectional areas of chimneys having diameters of 3 in. through 8 in., respectively. The 64 in.2 openingcorresponds to the cross-sectional area of standard 8 in. × 8 in. chimney tile.

10.6 3 .3 Fireplace Screens.

A fireplace screen shall be installed with a decorative appliance for installation in a vented fireplace.


This proposal is intended to eliminate the acceptability of unlisted products in the code, and instead require products to be listed to the applicable American National Standard by an organization acceptable to the code



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official. Specifying requirements in the code for unlisted products puts additional burden on the installer and authority having jurisdiction to determine if they will permit a product to be installed. If there is not an acceptable standard, the authority having jurisdiction has the option under clause 1.4, Equivalency, to allow unlisted products to be installed.











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10.7. 1 1 Application

Vented gas fireplaces shall be listed in accordance with ANSI Z21.50/CSA 2.22, Vented Decorative GasAppliances .


Vented gas fireplaces shall not be installed in bathrooms or bedrooms unless the appliance is listed and thebedroom or bathroom has the required volume in accordance with 9.3.2.





















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Street Address:

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10.7.1 Application

Vented gas fireplaces shall be listed in accordance with ANSI Z21.50/CSA 2.22 , Vented Decorative GasAppliances .


Vented gas fireplaces shall not be installed in bathrooms or bedrooms unless the appliance is listed and thebedroom or bathroom has the required volume in accordance with 9.3.2.















This proposal is intended to require the appliance to be listed by an organization acceptable to the code official. Listed, as defined in Section 3.2.5 includes a requirement that an approved agency posts the certification record in a public forum which is available to the Authority Having Jurisdiction for verification purposes. Testing, according to Section 301.4.1, does not require the testing agency to provide a listing or approved products and appliances.





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Delete Sections 10.8 and 10.9 and replace with the following new section covering both types of DirectGas-Fired Industrial Air Heaters:

10.8 Direct Gas-Fired Industrial Air Heaters.

10.8.1 Types of Direct Gas-Fired Industrial Air Heaters

10.8.1 .1 Non-Recirculating direct gas-fired industrial air heaters. Non-recirculating direct gas-firedindustrial air heaters shall be listed in accordance with ANSI Z83.4/CSA 3.7, Non-Recirculating DirectGas-Fired Industrial Air Heaters .

10.8. 1.2 Recirculating direct gas-fired industrial air heaters of the recirculating type direct gas-firedindustrial air heaters shall be listed in accordance with ANSI Z83.18, Recirculating Direct Gas-FiredIndustrial Air Heaters .

10.8.2 Prohibited Installations.

10.8.2.1 Non-recirculating direct gas-fired industrial air heaters shall not serve any area containingsleeping quarters.

10.8.2.2 Non-recirculating direct gas-fired industrial air heaters shall not recirculate room air.

10.8.3 Installation. Direct gas-fired industrial air heaters shall be installed in accordance with themanufacturer’s instructions.

10.8.4 Clearance from Combustible Materials. Direct gas-fired industrial air heaters shall be installedwith a clearance from combustible materials of not less than that shown on the rating plate and themanufacturer’s instructions.

10.8.5 Air Supply. All outdoor air to the direct gas-fired industrial air heater shall be ducted directly fromoutdoors. Where outdoor air dampers or closing louvers are used, they shall be verified to be in theopen position prior to main burner operation.

10.8.6 Atmospheric Vents or Gas Reliefs or Bleeds. Direct gas-fired industrial air heaters with valvetrain components equipped with atmospheric vents, gas reliefs, or bleeds shall have their vent lines,gas reliefs, or bleeds lead to a safe point outdoors. Means shall be employed on these lines to preventwater from entering and to prevent blockage from insects and foreign matter. An atmospheric vent lineshall not be required to be provided on a valve train component equipped with a listed vent limiter.

10.8.7 Relief Openings. The design of the installation shall include adequate provisions to permit thedirect gas-fired industrial air heater to operate at its rated airflow without overpressurizing the spaceserved by the heater by taking into account the structure’s designed infiltration rate, properly designedrelief openings, or an interlocked powered exhaust system, or a combination of these methods.

10.8.7.1 The structure’s designed infiltration rate and the size of relief opening(s) shall be determinedby approved engineering methods.

10.8.7.2 Louver or counterbalanced gravity damper relief openings shall be permitted. Wheremotorized dampers or closable louvers are used, they shall be proved to be in their open positionprior to main burner operation.

10.8.8 Purging. Inlet ducting, when used, shall be purged with at least four air changes prior to anignition attempt.

10.8.9 Additional Requirements for Non-Recirculating Direct gas-fired Indust rial Air Heaters

10.8.9.2 Non-recirculating direct gas-fired industrial air heaters shall be permitted to provide freshair ventilation.

10.8.9.3 Non-recirculating direct gas-fired industrial air heaters shall be provided with access for



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removal of burners; for replacement of motors, controls, filters, and other working parts; and foradjustment and lubrication of parts requiring maintenance.

10.8.10 Additional Requirements for Recirculating Direct Gas-Fired Industrial Air Heaters

10.8.10.1* Recirculating direct gas-fired industrial air heaters shall not recirculate room air inbuildings that contain flammable solids, liquids, or gases; explosive materials; or substances thatcan become toxic when exposed to flame or heat.

10.8.10.2 Air to the recirculating direct gas-fired industrial air heater in excess of the minimumventilation air specified on the heater’s rating plate shall be taken from the building, ducteddirectly from outdoors, or a combination of both.



54_PC46.pdf



Sections 10.8 and 10.9 covering the 2 types of gas-fired industrial air heaters are repetitive, and it is recommended that they be combined to extensive delete duplication. This is believed to be reasonable as the requirements are very similar. No changes have been made to the existing requirements in this comment.




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Statement: Sections 10.8 and 10.9 covering the 2 types of gas-fired industrial air heaters are repetitive, so theyhave been combined to delete duplication. The titles for the appliances have been revised to reflectthe name changes in the listing standards. Some requirements were revised to apply to both types ofappliances because they are applicable to both.



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Non-Recirculating Direct Gas-Fired IndustrialAir Heaters

Recirculating Direct Gas-Fired Industrial Air Heaters


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10.8 Non-Recirculating Direct Gas-Fired Industrial Air Heaters Heating and Forced Ventilation Appliancesfor Commerical and Industrial Application .

10.8.1 Application.

Direct Non-recirculating direct gas-fired industrial air heaters of the non-recirculating type heating andforced ventilation appliances for commercial and industrial application shall be listed in accordance withANSI Z83.4/CSA 3.7, Non-Recirculating Direct Gas-Fired Industrial Air Heaters Heating and ForcedVentilation Appliances for Commerical and Industrial Application .


10.8.2.1

Non-recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application shall not serve any area containing sleeping quarters.

10.8.2.2

Non-recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application shall not recirculate room air.


Installation of non-recirculating direct gas-fired industrial air heaters heating and forced ventilationappliances for commercial and industrial application shall comply with10.8.3.1 through 10.8.3.3.

10.8.3.1

Non-recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application shall be installed in accordance with the manufacturer’s instructions.

10.8.3.2

Non-recirculating direct gas-fired industrial air heaters fired heating and forced ventilation appliances forcommercial and industrial application shall be permitted to provide fresh air ventilation.

10.8.3.3

Non-recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application shall be provided with access for removal of burners; for replacementof motors, controls, filters, and other working parts; and for adjustment and lubrication of parts requiringmaintenance.


Non-recirculating direct gas-fired industrial air heaters shall be installed with a clearance from combustiblematerials of not less than that shown on the rating plate and the manufacturer’s instructions.

10.8.5 Air Supply.

All air to the non-recirculating direct gas-fired industrial air heater shall be ducted directly from outdoors.Where outdoor air dampers or closing louvers are used, they shall be verified to be in the open positionprior to main burner operation.

10.8.6 Atmospheric Vents or Gas Reliefs or Bleeds.

Non-recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application with valve train components equipped with atmospheric vents, gasreliefs, or bleeds shall have their vent lines, gas reliefs, or bleeds lead to a safe point outdoors. Means shallbe employed on these lines to prevent water from entering and to prevent blockage from insects andforeign matter. An atmospheric vent line shall not be required to be provided on a valve train componentequipped with a listed vent limiter.


The design of the installation shall include adequate provisions to permit the non-recirculating direct gas-fired industrial air heater heating and forced ventilation appliances for commercial and industrialapplication to operate at its rated airflow without overpressurizing the space served by the heater by takinginto account the structure’s designed infiltration rate, properly designed relief openings, or an interlockedpowered exhaust system, or a combination of these methods.



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10.8.7.1

The structure’s designed infiltration rate and the size of relief opening(s) shall be determined by approvedengineering methods.

10.8.7.2

Louver or counterbalanced gravity damper relief openings shall be permitted. Where motorized dampers orclosable louvers are used, they shall be proved to be in their open position prior to main burner operation.

10.8.8 Purging.



This proposal is an editorial change to use the correct title of the standard.




Reference standard is updated to reflect the current title ofthe standard.




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10.9 Recirculating Direct Gas-Fired Industrial Air Heaters.

10.9.1 Application.

Direct gas-fired industrial air heaters of the recirculating type shall be listed in accordance with ANSIZ83.18, Recirculating Direct Gas-Fired Industrial Air Heaters .


10.9.2.1

Recirculating direct gas-fired industrial air heaters shall not serve any area containing sleeping quarters.

10.9.2.2 *

Recirculating direct gas-fired industrial air heaters shall not recirculate room air in buildings that containflammable solids, liquids, or gases; explosive materials; or substances that can become toxic whenexposed to flame or heat.


Recirculating direct gas–fired industrial air heaters shall be installed in accordance with the manufacturer’sinstructions.


Recirculating direct gas-fired industrial air heaters shall be installed with a clearance from combustiblematerials of not less than that shown on the rating plate and the manufacturer’s instructions.

10.9.5 Air Supply.

Ventilation air to the recirculating direct gas-fired industrial air heater shall be ducted directly from outdoors.Air to the recirculating direct gas-fired industrial air heater in excess of the minimum ventilation air specifiedon the heater’s rating plate shall be taken from the building, ducted directly from outdoors, or a combinationof both. Where outdoor air dampers or closing louvers are used, they shall be verified to be in the openposition prior to main burner operation.


Recirculating direct gas-fired industrial air heaters with valve train components equipped with atmosphericvents, gas reliefs, or bleeds shall have their vent lines, gas reliefs, or bleeds lead to a safe point outdoors.Means shall be employed on these lines to prevent water from entering and to prevent blockage frominsects and foreign matter. An atmospheric vent line shall not be required to be provided on a valve traincomponent equipped with a listed vent limiter.


The design of the installation shall include adequate provisions to permit the recirculating direct gas-firedindustrial air heater to operate at its rated airflow without overpressurizing the space served by the heater,by taking into account the structure’s designed infiltration rate, properly designed relief openings, aninterlocked powered exhaust system, or a combination of these methods.

10.9.7.1


10.9.7.2


10.9.8 Purging.






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54_PC47.pdf



See Comment on Section 10.8. Sections 10.8 and 10.9 covering the 2 types of gas-fired industrial air heaters are repetitive, and it is recommended that they be combined to extensive delete duplication. This is believed to be reasonable as the requirements are very similar. No changes have been made to the existing requirements in this comment.




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Recirculating Direct Gas-Fired Industrial Air Heaters


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10.9 Recirculating Direct Gas-Fired Industrial Air Heaters Heating and Forced Ventilation Appliancs forCommercial and Industrial Application .

10.9.1 Application.

Direct Recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application of the recirculating type shall be listed in accordance with ANSIZ83.18, Recirculating Direct Gas-Fired Industrial Air Heaters.


10.9.2.1

Recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application shall not serve any area containing sleeping quarters.

10.9.2.2*

Recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application shall not recirculate room air in buildings that contain flammablesolids, liquids, or gases; explosive materials; or substances that can become toxic when exposed to flameor heat.


Recirculating direct gas–fired industrial air heaters gas-fired heating and forced ventilation appliances forcommercial and industrial application shall be installed in accordance with the manufacturer’s instructions.


Recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application shall be installed with a clearance from combustible materials of notless than that shown on the rating plate and the manufacturer’s instructions.

10.9.5 Air Supply.

Ventilation air to the recirculating direct gas-fired industrial air heater heating and forced ventilationappliances for commercial and industrial application shall be ducted directly from outdoors. Air to therecirculating direct gas-fired industrial air heater heating and forced ventilation appliances for commercialand industrial application in excess of the minimum ventilation air specified on the heater’s rating plateshall be taken from the building, ducted directly from outdoors, or a combination of both. Where outdoor airdampers or closing louvers are used, they shall be verified to be in the open position prior to main burneroperation.


Recirculating direct gas-fired industrial air heaters heating and forced ventilation appliances forcommercial and industrial application with valve train components equipped with atmospheric vents, gasreliefs, or bleeds shall have their vent lines, gas reliefs, or bleeds lead to a safe point outdoors. Means shallbe employed on these lines to prevent water from entering and to prevent blockage from insects andforeign matter. An atmospheric vent line shall not be required to be provided on a valve train componentequipped with a listed vent limiter.


The design of the installation shall include adequate provisions to permit the recirculating direct gas-firedindustrial air heater heating and forced ventilation appliances for commercial and industrial application tooperate at its rated airflow without overpressurizing the space served by the heater, by taking into accountthe structure’s designed infiltration rate, properly designed relief openings, an interlocked powered exhaustsystem, or a combination of these methods.

10.9.7.1


10.9.7.2




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10.9.8 Purging.



This proposal is an editorial change to use the correct title of the standard.




Reference standard is updated to reflect the current title ofthe standard.




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10.10 Duct Furnaces.

10.10.1 Clearances Application .

The installation of duct

Duct furnaces shall

comply with the following clearance requirements: Listed duct

be listed in accordance with ANSI Z83.8/CSA 2.6, Gas Unit Heaters, Gas Packaged Heaters, Gas UtilityHeaters, and Gas-fired Duct Furnaces.

10.10.2 Clearances.

Duct furnaces shall be installed with clearances of at least 6 in. (150 mm) between adjacent walls,ceilings, and floors of combustible material and the furnace draft hood and shall comply with the following:

Furnaces

(1) Duct furnaces listed for installation at lesser clearances shall be installed in accordance with themanufacturer's installation instructions. '

(2) In no case shall the clearance be such as to interfere with combustion air and accessibility.

Unlisted duct furnaces shall be installed with clearances to combustible material in accordance with theclearances specified for unlisted furnaces and boilers in Table

10.

3.2.2. Combustible floors under unlisted duct furnaces shall be protected in an approved manner.

10.10.2 10.3 Installation of Duct Furnaces.

Duct furnaces shall be installed in accordance with the manufacturers’ instructions.

10.10.3 4 Access Panels.

The ducts connected to duct furnaces shall have removable access panels on both the upstream anddownstream sides of the furnace.

10.10.4 5 Location of Draft Hood and Controls.

The controls, combustion air inlet, and draft hoods for duct furnaces shall be located outside the ducts. Thedraft hood shall be located in the same enclosure from which combustion air is taken.

10.10.5 6 Circulating Air.

Where a duct furnace is installed so that supply ducts carry air circulated by the furnace to areas outsidethe space containing the furnace, the return air shall also be handled by a duct(s) sealed to the furnacecasing and terminating outside the space containing the furnace. The duct furnace shall be installed on thepositive-pressure side of the circulating air blower.

10.10.6 7 Duct Furnaces Used with Refrigeration Systems.

10.10.6 7 .1

A duct furnace shall not be installed in conjunction with a refrigeration coil where circulation of cooled air isprovided by the blower.

Exception: Where the blower has sufficient capacity to overcome the external static resistance imposedby the duct system, furnace, and the cooling coil and the air throughput necessary for heating or cooling,whichever is greater.

10.10.6 7 .2

Duct furnaces used in conjunction with cooling appliances shall be installed in parallel with or on theupstream side of cooling coils to avoid condensation within heating elements. With a parallel flowarrangement, the dampers or other means used to control the flow of air shall be sufficiently tight to preventany circulation of cooled air through the unit.

Exception: Where the duct furnace has been specifically listed for downstream installation.



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10.10.6 7 .3

Where duct furnaces are to be located upstream from cooling units, the cooling unit shall be so designed orequipped as to not develop excessive temperatures or pressures.

10.10.6 7 .4

Where a duct furnace is installed downstream of an evaporative cooler or air washer, the heat exchangershall be constructed of corrosion-resistant materials. Stainless steel, ceramic-coated steel, and analuminum-coated steel in which the bond between the steel and the aluminum is an iron–aluminum alloyare considered to be corrosion resistant. Air washers operating with chilled water that deliver air below thedew point of the ambient air at the duct furnace shall be considered as refrigeration systems.

10.10.7 8 Installation in Commercial Garages and Aircraft Hangars.

Duct furnaces installed in garages for more than three motor vehicles or in aircraft hangars shall be of alisted type and shall be installed in accordance with 9.1.11 and 9.1.12.















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10.10.6.3

Where duct furnaces are to be located upstream from cooling units, the cooling unit shall be so designed orequipped as to not develop excessive temperatures or pressures.


The requirements is vague and unenforceable.




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Statement: The requirement is vague and leads to inconsistent enforcement.



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10.11 Floor Furnaces.


Floor furnaces shall be listed in accordance with ANSI Z21.86/CSA 2.32, Vented Gas-fired Space HeatingAppliances .


The installation of floor furnaces shall comply with the following requirements:

(1) Listed floor Floor furnaces shall be installed in accordance with the manufacturers' installationinstructions.

(2) Unlisted floor furnaces shall not be installed in combustible floors.

(3) Thermostats controlling floor furnaces shall not be located in a room or space that can be separatedfrom the room or space in which the register of the floor furnace is located.

10.11.2 3 Temperature Limit Controls.

10.11.2.1

Listed automatically

Automatically operated floor furnaces shall be equipped with temperature limit controls.

10.11. 2.2

Unlisted automatically operated floor furnaces shall be equipped with a temperature limit control arrangedto shut off the flow of gas to the burner in the event the temperature at the warm air outlet register exceeds350°F (177°C) above room temperature.



10.11.4 5 Placement.

The following provisions apply to furnaces that serve one story:

(1) Floors. Floor furnaces shall not be installed in the floor of any doorway, stairway landing, aisle, orpassageway of any enclosure, public or private, or in an exitway from any such room or space.

(2) Walls and Corners. The register of a floor furnace with a horizontal warm air outlet shall not be placedcloser than 6 in. (150 mm) from the nearest wall. A distance of at least 18 in. (460 mm) from twoadjoining sides of the floor furnace register to walls shall be provided to eliminate the necessity ofoccupants walking over the warm air discharge. The remaining sides shall be a minimum of 6 in.(150 mm) from a wall. Wall register models shall not be placed closer than 6 in. (150 mm) to a corner.

(3) Draperies. The furnace shall be placed so that a door, drapery, or similar object cannot be nearer than12 in. (300 mm) to any portion of the register of the furnace.

10.11.5 6 Bracing.

The space provided for the furnace shall be framed with doubled joists and with headers not lighter than thejoists.

10.11.6 7 Support.

Means shall be provided to support the furnace when the floor register is removed.


The lowest portion of the floor furnace shall have at least a 6 in. (150 mm) clearance from the generalground level. A reduced clearance to a minimum of 2 in. (50 mm) shall be permitted, provided the lower6 in. (150 mm) portion of the floor furnace is sealed by the manufacturer to prevent entrance of water.Where these clearances are not present, the ground below and to the sides shall be excavated to form a“basin-like” pit under the furnace so that the required clearance is provided beneath the lowest portion ofthe furnace. A 12 in. (300 mm) clearance shall be provided on all sides except the control side, which shallhave an 18 in. (460 mm) clearance.



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10.11.8 9 Access.

The space in which any floor furnace is installed shall be accessible by an opening in the foundation notless than 24 in. × 18 in. (610 mm × 460 mm) or by a trapdoor not less than 24 in. × 24 in. (610 mm ×610 mm) in any cross-section thereof, and a passageway not less than 24 in. × 18 in. (610 mm × 460 mm)in any cross-section thereof.

10.11.9 10 Seepage Pan.

Where the excavation exceeds 12 in. (300 mm) in depth or water seepage is likely to collect, a watertightcopper pan, concrete pit, or other suitable material shall be used, unless adequate drainage is provided orthe appliance is sealed by the manufacturer to meet this condition. A copper pan shall be made of not less

than 16 oz/ft2 (4.9 kg/m2) sheet copper. The pan shall be anchored in place so as to prevent floating, andthe walls shall extend at least 4 in. (100 mm) above the ground level with at least a 6 in. (150 mm)clearance on all sides, except on the control side, which shall have at least an 18 in. (460 mm) clearance.

10.11.10 11 Wind Protection.

Floor furnaces shall be protected, where necessary, against severe wind conditions.

10.11.11 12 Upper Floor Installations.

Listed floor Floor furnaces shall be permitted to be installed in an upper floor, provided the furnaceassembly projects below into a utility room, closet, garage, or similar nonhabitable space. In suchinstallations, the floor furnace shall be enclosed completely (entirely separated from the nonhabitablespace) with means for air intake to meet the provisions of Section 9.3, with access for servicing, minimumfurnace clearances of 6 in. (150 mm) to all sides and bottom, and with the enclosure constructed ofPortland cement plaster or metal lath or other noncombustible material.

10.11.12 13 First Floor Installation.

Listed floor Floor furnaces installed in the first or ground floors of buildings shall not be required to beenclosed unless the basements of these buildings have been converted to apartments or sleeping quarters,in which case the floor furnace shall be enclosed as specified for upper floor installations and shall projectinto a nonhabitable space.















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10.12 Food Service Appliance, Floor-Mounted.

10.12.1 Clearance for Listed Application.

Floor-mounted food service appliances shall be listed in accordance with ANSI Z83.11/CSA 1.8, GasFood Service Equipment .

10.12.2 Clearance for Appliances.

Listed floor Floor -mounted food service appliances, such as ranges for hotels and restaurants, deep fatfryers, unit broilers, kettles, steam cookers, steam generators, and baking and roasting ovens, shall beinstalled at least 6 in. (150 mm) from combustible material except that at least a 2 in. (50 mm) clearanceshall be maintained between a draft hood and combustible material. Floor-mounted food service applianceslisted for installation at lesser clearances shall be installed in accordance with the manufacturer’sinstallation instructions. Appliances designed and marked “For use only in noncombustible locations” shallnot be installed elsewhere.

Table 10.2.

10.12. 2 Clearance for Unlisted Appliances.

Unlisted floor-mounted food service appliances shall be installed to provide a clearance to combustiblematerial of not less than 18 in. (460 mm) from the sides and rear of the appliance and from the ventconnector and not less than 48 in. (1.2 m) above cooking tops and at the front of the appliance. Clearancesfor unlisted appliances installed in partially enclosed areas such as alcoves shall not be reduced. Reducedclearances for unlisted appliances installed in rooms that are not partially enclosed shall be in accordancewith

3

.

10.12.3 Mounting on Combustible Floor.

10.12.3.1

Listed floor Floor -mounted food service appliances that are listed specifically for installation on floorsconstructed of combustible material shall be permitted to be mounted on combustible floors in accordancewith the manufacturer’s installation instructions.

10.12.3.2

Floor-mounted food service appliances that are not listed for mounting on a combustible floor shall bemounted in accordance with 10.12.4 or be mounted in accordance with one of the following:

(1) Where the appliance is set on legs that provide not less than 18 in. (460 mm) open space under thebase of the appliance or where it has no burners and no portion of any oven or broiler within 18 in.(460 mm) of the floor, it shall be permitted to be mounted on a combustible floor without special floorprotection, provided at least one sheet metal baffle is between the burner and the floor.

(2) Where the appliance is set on legs that provide not less than 8 in. (200 mm) open space under thebase of the appliance, it shall be permitted to be mounted on combustible floors, provided the floorunder the appliance is protected with not less than 3⁄8 in. (9.5 mm) insulating millboard covered withsheet metal not less than 0.0195 in. (0.5 mm) thick. The preceding specified floor protection shallextend not less than 6 in. (150 mm) beyond the appliance on all sides.

(3) Where the appliance is set on legs that provide not less than 4 in. (100 mm) under the base of theappliance, it shall be permitted to be mounted on combustible floors, provided the floor under theappliance is protected with hollow masonry not less than 4 in. (100 mm) in thickness covered withsheet metal not less than 0.0195 in. (0.5 mm) thick. Such masonry courses shall be laid with endsunsealed and joints matched in such a way as to provide for free circulation of air through the masonry.

(4) Where the appliance does not have legs at least 4 in. (100 mm) high, it shall be permitted to bemounted on combustible floors, provided the floor under the appliance is protected by two courses of4 in. (100 mm) hollow clay tile, or equivalent, with courses laid at right angles and with ends unsealedand joints matched in such a way as to provide for free circulation of air through such masonrycourses, and covered with steel plate not less than 3⁄16 in. (4.8 mm) in thickness.



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10.12.4 Installation on Noncombustible Floor.

10.12.4.1

Listed floor Floor -installed food service appliances that are designed and marked “For use only innoncombustible locations” shall be installed on floors of noncombustible construction with noncombustibleflooring and surface finish and with no combustible material against the underside thereof, or onnoncombustible slabs or arches having no combustible material against the underside thereof.

10.12.4.2

Such construction shall in all cases extend not less than 12 in. (300 mm) beyond the appliance on all sides.

10.12.5 Combustible Material Adjacent to Cooking Top.

Listed and unlisted food Food service ranges shall be installed to provide clearance to combustiblematerial of not less than 18 in. (460 mm) horizontally for a distance up to 2 ft (0.6 m) above the surface ofthe cooking top where the combustible material is not completely shielded by high shelving, warming closet,or other system. Reduced combustible material clearances are permitted where protected in accordancewith Table 10.2.3.

10.12.6 Use with Casters.

Floor-mounted appliances with casters shall be listed for such construction and shall be installed inaccordance with the manufacturer's installation instructions for limiting the movement of the appliance toprevent strain on the connection.


Floor-mounted food service appliances shall be installed level on a firm foundation.

10.12.8* Ventilation.

Means shall be provided to properly ventilate the space in which a food service appliance is installed topermit proper combustion of the gas.

Statement of Problem and Substantiation for Public InputThis proposal is intended to require the appliance to be listed by an organization acceptable to the code official. Listed, as defined in Section 3.2.5 includes a requirement that an approved agency posts the certification record in a public forum which is available to the Authority Having Jurisdiction for verification purposes. Testing, according to Section 301.4.1, does not require the testing agency to provide a listing or approved products and appliances.


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10.13 Food Service Appliances, Counter Appliances.


Food service counter appliances shall be listed in accordance with ANSI Z83.11/CSA 1.8, Gas FoodSrvice Equipment .

10.13.2 Vertical Clearance.

A vertical distance of not less than 48 in. (1.2 m) shall be provided between the top of all food service hotplates and griddles and combustible material.

10.13.2 3 Clearance for Listed Appliances.

Listed food Food service counter appliances such as hot plates and griddles, food and dish warmers, andcoffee brewers and urns, where installed on combustible surfaces, shall be set on their own bases or legsand shall be installed with a minimum horizontal clearance of 6 in. (150 mm) from combustible material,except that at least a 2 in. (50 mm) clearance shall be maintained between a draft hood and combustiblematerial. Food service counter appliances listed for installation at lesser clearances shall be installed inaccordance with the manufacturer's installation instructions.


Unlisted food service hot plates and griddles shall be installed with a horizontal clearance from combustiblematerial of not less than 18 in. (460 mm). Unlisted gas food service counter appliances, including coffeebrewers and urns, waffle bakers, and hot water immersion sterilizers, shall be installed with a horizontalclearance from combustible material of not less than 12 in. (300 mm). Reduced clearances for gas foodservice counter appliances shall be in accordance with Table 10.2.3 . Unlisted food and dish warmers shallbe installed with a horizontal clearance from combustible material of not less than 6 in. (150 mm).

10.13.4 Installation of Unlisted Appliances.

Unlisted food service counter appliances shall not be set on combustible material unless they have legsthat provide not less than 4 in. (100 mm) of open space below the burners and the combustible surface is

protected with insulating millboard at least 1 ⁄ 4 in. (6 mm) thick covered with sheet metal not less than0.0122 in. (0.3 mm) thick, or with equivalent protection.














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10.13.2 Clearance for Listed Appliances.

Listed food service counter appliances such as hot plates and griddles, food and dish warmers, and coffeebrewers and urns, appliances where installed on combustible surfaces, shall be set on their own bases orlegs and shall be be installed with a minimum horizontal clearance of 6 in. (150 mm) from combustiblematerial, except that at least a 2 in. (50 mm) clearance shall be maintained between a draft hood andcombustible material. Food service counter appliances listed for installation at lesser clearances shall beinstalled in accordance with the manufacturer's installation instructions.


The list of examples of food service counter appliances is deleted as a list is never complete. The requirement that the appliances be set on their own bases or legs is deleted as this should be in the manufacturer's instructions.




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Statement: The list of examples of food service counter appliances is deleted as a list is never complete. Therequirement that the appliances be set on their own bases or legs is deleted as this should be in themanufacturer's instructions.



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10.14 Household Cooking Appliances.


Household cooking appliances shall be listed in accordance with ANSI Z21. 1 /CSA 1.1, HouseholdCooking Gas Appliances .

10.14.2 * Installation.

Listed floor Floor -mounted and built-in household cooking appliances shall be installed in accordance withthe manufacturer’s installation instructions.

10.14.2 3 Clearances.


(1) Listed floor Floor -mounted household cooking appliances, where installed on combustible floors, shallbe set on their own bases or legs.

(2) Listed household Household cooking appliances with listed gas room heater sections shall beinstalled so that the warm air discharge side shall have a minimum clearance of 18 in. (460 mm) fromadjacent combustible material. A minimum clearance of 36 in. (910 mm) shall be provided between thetop of the heater section and the bottom of cabinets.



10.14.2.1 Vertical Clearance Above Cooking Top.

Household cooking appliances shall have a vertical clearance above the cooking top of not less than 30 in.(760 mm) to combustible material or metal cabinets. A minimum clearance of 24 in. (610 mm) is permittedwhen one of the following is installed:

(1) The underside of the combustible material or metal cabinet above the cooking top is protected with notless than 1⁄4 in. (6 mm) insulating millboard covered with sheet metal not less than 0.0122 in. (0.3 mm)thick.

(2) A metal ventilating hood of sheet metal not less than 0.0122 in. (0.3 mm) thick is installed above thecooking top with a clearance of not less than 1⁄4 in. (6 mm) between the hood and the underside of thecombustible material or metal cabinet, and the hood is at least as wide as the appliance and iscentered over the appliance.

(3) A listed cooking appliance or microwave oven is installed over a listed cooking appliance andconforms to the terms of the upper appliance’s manufacturer’s installation instructions.





This proposal is intended to eliminate the acceptability of unlisted products in the code, and instead require products to be listed to the applicable American National Standard by an organization acceptable to the code official. Specifying requirements in the code for unlisted products puts additional burden on the installer and authority having jurisdiction to determine if they will permit a product to be installed. If there is not an acceptable standard, the authority having jurisdiction has the option under clause 1.4, Equivalency, to allow unlisted products



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(1) Listed floor-mounted household cooking appliances, where installed on combustible floors, shall be seton their own bases or legs.

(2) Listed household cooking appliances with listed gas room heater sections shall be installed so that thewarm air discharge side shall have a minimum clearance of 18 in. (460 mm) from adjacent combustiblematerial. A minimum clearance of 36 in. (910 mm) shall be provided between the top of the heatersection and the bottom of cabinets.




No such products are available.




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Statement: No such products are currently being manufactured.



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This is not a safety issue, and should not be in the Code.




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Statement: This requirement is included in appliance manufacturer's installation instructions.



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10.15.1 Clearances for Listed Appliances Application .

Listed illuminating

Illuminating appliances shall be

installed

listed in accordance with

the manufacturer's installation instructions.

ANSI Z21.42, Gas-fired Illuminating Appliances .

10.15. 2 2 Clearances for Unlisted Listed Appliances.

10.15.2.1 Enclosed Type.

Clearance shall comply with the following: Unlisted enclosed illuminating appliances installed outdoorsIlluminating appliances shall be installed with clearances in any direction from combustible material of notless than 12 in. (300 mm).

Unlisted enclosed illuminating appliances installed indoors shall be installed with clearances in anydirection from combustible material of not less than 18 in. (460 mm).



(1) Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustiblematerial not less than that specified in Table 10.15.2.2 . The distance from ground level to the base ofthe burner shall be a minimum of 7 ft (2.1 m) where installed within 2 ft (0.6 m) of walkways. Lesserclearances shall be permitted to be used where acceptable to the authority having jurisdiction.

(2) Unlisted open-flame illuminating appliances installed outdoors shall be equipped with a limiting orificeor other limiting devices that maintain a flame height consistent with the clearance from combustiblematerial, as given in Table 10.15.2.2 .

(3) Appliances designed for flame heights in excess of 30 in. (760 mm) shall be permitted to be installed ifacceptable to the authority having jurisdiction. Such appliances shall be equipped with a safety shutoffdevice or automatic ignition.

(4) Unlisted open-flame illuminating appliances installed indoors shall have clearances from combustiblematerial acceptable to the authority having jurisdiction.


Flame Height

Above Burner

Head

(in.) Minimum Clearance

from Combustible

Material

(ft)* Horizontal Vertical 12 2 6 18 3 8 24 3 10 30 4 12



10.15.3

in accordance with the manufacturer's installation instructions.

10.15.3 Mounting on Buildings.

Illuminating appliances designed for wall or ceiling mounting shall be securely attached to substantialstructures in such a manner that they are not dependent on the gas piping for support.




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10.15.4 Mounting on Posts.

Illuminating appliances designed for post mounting shall be securely and rigidly attached to a post. Postsshall be rigidly mounted. The strength and rigidity of posts greater than 3 ft (0.9 m) in height shall be atleast equivalent to that of a 21⁄2 in. (64 mm) diameter post constructed of 0.064 in. (1.6 mm) thick steel or a1 in. Schedule 40 steel pipe. Posts 3 ft (0.9 m) or less in height shall not be smaller than a 3⁄4 in. Schedule40 steel pipe. Drain openings shall be provided near the base of posts where water collecting inside theposts is possible.

10.15.5 Appliance Pressure Regulators.

Where an appliance pressure regulator is not supplied with an illuminating appliance and the service line isnot equipped with a service pressure regulator, an appliance pressure regulator shall be installed in the lineserving one or more illuminating appliances.















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(1) Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustiblematerial not less than that specified inTable 10.15.2.2. The distance from ground level to the base ofthe burner shall be a minimum of 7 ft (2.1 m) where installed within 2 ft (0.6 m) of walkways. Lesserclearances shall be permitted to be used where acceptable to the authority having jurisdiction.

(2) Unlisted open-flame illuminating appliances installed outdoors shall be equipped with a limiting orificeor other limiting devices that maintain a flame height consistent with the clearance from combustiblematerial, as given in Table 10.15.2.2.

(3) Appliances designed for flame heights in excess of 30 in. (760 mm) shall be permitted to be installed ifacceptable to the authority having jurisdiction. approved.

(4) Such appliances shall be equipped with a safety shutoff device or automatic ignition.

(5) Unlisted Clearances to combustible material from unlisted open-flame illuminating appliancesinstalled indoors shall have clearances from combustible material acceptable to the authority havingjurisdiction. shall be approved..


Flame Height

Above Burner

Head

(in.)

Minimum Clearance

from Combustible

Material

(ft)*

Horizontal Vertical

12 2 6

18 3 8

24 3 10

30 4 12




Editorial revisions to use "approved" which is define in the Code.




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Statement: Editorial revisions to use "approved" which is defined in the Code as being acceptable to the AHJ.


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10.17 Infrared Heaters.


Infrared heaters shall be listed in accordance with ANSI Z83.19/CSA 2.35, Gas-fired High IntensityInfrared Heaters , or ANSI Z83.20/CSA 2.34, Gas-fired Tubular and Low Intensity Infrared Heaters.

10.17.2 Support.

Suspended-type infrared heaters shall be fixed in position independent of gas and electric supply lines.Hangers and brackets shall be of noncombustible material. Heaters subject to vibration shall be providedwith vibration-isolating hangers.


The installation of infrared heaters shall meet the following clearance requirements:

(1) Listed heaters Heaters shall be installed with clearances from combustible material in accordance themanufacturer's installation instructions.

(2) Unlisted heaters shall be installed in accordance with clearances from combustible materialacceptable to the authority having jurisdiction.

(3) In locations used for the storage of combustible materials, signs shall be posted to specify themaximum permissible stacking height to maintain required clearances from the heater to thecombustibles.

10.17.3 4 Combustion and Ventilation Air.

10.17.3 4 .1

Where unvented infrared heaters are used, natural or mechanical means shall be provided to supply and

exhaust at least 4 ft3/min/1000 Btu/hr (0.38 m3/min/kW) input of installed heaters.

10.17.3 4 .2

Exhaust openings for removing flue products shall be above the level of the heaters.


Overhead heaters installed in garages for more than three motor vehicles or in aircraft hangars shall be of alisted type and shall be installed in accordance with 9.1.11 and 9.1.12.












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Statement: This revision requires products having an input rating of 400,000 Btu/hr or less to be listed to theapplicable American National Standard by an organization acceptable to the code official. That inputrating is the upper limit of the available standard. If there is not an acceptable standard, the authorityhaving jurisdiction has the option under 1.4, Equivalency, to allow unlisted products to be installed.




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Overhead heaters installed in garages for more than three motor vehicles or in aircraft hangars shall be ofa be listed type and shall be installed in accordance with 9.1.11 and 9.1.12.


Editorial revision to remove unnecessary words.




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Statement: Editorial revision to remove unnecessary words.



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10.18 Open-Top Broiler Units.

10.18.1 Listed Units Application .

Listed For commercial applications, open-top broiler units shall be listed in accordance with ANSIZ83.11/CSA 1.8, Gas Food Service Equipment , and installed in accordance with the manufacturer'sinstallation instructions.


Unlisted For residential applications, open-top broiler units shall be listed in accordance with ANSIZ21.1/CSA 1.1, Household Cooking Gas Appliances , and installed in accordance with the manufacturers’instructions but shall not be installed in combustible material manufacturer's installation instructions .

10.18.3 Protection Above Domestic Units.

Domestic open-top broiler units shall be provided with a metal ventilating hood not less than 0.0122 in.(0.3 mm) thick with a clearance of not less than 1⁄4 in. (6 mm) between the hood and the underside ofcombustible material or metal cabinets. A clearance of at least 24 in. (610 mm) shall be maintainedbetween the cooking top and the combustible material or metal cabinet, and the hood shall be at least aswide as the open-top broiler unit and centered over the unit. Listed domestic open-top broiler unitsincorporating an integral exhaust system and listed for use without a ventilating hood shall not be requiredto be provided with a ventilating hood if installed in accordance with 10.14.2.1(1).

10.18.4 Commercial Units.

Commercial open-top broiler units shall be provided with ventilation in accordance with NFPA 96.
















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10.19 Outdoor Cooking Appliances.


Listed Commercial outdoor cooking appliances shall be listed in accordance with ANSI Z83.11/CSA 1.8,Gas Food Service Equipment , and installed in accordance with the manufacturer's installation instructions.


Unlisted Residential outdoor cooking appliances shall be listed in accordance with ANSI Z21.58/CSA 1.6,Outdoor Cooking Gas Appliances , or ANSI Z21.89/CSA 1.18, Outdoor Cooking Specialty GasAppliances , and installed in accordance with the manufacturer's installation instructions

Commercial outdoor cooking appliances shall be

installed outdoors with clearances to combustible material of not less than 36 in. (910 mm) at the sides andback and not less than 48 in. (1220 mm) at the front. In no case shall the appliance be located underoverhead combustible construction.listed in accordance with ANSI Z83.11/CSA 1.8, Gas Food Service Equipment, and installed in accordancewith the manufacturer's installation instructions.















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Unlisted outdoor cooking appliances shall be installed outdoors with clearances to combustible material ofnot less than 36 in. (910 mm) at the sides and back and not less than 48 in. (1220 mm) at the front. In nocase shall the appliance be located under overhead combustible construction.


The second sentence is proposed to be deleted as it is unnecessarily restrictive. It would not allow an outdoor cooking appliance to be located under a wood eave 50 ft above the appliance. If a specific minimum distance is needed it should be specified.



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10.20 Pool Heaters.


Pool heaters shall be listed in accordance with ANSI Z21.56/CSA 4.7, Gas-fired Pool Heaters .

10.20.2 Location.

A pool heater shall be located or protected so as to minimize accidental contact of hot surfaces by persons.


The installation of pool heaters shall meet the following requirements:

(1) In no case shall the clearances be such as to interfere with combustion air, draft hood or vent terminalclearance and relief, and accessibility for servicing.

(2) A listed pool heater shall be installed in accordance with the manufacturer’s installation instructions.

(3) An unlisted pool heater shall be installed with a minimum clearance of 12 in. (300 mm) on all sides andthe rear. A combustible floor under an unlisted pool heater shall be protected in an approved manner.

10.20.3 4 Temperature or Pressure Limiting Devices.

10.20.3.1

An unlisted pool heater shall be provided with overtemperature protection or overtemperature andoverpressure protection by means of an approved device(s).

10.20.3.2

Where a pool heater is provided with overtemperature protection only and is installed with any device inthe discharge line of the heater that can restrict the flow of water from the heater to the pool (such as acheck valve, shutoff valve, therapeutic pool valving, or flow nozzles), a pressure relief valve shall beinstalled either in the heater or between the heater and the restrictive device.

10.20.4 5 Bypass Valves.

Where an integral bypass system is not provided as a part of the pool heater, a bypass line and valve shallbe installed between the inlet and outlet piping for use in adjusting the flow of water through the heater.

10.20.5 6 Venting.

A pool heater listed for outdoor installation shall be installed with the venting means supplied by themanufacturer and in accordance with the manufacturer’s instructions.










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10.20.3.1

An unlisted pool heater shall be provided with overtemperature protection or overtemperature andoverpressure protection by means of an approved device(s) .


As written, the Authority Having Jurisdiction (AHJ) must approve safety devices that are incorporated into a pool heater. I do not believe that it is reasonable to ask the AHJ to have experteise in appliance safety devices and recommend removal of this unreasonable requirement




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10.21 Refrigerators.


Refrigerators shall be listed in accordance with ANSI Z21.19/CSA 1.4, Refrigerators Using Gas Fuel .

10.21.2 Clearance.

Refrigerators shall be provided with clearances for ventilation at the top and back in accordance with themanufacturers’ instructions. Where such instructions are not available, at least 2 in. (50 mm) shall beprovided between the back of the refrigerator and the wall and at least 12 in. (300 mm) above the top.

10.21.2 Venting or Ventilating Kits Approved for Use with a Refrigerator.

Where an accessory kit is used for conveying air for burner combustion or unit cooling to the refrigeratorfrom areas outside the room in which it is located, or for conveying combustion products diluted with aircontaining waste heat from the refrigerator to areas outside the room in which it is located, the kit shall beinstalled in accordance with the refrigerator manufacturer’s instructions.










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10.22.5 Wall-Type Room Heaters.

Wall-type room heaters shall be listed in accordance with ANSI Z21.86/CSA 2.32, Vented Gas-fired SpaceHeating Appliances , or ANSI Z21.88/CSA 2.33, Vented Gas Fireplace Heaters , and shall be installed inaccordance with the manufacturer's installation instructions, Wall-type room heaters shall not be installed inor attached to walls of combustible material unless listed for such installation.










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In addition, "by the authority having jurisdiction" was removed because "approved" is defined inChapter 3 to already include that. Other requirements were removed that are included in the listingstandards.



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10.25 Unit Heaters.


Unit heaters shall be listed in accordance with ANSI Z83.8/CSA 2.6, Gas Unit Heaters, Gas PAckagedHeaters, Gas Utility Heaters, and Gas-fired Duct Furnaces , and installed in accordance with themanufacturer's installation instructions.

10.25.2 Support.

Suspended-type unit heaters shall be safely and adequately supported, with due consideration given totheir weight and vibration characteristics. Hangers and brackets shall be of noncombustible material.


10.25.2 3 .1 Suspended-Type Unit Heaters.

Suspended-type unit heaters shall meet the following requirements:

(1) A listed unit heater shall Unit heaters shall be installed with clearances from combustible material ofnot less than 18 in. (460 mm) at the sides, 12 in. (300 mm) at the bottom, and 6 in. (150 mm) abovethe top where the unit heater has an internal draft hood, or 1 in. (25 mm) above the top of the slopingside of a vertical draft hood. A unit heater listed for reduced clearances shall be installed in accordancewith the manufacturer’s installation instructions.

(2) Unlisted unit heaters shall be installed with clearances to combustible material of not less than 18 in.(460 mm).

(3) Clearances for servicing shall be in accordance with the manufacturers’ recommendations containedin the installation instructions.



10.25.4 5 Ductwork.

A unit heater shall not be attached to a warm air duct system unless listed and marked for such installation.


Unit heaters installed in garages for more than three motor vehicles or in aircraft hangars shall be of a listedtype and shall be installed in accordance with 9.1.11 and 9.1.12.


This proposal is intended to require the appliance to be listed, as defined in Section 3.2.5 of the Code, to the applicable American National Standard by an organization acceptable to the code official.This proposal is intended to eliminate the acceptability of unlisted products in the code, and instead require products to be listed to the applicable American National Standard by an organization acceptable to the code official. Specifying requirements in the code for unlisted products puts additional burden on the installer and authority having jurisdiction to determine if they will permit a product to be installed. If there is not an acceptable standard, the authority having jurisdiction has the option under clause 1.4, Equivalency, to allow unlisted products to be installed.











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10.26 Wall Furnaces.


Wall furnaces shall be listed in accordance with ANSI Z21.86/CSA 2.32, Vented Gas-fired Space HeatingAppliances .


10.26.1 2 .1

Listed wall Wall furnaces shall be installed in accordance with the manufacturer's installation instructions.Wall furnaces installed in or attached to combustible material shall be listed for such installation.

10.26. 1 2 .2

Unlisted wall furnaces shall not be installed in or attached to combustible material.

10.26.1.3

Vented wall furnaces connected to a Type B-W gas vent system listed only for a single story shall beinstalled only in single-story buildings or the top story of multistory buildings. Vented wall furnacesconnected to a Type B-W gas vent system listed for installation in multistory buildings shall be permitted tobe installed in single-story or multistory buildings. Type B-W gas vents shall be attached directly to a solidheader plate that serves as a firestop at that point and that shall be permitted to be an integral part of thevented wall furnace, as illustrated in Figure 10.26.1.3. The stud space in which the vented wall furnace isinstalled shall be ventilated at the first ceiling level by installation of the ceiling plate spacers furnished withthe gas vent. Firestop spacers shall be installed at each subsequent ceiling or floor level penetrated by thevent.

Figure 10.26.1 2 .3 Installation 2 Installation of Type B-W Gas Vents for Vented Wall Furnaces.

10.26.1 2 .4 3

Direct vent wall furnaces shall be installed with the vent air intake terminal in the outdoors. The thickness ofthe walls on which the furnace is mounted shall be within the range of wall thickness marked on the furnaceand covered in the manufacturers’ installation instructions.



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10.26.1 2 .5 4

Panels, grilles, and access doors that are required to be removed for normal servicing operations shall notbe attached to the building. (For additional information on the venting of wall furnaces, see Chapter 12.)

10.26.2 3 Location.

Wall furnaces shall be located so as not to cause a hazard to walls, floors, curtains, furniture, or doors. Wallfurnaces installed between bathrooms and adjoining rooms shall not circulate air from bathrooms to otherparts of the building.

















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10.26.1.4

Direct vent wall furnaces shall be installed with the vent air intake terminal in the outdoors. The thickness ofthe walls on which the furnace is mounted shall be within the range of wall thickness marked on thefurnace and covered in the manufacturers’ installation instructions. terminal outdoors.


1. An editorial change is recommended in the first sentence.2. Installation in accordance with the manufacturer's installation instructions is required in 10.1.1 for all appliances.It does not need to be repeated here.




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Statement: 1. An editorial change has been made in the first sentence. 2. Installation in accordance with themanufacturer's installation instructions is required in 10.1.1 for all appliances. It does not need to berepeated here.



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10.27 Water Heaters.


Water heaters shall be listed in accordance with ANSI Z21.10.1/CSA 4.1, Gas Water Heaters, Volume I,Storage Water Haters with Input Ratings of 75,000 Btu per Hour or Less , or ANSI Z21.10.3/CSA 4.3, GasWater Heaters, Volume III, Storage Water Haters with Input Ratings Above 75,000 Btu per Hour,Circulating or Instantaneous , and shall be installed in accordance with the manufacturer's installationinstructions.

10.27.2 Location.

Water heater installations in bedrooms and bathrooms shall comply with one of the following:

(1) Water heater shall be installed in a closet equipped with a weather-stripped door with no openings andwith a self-closing device. All combustion air shall be obtained from the outdoors in accordance with9.3.3.

(2) Water heater shall be of the direct vent type.

10.27.1 2 .1 Locations with Airhandlers.

Where a draft hood–equipped water heater is installed in a space containing a furnace or other air handler,the ducts serving the furnace or air handler shall comply with 10.3.7.4.


10.27.2 3 .1

The clearances shall not be such as to interfere with combustion air, draft hood clearance and relief, andaccessibility for servicing. Listed water heaters shall be installed in accordance with the manufacturer'sinstallation instructions.

10.27. 2.2

Unlisted water heaters shall be installed with a clearance of 12 in. (300 mm) on all sides and rear.Combustible floors under unlisted water heaters shall be protected in an approved manner.

10.27.3 4 Pressure Limiting Devices.

A water heater installation shall be provided with overpressure protection by means of an approved, listeddevice a device listed in accordance with ANSI Z21.22/CSA 4.4, Relief Valves for Hot Water SupplySystems , and installed in accordance with the manufacturer’s installation instructions. The pressure settingof the device shall exceed the water service pressure and shall not exceed the maximum pressure rating ofthe water heater.

10.27.4 5 Temperature Limiting Devices.

A water heater installation or a hot water storage vessel installation shall be provided with overtemperatureprotection by means of an approved, listed device installed in accordance with the manufacturer'sinstallation instructions.

10.27.5 6 Temperature, Pressure, and Vacuum Relief Devices.

Temperature, pressure, and vacuum relief devices or combinations thereof, and automatic gas shutoffdevices, shall be installed in accordance with the manufacturer's installation instructions. A shutoff valveshall not be placed between the relief valve and the water heater or on discharge pipes between suchvalves and the atmosphere. The hourly Btu discharge capacity or the rated steam relief capacity of thedevice shall not be less than the input rating of the water heater.

10.27.6 7 Automatic Instantaneous Type: Cold Water Supply.

The water supply to an automatic instantaneous water heater that is equipped with a water flow–actuatedcontrol shall be such as to provide sufficient pressure to properly operate the control when water is drawnfrom the highest faucet served by the heater.

10.27.7 8 * Antisiphon Devices.

Means acceptable to the authority having jurisdiction shall be provided to prevent siphoning in any waterheater or any tank to which a circulating water heater that incorporates a cold water inlet tube is attached.




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10.28 Compressed Natural Gas (CNG) Vehicular Fuel Systems.

The installation of compressed natural gas (CNG) fueling (dispensing) systems shall conform to NFPA 52.Residential CNG fueling appliances shall be listed in accordance with ANSI/CSA NGV 5.1, ResidentialFueling Appliances, and installed in accordance to the appliance manufacturer's installationinstructions. Non-residential CNG fueling appliances shall be listed in accordance with ANSI/CSA NGV5.2, Vehicle Fueling Appliances (VFA) , and installed in accordance to the appliance manufacturer’sinstallation instructions.


ANSI/CSA NGV 5.2, first edition, was published in 2017 and is being incorporated in the 2019 edition of NFPA Standard 52 and the 2021 edition of the International Fuel Gas Code for coverage of non-residential CNG fueling appliances. ANSI/CSA NGV 5.2-listed appliances differ from NGV 5.1 residential appliances in allowable maximum gas input flow rates, allowance for connection to external storage, and other design and performance requirements that applicable to commercial applications and installation locations and that are fully consistent with risk assessment study criteria used in development of NGV 5.1. Like NGV 5.1 appliances, NGV 5.2 appliances only serve as slow-fill refueling systems. All other “refueling systems” that are not ‘appliances’ are covered by NFPA 52 requirements.



Organization: American Gas Association

Street Address:

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Committee:

Committee Statement


Statement: ANSI/CSA NGV 5.2, first edition, was published in 2017 for coverage of non-residential CNG fuelingappliances. ANSI/CSA NGV 5.2-listed appliances differ from NGV 5.1 residential appliances inallowable maximum gas input flow rates, allowance for connection to external storage, and otherdesign and performance requirements that applicable to commercial applications and installationlocations and that are fully consistent with risk assessment study criteria used in development of NGV5.1. Like NGV 5.1 appliances, NGV 5.2 appliances only serve as slow-fill refueling systems. All other“refueling systems” that are not ‘appliances’ are covered by NFPA 52 requirements.



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10.30 Fuel Cell Power Plants.

Fuel cell power plants with a power output of less than 50 kW shall be listed in accorance with ANSI/CSAFC 1, Fuel Cell Technologies - Part 3-100: Stationary Fuel Cell Power Systems - Safety , and installed inaccordance with the manufacturer’s instructions. Fuel cell power plants with a power output of greater than50 kW shall be installed in accordance with NFPA 853.










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10.32 Outdoor Infrared Patio Heater


Outdoor infrared patio heaters for residential and commercial applications shall be listed in accordancewith ANSI Z83.26/CSA 2.27, Gas-fired Outdoor Infrared Patio Heaters , and shall be installed inaccordance with the manufacturer's installation instructions.


10.32.1.1

Outdoor Infrared patio heaters may be suspended overhead, angle mounted overhead, wall mounted, floormounted, or for tabletop use.

10.32.1.2

Outdoor infrared patio heaters may be installed in a shelter with no more inclusive than:

a) walls on all sides, but no overhead cover.

b) within a partial enclosure which includes an overhead cover and not more than two side walls. Theseside walls may be parallel or at right angles to each other.

c) within a partical enclosure which includes and oaverhead cover and three side walls, provided 30percent or more of the horizontal periphery of the enclosure is permanently open.


The proposal is intended to allow for the installation of infrared patio heaters in accordance with the standard (ANSI Z83.26/CSA 2.27) in both residential and commercial applications.








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Statement: The proposal is intended to allow for the installation of outdoor infrared heaters in accordance withthe standard (ANSI Z83.26/CSA 2.27) in both residential and commercial applications.


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Permanently fixed in place outdoor open flame decorative appliances shall be installed in accordance with10.31.1 through 10.31.3.


Listed outdoor Outdoor open flame decorative appliances shall be installed listed in accordance with themanufacturer’s installation instructions.


Unlisted outdoor open flame decorative appliances shall be installed outdoors ANSI Z21.97/CSA2.41, Outdoor Open Flame Decorative Gas Appliances , and shall be installed in accordance with themanufacturer’s installation instructions and with clearances to combustible material of not less than 36 in .(910 mm) from the sides. In no case shall the appliance be located under overhead combustibleconstruction.

10.31. 3 2 Connection to Piping System.

The connection to the gas piping system shall be in accordance with 9.6.1(1), (2), (4), or (5).















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Permanently fixed in place outdoor open flame decorative appliances shall be installed in accordance with10.31.1 through 10.31.3.

10.31.1 Listed Units Installation .

10.31.1.1 Listed outdoor open flame decorative appliances shall be installed in accordance with themanufacturer’s installation instructions.

10.31. 1. 2

Unlisted

Units.

Unlisted

outdoor open flame decorative appliances shall be installed outdoors in accordance with themanufacturer’s installation instructions and with clearances to combustible material of not less than 36 in.(910 mm) from the sides. In no case shall the appliance be located under overhead combustibleconstruction.

10.31.

3

2 Connection to Piping System.

The connection to the gas piping system shall be in accordance with 9.6.1 (1), (2), (4), or (5).


Editorial change to group installation requirements together.




Affiliation: None

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11.3 Safety Shutoff Devices.

Where a safety shutoff device is provided, it shall be checked for proper operation and adjustment inaccordance with the appliance manufacturer’s instructions. Where the device does not function properly tonot turn off the gas supply in the event of pilot outage or other improper operation, it shall be properlyserviced or replaced with a new device.


It is proposed to delete "properly" in 2 locations as it an unenforceable which is discouraged by the NFPA Manual of Style, par.2.2.2.3.




Affiliation: None

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Statement: "Properly" has been deleted in 2 locations as it an unenforceable which is discouraged by the NFPAManual of Style, par.2.2.2.3. Other revisions were made for clarification.


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Public Input No. 77-NFPA 54-2018 [ Chapter 12 ]

Chapter 12 Flue Gas Venting of Appliances

12.1* Minimum Safe Performance.

Venting systems shall be designed and constructed to convey all flue and vent gases to the outdoors.



The term venting has different meanings for gas appliances. There is venting of gas leakage from controls, the venting of gas from a relief valve during an overpressure condition, and venting of products of combustion from appliances. The proposed change clarifies what kind of venting is the scope of this section.




Wed May 23 11:00:13 EDT 2018

Street Address:

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Submittal Date:

Committee:

Committee Statement

Resolution: The term venting is defined as used in this chapter.


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Listed chimneys and vents shall be installed in accordance with Chapter 12 and the manufacturers'installation instructions.


Chimneys are added to make the requirements applicable to all listed venting materials.







Affiliation: None

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Committee Statement


Statement: Chimneys are added to make the requirements applicable to all listed venting materials.



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Listed direct vent appliances shall be installed in accordance with the manufacturer's installationinstructions and with 12.9.3.


Par 12.2.1 requires installation in accordance with the manufacturer's instructions. It is not necessary to restate that in this paragraph.




Affiliation: None

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Committee Statement


Statement: This requirement was added to allow other than through the wall termination for direct ventappliances.


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Listed direct vent appliances shall be installed in accordance with the manufacturer's installationinstructions and 12.9.3 and the manufacturer’s installation instruction if manufacturer supplied vent (MSP) .Special gas vent shall be installed in accordance with the vent manufacturer’s instruction.


The revised verbiage will align the code with current practice of manufacturer providing direct vent terminations or specifying listed vent and terminations. Additionally, Direct Vent Appliances by definition are- Appliances that are constructed and installed so that all air for combustion is derived directly from the outdoors and all flue gases are discharged to the outdoors. This is almost every Cat II, III & IV appliance being installed and many use Special gas vent to vent.


Submitter Full Name: James Molloy

Organization: Centrotherm Eco Ssytems

Street Address:

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Committee:

Committee Statement

Resolution: Revision is not appropriate since the manufacturer’s instructions will apply in all cases. The newsection on special gas vent is already covered in other parts of this code.



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Listed direct vent appliances shall be installed in accordance with the manufacturer's installationinstructions and 12.9.3. Gas vent termination must be at least 12 in. (300 mm) above the anticipated snowlevel. Locate vent termination in such a way that it cannot be blocked by snow.


This addition would address the roof placement of the air intake and exhaust venting for direct vented appliances so that anticipated snow accumulations would be taken in consideration when locating the termination of the vent. This type of specification is quite lacking for direct vented appliances that exit on a roof. Chimneys are very well covered in the code. This should prevent installations of the vent from being placed in roof valleys or too low where anticipated snow levels may cause blockage of the vent and thus potentially cause serious danger to life or property. Because many manufacturers of direct vent appliances as well as local code enforcement refer to NFPA 54 as the standard for installation, this addition merits serious consideration. Thank you.


Submitter Full Name: Diane Badstuebner

Organization: [ Not Specified ]

Street Address:

City:

State:

Zip:

Submittal Date: Mon Mar 19 16:41:05 EDT 2018

Committee:

Committee Statement

Resolution: Anticipated snow levels are unpredictable because of accumulation and drifting. This proposedrequirement would be difficult to enforce.


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Public Input No. 118-NFPA 54-2018 [ Sections 12.3.5, 12.3.6 ]

Sections 12.3.5, 12.3.6


Listed direct vent appliances shall be installed in accordance with the manufacturer's installationinstructions and 12.9.3 1 .


Appliances incorporating integral venting means shall be installed in accordance with the manufacturer'sinstallation instructions and 12.9.1 and 12 . 9.2.


Coordinating PI for our PI to revise section 12.9.



Public Input No. 115-NFPA 54-2018 [Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4] Main PI revisions




Street Address:

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Committee:

Committee Statement


Statement: This requirement was added to allow other than through the wall termination for direct ventappliances.


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Table 12.9.1 Though the Wall Vent Terminal Clearances

Vent Location Direct Vent Terminals Non‐Direct Vent Terminals

A= Clearance above finished grade level, veranda, porch, deck, or balcony

12 in 12 in

B= Clearance to window or door that may be opened

6 in for appliances ≤ 10,000Btu/hr,

9 in (23 cm) for appliances >10,000 Btu/hr and ≤ 50,000Btu/hr,

12 in for appliances > 50,000Btu/hr ≤ 150,000 Btu/hr

In accordance with theappliance manufacturer’sinstructions and in no case lessthan the clearances specifiedfor Non-Direct Vent Terminal> 150,000 Btu/hr

4 ft below or to side of opening; 1 ft above opening

C= Clearance to permanently closed window

No minimum clearance is required1


D= Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal



E= Clearance to unventilated soffit



F= Clearance to outside corner



G= Clearance to inside corner



H= Clearance to each side of center line extended above regulator vent outlet

3 ft within a height 15 ft 3 ft within a height 15 ft

I= Clearance to service regulator vent outlet

3 ft 3ft

J= Clearance to non‐mechanical air supply inlet to building or the combustion air inlet to

Same clearance as specified for B Same clearance as specified for B


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any other appliance

K= Clearance to a mechanical air supply inlet

3 ft above if within 10 ft horizontally

3 ft above if within 10 ft horizontally

L= Clearance above paved sidewalk or paved driveway located on public property

7 ft and cannot be located above public walkways or other areas where condensate or vapor can cause a nuisance or hazard

7 ft and cannot be located above public walkways or other areas where condensate or vapor can cause a nuisance or hazard

M= Clearance to underside of veranda, porch deck, or balcony

12 in 2 12 in 2

For SI units, 1 in. = 25.4 mm, 1 ft. = .3 m, 1 Btu/hr = 0.293 W

Notes: 1. Clearance where specified in the manufacturer’s installation instructions2. Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

Figure 12.9.1 Through the Wall Vent Terminal Clearances


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Appliances incorporating integral venting means shall be installed in accordance with the manufacturer'sinstallation instructions and with 12.9.1 and 12.9.2.


Par. 12.2.1 requires installation in accordance with the manufacturers' instructions. There is no need to repeat that here.




Affiliation: None

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Committee Statement


Statement: Chapter 10 requires installation in accordance with the manufacturers' instructions. There is no needto repeat that here. Section 12.9.1 now incorporates the requirements that were in 12.9.2.



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12.4.1 Appliance Draft Requirements.

A venting system shall satisfy the draft requirements of the appliance in accordance with themanufacturer’s instructions.


The requirements duplicates Par. 12.1.1, Minimum Safe Performance conveys the same requirement and par. 12.2.1 which requires installation in accordance with the manufacturer's instructions.




Affiliation: None

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Committee Statement

Resolution: The committee believes this is not redundant and is necessary in this section.



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12.4.3.1

Mechanical draft systems serving Categoy I applances shall be listed in accordance with UL 378, DraftEquipment, and installed in accordance with both the appliance and the mechanical draft systemmanufacturer's installation instructions.

12.4.3.2 Mechanical draft systems serving Category II, Category III, or Category IV appliances shall belisted and installed in accordance with 12.5.4.1.


Common venting of Category II, Category III, and Category IV appliances is being proposed in a separate proposal to 12.5.4.1. Assuming that proposal is accepted there could be confusion between the requirements of 12.4.3.1 which requires listing to UL 378 and the requirements of 12.5.4, which requires listing to UL 1738. The scope of UL 1738 states “These requirements cover venting systems intended for venting Category II, III, or IV gas-burning appliances”.









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Resolution: PI 153, which proposed to add common venting to 12.5.4.1, was resolved, so the reference is notneeded.



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12.4.3.6

The exit terminals of mechanical draft systems shall be not less than 7 ft (2.1 m) above finished groundlevel where located adjacent to public walkways and shall be located as specified in 12.9.1 and 12.9.2 .


Coordinating PI to our PI to revise 12.9. The provision is included in the new Table 12.9.1 and Figure 12.9.1.



Public Input No. 115-NFPA 54-2018 [Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4] Main PI for revisions




Street Address:

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Committee:

Committee Statement


Statement: This coordinates with the revision in 12.9. The deleted requirement is included in the new Table12.9.1 and Figure 12.9.1.



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12.4.4.1

Where automatically operated appliances, other than commercial cooking food service appliances, arevented through a ventilating hood or exhaust system equipped with a damper or with a power means ofexhaust, provisions shall be made to allow the flow of gas to the main burners only when the damper isopen to a position to properly vent the appliance and when the power means of exhaust is in operation.


Food service appliance is a defined term and commercial cooking appliance is not defined in the Code. Defined terms should be used where applicable.







Affiliation: None

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Committee Statement


Statement: Food service appliance is a term used elsewhere in the code and commercial cooking appliance isnot defined in the Code.



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Category II,

Category III,

and Category IV appliances

As specified or

furnished by Materials as specified by

manufacturers of listed appliances theappliance Manufacturer

12.5.2, 12.5.4


File Name Approved

NFPA_54_-_PI_127_Attachment_1.pdf

NFPA_54_-_PI_127_Attachment_2.pdf

Description

This is part of the Substantiation

This is part of the Substantiation


Currently in the United States plastic flue gas venting is required to meet the appliance standards. The appliance standards mandate that plastic vent materials be tested with the appliance for various scenarios. The temperature of the plastic vent is measured at defined locations with a requirement that the temperature cannot exceed the Heat Deflection Temperature (HDT) for the plastic in question (PVC, ABS and CPVC).

Recently the appliance standards were revised to exclude Cell core PVC and ABS due to concerns with the thin outside layer deteriorating when assembled. In Canada there were incidents involving ABS which prompted ULC S636 to be mandated in the B149 gas Code in 2007. Further, in Canada ABS is no longer permitted as a venting material. ULC S636 has some similarities to UL 1738 but the standards are different. In the United States it appears that there have been reported appliance venting related incidents but details are lacking other than for perhaps a handful of incidents.

Clearly there have been some venting “issues” and the industry has reacted with changes to the appliance standards and the Gas Code in Canada. Attached is a policy statement from the City of Loveland, CO, and information from Charlotte Pipe and Foundry Company on the use of plastic piping materials for gas vents. Also attached are photographs of failures in plastic piping materials used as vents. In addition, the Town of Danvers, MA includes the following with all gas permits:NOTE: (a) Standard schedule 40-PVC is NOT permitted for use as a material to vent products of combustion for furnaces, boilers and water heaters-(see ASTM D-1785 requirements prohibiting this usage). (b) UL-1738-(Listed) venting material-[i.e. polyethylene, CPVC and LISTED schedule-40] is acceptable.

NFPA 54 – 2018 was revised to include a reference to UL 1738 as an option for venting gas fired appliances.

Recent events require that the current 2018 Code language be revisited. Most of the ASTM and CSA standards referenced in the appliance standards for flue gas venting contain restrictions and warnings on the use of these products for venting application. This can create a conflict between the Code and appliance standards with the Code currently providing an option for venting that promotes the use of a product not recommended by the application. The following ASTM and CSA standards contain restrictions and warning related to the products in a flue gas venting application:ASTM D1785-15 : PVC Schedule 40, 80 and 120. ASTM D2441: PVC SDR SeriesASTM F441: CPVC Schedule 40,80 and 120ASTM F442: CPVC SDR SeriesASTM D2661: ABS Schedule 40 DWVASTM D2665: PVC Drain Waste Vent (DWV) Pipe and Fittings


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CSA B137.3: PVC / CPVC Schedule 40, 80 and 120CSA B137.6: CPVC 41CSA B181.1: Schedule 40 DWV

As an example, ASTM D1785-15 (a standard for pressure rated Schedule 40, 80, and 120 PVC pipe intended for use with distribution of pressurized liquids only) states:

“This standard specifies dimensional, performance and test requirements for plumbing and fluid handling applications only. It does not include provisions for the use of these products for venting of combustion gases. UL 1738 is a standard that does include specific testing and marking requirements for flue gas venting products, including PVC."

This proposal is intended to eliminate conflict between the ASTM/CSA standards, the NFPA 54 Code and the appliance standards. Currently products are being permitted which meet ASTM and CSA standards that contain warnings on the products use in a venting application.

In addition, UL 1738 mandates that pipe fittings and cements are to be supplied by one manufacture. The reason for this is that tolerances between pipes and fittings from various manufacturers can result in an improper fit potentially creating a void where leakage can occur.

Further, installation requirements are being proposed to ensure that installers are properly trained and that there is some level of quality is being met. As an example, the table of contents of the IPEX Installation Manual is attached separately, along with examples of vent system failures caused by improper installation. The installation manual can be downloaded from http://www.ipexna.com/media/7306/sys-636-procedures-eng-rev-02-2018b.pdf

Also attached is a comparison of the test requirements of UL 1738 and the relevant appliance test standards. This shows the more stringent requirements of UL 1738 in support of the need to require that it be used.









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Committee Statement

Resolution: The current language allows the manufacturer to supply a gas vent, which is consistent with theappliance standards.



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Installation Methods for IPEX System 636®

Type BH Class IIA (PVC) and Class IIB (CPVC) Gas Venting Systems

A. Examine all components for possible shipping damage prior to installation.

B. Proper joint construction is essential for a safe installation. Follow these instructions exactly as written.

C. This venting system must be free to expand and contract. This venting system must be supported inaccordance with these instructions.

D. Check for proper joint construction when joining pipe to fittings.

E. Check for unrestricted vent movement through walls, ceilings, and roof penetrations.

F. Different manufacturers have different joint systems and adhesives. Do NOT mix pipe, fittings or joining methods from different manufacturers.

System 636 Pipe, Fittings and Cements are certified as a system and must be installed as such.


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System 636 Installation Methods

Table of Contents

Product Application .........................................................1

Limits of Use and Application............................................1

Termination Requirements .................................................3

Support and Restraint Spacing ..........................................7

Expansion and Contraction...............................................8

Firestops .......................................................................11

Appliance Testing ..........................................................11

Vent Connection to the Appliance....................................11

Solvent Welding ............................................................11

Basic Principles ......................................................12Priming .................................................................14Set and Cure Times ................................................16Required Quantities ................................................17Safety Precautions ..................................................18

Handling and Storage....................................................19

Cement and Primer.................................................19Pipe and Fittings ....................................................20

System 636 Statement of the Basis for Acceptance............22

Maintenance.................................................................23

Training........................................................................23

Accessory Installation Instructions ....................................24

Access Tee.............................................................24Low Profile Side Wall Termination Kit........................25 Concentric Vent Termination Kit ................................28


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Comparison of UL 1738 and Appliance Standard Vent Requirements

UL 1738 Paragraph Test Test Description Appliance

Stds. Req. UL 1738

19 Temperature test of the surrounding structure

In both a vertical and horizontal structure the thermoplastic material is tested at a minimum of 38°C (ambient) above the rating of the vent system. The temperature the surrounding structure cannot exceed 65°C on the exposed surface and 50°C on concealed surfaces

YES* YES**

21 Vertical support A static load is applied equal to 4x the heaviest assembly, for 1 hour duration. NO YES

22 Strength 22.1 Impact Horizontal and Vertical assemblies incorporating at least three sections of

pipe are to be impacted three times using a sand bag. No breaking, disassembly, or any damage allowed. Weight of sand bag is either 20lbs or 50 lbs depending on pipe diameter.

YES 50 lb. only

YES

22.2 longitudinal force A force of 100 pounds applied for 5 minutes in an attempt to pull apart two companion parts, No breaking, disassembly, or any damage allowed. NO YES

22.3 load test for vent elbow

Apply 4x the weight of the system or 10 pounds whatever is greater for 5 minutes. No breaking, disassembly, or any damage allowed. NO YES

22.4 vent joint load test Apply 4x the weight of the system or 10 pounds whatever is greater for 5 minutes. No breaking, disassembly, or any damage allowed. NO YES

23 Wind Load 23.1 Test on roof

assembly Vent exposed above the roof line has a load equivalent to 30 pounds per sq' of exposed area applied for 60 minutes. No breaking, disassembly, or any damage allowed.

NO YES

23.2 Test on lateral supports

Vent exposed outside the wall line has a load equivalent to 30 pounds per sq' of exposed area applied for 60 minutes. No breaking, disassembly, or any damage allowed.

NO YES

24 Rain Test Vents are exposed to a water spray configuration as per the standard at 5 psi water pressure. Max allowable water entering the vent system is 2% of the total without the vent cap installed.

NO YES

28 Vent Sag - Horizontal Installation

Horizontal installation with max allowable spacing/joints between supports shall not sag more than 6.25% of the diam. when subject to the rated temperature from Test 19 plus 38.8°C. Run for 3 hrs or until equilibrium.

NO YES

29 Puncture Test Plunger shall not penetrate the wall when dropped from 20" above the outer wall surface. Plunger consists of 3/8" steel rod with a 9/16" diameter head at the end and the overall assembly weighs 2lbs.

NO YES

32 Pressure Test Assembly including fittings to be subject to a pressure of 311 Pa or 2.5 times the maximum rated pressure as per client. Tested for 1hr. NO YES

33 Leakage Test Assembly will include fittings/typical joint placed under a pressure of 124 Pa for 1hr. The assembly volume will be calculated and the amount of air used to maintain pressure is not to exceed 20 times the volume of the sample.

YES YES

35 Joint Tightness A torque of 25 ft-lb is applied to the various pipe/fitting assemblies, No breaking, disassembly, or any damage allowed. NO YES

37 Low Temperature Handling

Samples are cooled for 5 hr. @- 20deg C, once removed samples are dropped at a height of 60" on to a concrete floor twice (once at 45 deg angle and once parallel to the floor). Samples shall not chip, crack, break or be damaged.

NO YES

38 Water Absorption

Conditioned at @ 50°C for 24 hr, then remain at 23°C for 24hr. Samples are then submerged in distilled water for 24 hrs. Weight before and after water submersion must not exceed a 1.5 percent gain.

NO YES

*Vent is tested at maximum vent length and clearances to combustibles specified by appliance manufacturer. When maximumvent temperature is attained, temperature of embedded thermal couples can’t exceed HDT temperature of vent material. **Vent is subject to rated temperature of vent plus ambient (38.8°C). A PVC vent is subject to a total vent test temperature of

s of mechanical test to ensure vent is still viable after exposure to high vent temperature.


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UL 1738 Paragraph Test Test Description Appliance

Stds. Req. UL 1738

40 Polymeric materials

40.2 Elevated Temp Conditioning

Subject to an Elevated temperature as specified in section 19.2, at 30,60,90 and 180 day evaluations for the following are conducted; Tensile, Shall be retained >=70 % of its original value (Per ASTM D638) Impact(Only on Plaques), Shall be retained >=70 % of its original value (Per ASTM D5420) Flammability, For use <=60°C: shall comply to Class V-0 (UL94) For use >60°C: shall comply to Class 5VA or 5VB (UL94) Pipe Deflection and stiffness (only on pipe), Shall be retained >=50 % of its original pipe deflection and stiffness

NO YES

40.3 Light & water

Subject to Xenon-arc lamp and conditioning of 102 minutes of light followed by 18 minutes of light and water spray. @360 hours samples are evaluate for; Tensile, Shall be retained >=70 % of its original value (Per ASTM D638) Impact, Shall be retained >=70 % of its original value (Per ASTM D5420) Flammability, For use <=60°C: shall comply to Class V-0 (UL94) For use >60°C: shall comply to Class 5VA or 5VB (UL94)

NO YES

40.4 Condensate Conditioning

Samples are immersed in the specified solution for 30,60,90 and 180 day evaluations of; Tensile, Shall be retained >=50% of its original value (Per ASTM D638) Impact (Only on Plaques), Shall be retained >=50 % of its original value (Per ASTM D5420) Flammability(Only on Plaques), For use <=60°C: shall comply to Class V-0 (UL94) For use >60°C: shall comply to Class 5VA or 5VB (UL94) Pipe Deflection and stiffness (only on pipe), Shall be retained >=50 % of its original pipe deflection and stiffness

NO YES

42 Polymeric Materials Physical 42.2 Tensile-baseline As per ASTM D638 and section 40.2 - 4.03 above NO YES

42.3 Impact-baseline As per ASTM D5420 and section 40.2 - 4.03 above NO YES

42.4 pipe deflection baseline

As per ASTM D2412 and section 40.2 – 40.3 above 42.5 flammability baseline NO YES

42.5 Flammability baseline

As per UL 94 and section 40.2 – 40.3 above NO YES

43 Deflection Temp Load Test

Deflection temperature shall be at least 10°C above the use temperature form section 19.2 but not less than 70°C when tested as per ASTM D648. NO YES

44 Internal stress Average Internal residual stress for straight section of pipe shall be less then 300psi, but a positive number. NO YES

45Product Marking

Marking on the vent product to include the following: Minimum clearance to combustible materials Direction of intended flow

NO YES

47InstallationInstructions

Instructions for venting to include but not limited to (section 47 has 25 requirements for the installation instructions:

Safety alert warning if the instructions are not adhered to Details on unpacking, damage and the consequences, expansion and

contraction, no mixing of components from different manufacturers

NO YES


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12.5.1

Category II,

Category III,

and Category IV appliances

As

specifiedsupplied by manufacturer or

. furnished by

manufacturers of listedappliancesSpecial gas vent specified bymanufacturer

12.5.2, 12.5.4

Incinerators

Direct vent

appliances

As supplied by manufacturer or

Special gas vent specified bymanufacturer

12.3.5


Aligns with changes made in other sections,whereby:Special Gas Vent is defined in paragraph 12.5.4 of the code as being listed to UL-1738 and should be the term utilized consistently in all other locations to eliminate confusion. Additionally, the revised verbiage eliminates existing conflicts with and aligns the code to the ANSI appliance standards.ANSI Z21.10.3 Gas Water Heaters Paragraphs 1.2.9, 1.2.21b., 1.2.23, 1.29.2, 1.30.2d. and other areas where supplied vent or specific types listed by a nationally recognized testing agency are referenced.ANSI Z21.13 Gas Fired Boilers Paragraphs 4.1.10, 4.1.12, 4.27.3, 4.27.4, 4.27.5, 4.31.2, 4.33.1b)xvi)1) & 2), 4.35.12 and other areas where supplied vent or specific types listed by a nationally recognized testing agency are referenced.ANSI Z21.47 Gas Fired central furnaces Paragraphs 3 Definitions Type MSP, 4.1.24c), 4.1.25, 4.14.16, 4.14.17, 4.14.18, 4.14.24, 4.23.6d)&j) and other areas where supplied vent or specific types listed by a nationally recognized testing agency are referenced.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement

Resolution: The current language allows the manufacturer to specify a vent material that is not listed as a specialvent, which is consistent with the appliance standards.


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12.5.2 Plastic Piping.

Where plastic piping is used to vent an appliance, the appliance shall be listed for use with such ventingmaterials and the appliance manufacturer's installation instructions shall identify the specific plastic pipingmaterial. The plastic pipe venting materials system shall be labeled in accordance with the productstandards specified by the appliance manufacturer or shall be listed and labeled in accordance withANSI/UL 1738, Venting Systems for Gas-Burning Appliances, Categories II, III, and IV.


See Substantiation to PI 127 on Table 12.5.1.









Street Address:

City:

State:

Zip:


Committee:

Committee Statement

Resolution: The committee wishes to maintain the current language of allowing the appliance manufacturer tospecify the appropriate materials. The CSA gas appliance standards require testing of the ventmaterial with the appliance certification.



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12.5.2 Plastic Piping.

Where plastic piping is used to vent to vent an appliance, the appliance shall be listed appliance shall belisted for use with such venting materials and . The materials shall be supplied by the appliancemanufacturer 's installation instructions shall identify the specific plastic piping material or be Special gasvent specified by the appliance manufacturer . The plastic pipe venting materials material shall be labeledin accordance with the product standards specified supplied by the appliance manufacturer or shall belisted and labeled in accordance with ANSI/UL 1738, Venting Systems for Gas-Burning Appliances,Categories II, III, and IV Special gas vent .


Special Gas Vent is defined in paragraph 12.5.4 of the code as being listed to UL-1738 and should be the term utilized consistently in all other locations to eliminate confusion. Additionally, the revised verbiage eliminates the current conflicts between the NFGC and ANSI Standards by aligning the code with the ANSI appliance standards.ANSI Z21.10.3 Gas Water Heaters Paragraphs 1.2.9, 1.2.21b., 1.2.23, 1.29.2, 1.30.2d. and other areas where supplied vent or specific types listed by a nationally recognized testing agency are referenced.ANSI Z21.13 Gas Fired Boilers Paragraphs 4.1.10, 4.1.12, 4.27.3, 4.27.4, 4.27.5, 4.31.2, 4.33.1b)xvi)1) & 2), 4.35.12 and other areas where supplied vent or specific types listed by a nationally recognized testing agency are referenced.ANSI Z21.47 Gas Fired central furnaces Paragraphs 3 Definitions Type MSP, 4.1.24c), 4.1.25, 4.14.16, 4.14.17, 4.14.18, 4.14.24, 4.23.6d)&j) and other areas where supplied vent or specific types listed by a nationally recognized testing agency are referenced.




Street Address:

City:

State:

Zip:


Committee:

Committee Statement

Resolution: Product standards would not be supplied by the appliance manufacturer. The committee does notagree that vent material needs to be supplied by the appliance manufacturer or be special gas ventas the only options. The CSA gas appliance standards require testing of the vent material with theappliance certification.



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12.5.3 Plastic Vent Joints.

Plastic pipe and fittings used provided by appliance manufacturers to vent appliances shall be installed inaccordance with the appliance manufacturer's manufacturer’s installation instructions. Plastic pipe ventingmaterials listed and labeled in accordance with ANSI/UL 1738, Venting Systems for Gas-BurningAppliances, Categories II, III, and IV , Special gas vent shall be installed in accordance with the ventmanufacturer's manufacturer’s installation instructions. Where primer is required, it shall be of acontrasting color.


Special Gas Vent is defined in paragraph 12.5.4 of the code as being listed to UL-1738 and should be the term utilized consistently in all other locations to eliminate confusion.




Street Address:

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Committee:

Committee Statement

Resolution: This change would allow plastic pipe and fittings not provided by the appliance manufacturers to notbe installed in accordance with the installation instructions.



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12.5.4.1 Appliances that operate at a positive vent pressure shall not be connected to a common ventserving any other appliance, except where all of the following conditions are met:

(a) All appliances connected to the common vent shall be listed for use as common venting.

(b) All the appliances sharing the vent shall be manufactured by the same company.

(c) The common venting system shall be a listed special gas vent sized by the appliance manufacturer or inaccordance with instructions provide by the appliance manufacturer for common venting

(d) The common venting components shall be supplied by the appliance manufacturer or shall be inaccordance with appliance installation instructions.

(e) A backflow prevention device shall be installed in the common vent where each appliance is connectedand is installed in accordance with the appliance or vent manufacturer’s installation instructions. Thebackflow prevention device shall have a means to verify operation.


This proposal revises the Code to specifically allow limited common venting of listed Category III and IV appliances. The use of common venting for these appliances has been recognized in the ANSI appliance standards (Z21.10.1/CSA 4.1, Z21.10.3/CSA 4.1, Z21.13/CSA 4.9, and Z21.47/CSA 2.3) for at least 10 years and installations using this method have been operating successfully for that time period. In order to be common vented, Category III and IV appliances must be listed and manufactured by the same company. This ensures that the common vent will operate properly and not spill when one or all the appliances are operating.

Common venting of Cate gory III and Category IV appliances will result in simpler and more efficient installations by removing the need for parallel runs of vent piping and multiple building penetrations.

A back flow prevention device is required so that vent gases, which can include carbon monoxide to not spill into the room if an appliance is removed for servicing, replacement, or if it is no longer used. The backflow device is required to be installed as part of the vent so that the device will be in place and prevent backflow of exhaust if the appliance is removed.

To avoid possible confusion between common vents serving positive pressure Category III and IV appliances and mechanical draft systems, a proposal has been submitted to revise 12.4.3.1 to recognize such systems and to require their listing under UL 1738 and not UL 378.









Street Address:

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Committee:


Committee Statement

Resolution: The committee does not agree with the addition of common venting of positive pressure appliances.Appliances are not currently listed for common venting. The committee does not share the belief ofonly relying on backflow prevention.


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12.6.1.1

Factory-built chimneys shall be listed in accordance with ANSI/UL 103, Chimneys, Factory-Built,Residential Type and Building Heating Appliances; ANSI/UL 959, Medium Heat Appliance Factory-BuiltChimneys; or ANSI/UL 2561, 1400 Degree Fahrenheit Factory-Built Chimneys. Factory-built chimneysshall be installed in accordance with the manufacturer's installation instructions. Factory-built chimneysused to vent appliances that operate at positive vent pressure shall be listed for such application.


As factory built chimneys are required to be listed, there is no need to restate here that they must be installed in accordance with the manufacturer's installation instructions, which is covered in 12.2.1. A separate proposal has been submitted to require that 12.2.1 be revised to include listed factory built chimneys.







Affiliation: None

Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: As factory built chimneys are required to be listed, there is no need to restate here that they must beinstalled in accordance with the manufacturer's installation instructions, which is covered in 12.2.1.



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12.6.3.1

The effective area of a chimney venting system serving listed appliances with draft hoods, Category Iappliances, and other appliances listed for use with Type B vents shall be in accordance with one of thefollowing methods:

(1) Those listed in Chapter 13.

(2) For sizing an individual chimney venting system for the effective areas of the vent connector andchimney flue of a venting system serving a single appliance with a draft hood , the effective areas ofthe vent connector and chimney flue shall be not less than the area of the appliance flue collar or drafthood outlet or greater than seven times the draft hood outlet area.

(3) For sizing a chimney venting system connected to two appliances with draft hoods, the the effectivearea of the chimney flue of a venting system serving multiple appliances shall be not less than thearea of the larger draft hood outlet plus 50 percent of the area of the smaller draft hood outlet orgreater than seven times the smaller draft hood outlet area.




Editorial revisions. Starting a sentence with "for" is poor grammar.







Organization: [email protected]

Affiliation: None

Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: This section is revised for clarity.



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12.6.9 Insulation Shield.

Where a factory-built chimney passes through insulated assemblies, an insulation shield constructed ofsteel having a minimum thickness of 0.0187 in. (0.4712 mm) (nominal 26 gage) shall be installed to provideclearance between the chimney and the insulation material. The clearance shall not be less than theclearance to combustibles specified by the chimney manufacturer's installation instructions. Wherechimneys pass through attic space, the shield shall terminate not less than 2 in. (51 mm) above theinsulation materials and shall be secured in place to prevent displacement. Insulation shields provided aspart of a listed chimney system shall be installed in accordance with the manufacturer's installationinstructions.


The last sentence duplicates the requirement in 12.2.1.




Affiliation: None

Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: The last sentence duplicates the requirement in 12.2.1.



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12.7.4.1* Category I Appliances.

The sizing of natural draft venting systems serving one or more listed appliances equipped with a drafthood or appliances listed for use with a Type B gas vent, installed in a single story of a building, shall be inaccordance with one of the following:

(1) The provisions of Chapter 13.

(2) Vents serving fan-assisted combustion system appliances, or combinations of fan-assisted combustionsystem and draft hood–equipped appliances, shall be sized in accordance with Chapter 13 or otherapproved engineering methods.

(3) For sizing an individual gas vent for a single, draft hood–equipped appliance, the effective the area ofthe vent connector and the gas vent serving a single draft hood-equipped appliance shall be not lessthan the area of the appliance draft hood outlet or greater than seven times the draft hood outlet area.

(4) For sizing a gas vent connected to two appliances with draft hoods, the effective the area of the ventserving two appliances shall be not less than the area of the larger draft hood outlet plus 50 percent ofthe area of the smaller draft hood outlet or greater than seven times the smaller draft hood outlet area.

(5) Other approved engineering practices.


1. Editorial revisions. Starting a sentence with "for" is poor grammar.2. "Effective area" is changed to "area" as effective area is neither defined or explained.







Affiliation: None

Street Address:

City:

State:

Zip:


Committee:

Committee Statement

Resolution: The editorial revisions do not add clarity to this section.



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12.7.5.1

Where A common vent shall be permitted is installed in a multistory installations installation to ventCategory I appliances located on more than one floor level, provided the venting system is shall bedesigned and installed in accordance with approved engineering methods. For the purpose of this section,crawl spaces, basements, and attics shall be considered floor levels.


The first sentence is revised to be a mandtory requirement. The current sentence is not a mandatory requirement. The NFPA Manual of Style, paragraph 2.3.3.1 states; "Where a sentence in a code or standard does not contain a mandatory requirement, it shall be rewritten to include a mandatory requirement or the sentence shall be moved to Annex A or deleted".The second sentence is an interpretation, and does not belong in the Code. If needed, it can be retained in Annex A.




Affiliation: None

Street Address:

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State:

Zip:


Committee:

Committee Statement


Statement: The first sentence is revised to be a mandatory requirement.



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12.7.7 Marking.

In those localities where where solid and liquid fuels are used extensively , gas vents shall bepermanently identified by a label attached to the wall or ceiling at a point where the vent connector entersthe gas vent. The label shall read: “This gas vent is for appliances that burn gas. Do not connect to solid orliquid fuel–burning appliances or incinerators.” The authority having jurisdiction shall determine whether itsarea constitutes such a locality.


The requirement is simplified. Where both gas and solid fuel appliances are installed in the same building, the requirement should apply. There is no need to place a responsibility on the AHJ in this determination.




Affiliation: None

Street Address:

City:

State:

Zip:


Committee:

Committee Statement

Resolution: The committee does not want to remove the term localities to identify appropriate jurisdictions. Inaddition, the AHJ should continue to determine where it applies.



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12.8.4.6

Single-wall metal pipe shall not pass through a combustible exterior wall unless guarded at the point ofpassage by a ventilated metal thimble not smaller than the following:

(1) For listed A thimble listed for use with listed appliances with draft hoods and appliances listed for usewith Type B gas vents, the thimble shall be a minimum of 4 in. (100 mm) larger in diameter than themetal pipe. Where there is a run of not less than 6 ft (1.8 m) of metal pipe in the opening between thedraft hood outlet and the thimble, the thimble shall be a minimum of 2 in. (50 mm) larger in diameterthan the metal pipe.

(2) For An unlisted thimble used with unlisted appliances having draft hoods , the thimble shall be aminimum of 6 in. (150 mm) larger in diameter than the metal pipe.

(3) For A thimblle used with residential and low-heat appliances , the thimble shall be a minimum of12 in. (300 mm) larger in diameter than the metal pipe.

Exception: In lieu of thimble protection, all combustible material in the wall shall be removed asufficient distance from the metal pipe to provide the specified clearance from such metal pipe tocombustible material. Any material used to close up such opening shall be noncombustible.


Editorial revision. It is not good grammar to start a sentence with "for".








Affiliation: None

Street Address:

City:

State:

Zip:


Committee:

Committee Statement

Resolution: The committee does not wish to add the requirement that a thimble be listed. The proposed change ismore than editorial.



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12.8.4.6

Single-wall metal pipe shall not pass through a combustible exterior wall unless guarded at the point ofpassage by a ventilated metal thimble not smaller than the following:

For listed appliances with draft hoods and appliances listed for use with Type B gas vents, the thimble shallbe a minimum of 4 in. (100 mm) larger in diameter than the metal pipe.

Appliance type

Thimble Size:

Inches (mm) larger than thediameter of the metal pipe

Installation condition

Listed appliances withdraft hoods

4” (100 mm)

2” (50 mm) Where there is a run of not less than

6 ft

6 ft (1.

8 m

8 m ) of metal pipe in the opening between the draft hood outlet and the thimble

, the thimble shall be a minimum of 2 in. (50 mm) larger in diameter than the metal pipe.

For unlisted appliances having draft hoods, the thimble shall be a minimum of 6 in. (150 mm) larger indiameter than the metal pipe.For residential and low-heat appliances, the thimble shall be a minimum of 12 in. (300 mm) larger indiameter than the metal pipe.

Unlisted appliances with draft hoods 6” (150 mm)

Residential and low-heat. 12” (300 mm)

Exception: In lieu of thimble protection, all combustible material in the wall shall be removed a sufficientdistance from the metal pipe to provide the specified clearance from such metal pipe to combustiblematerial. Any material used to close up such opening shall be noncombustible.


It is proposed to revised (1) through (3) into a table for ease of use.



Public Input No. 57-NFPA 54-2018 [Section No. 12.8.4.6] Optional revision




Affiliation: None

Street Address:

City:



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State:

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Committee:

Committee Statement

Resolution: Revising into a new table does not add clarity.



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Public Input No. 115-NFPA 54-2018 [ Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4 ]

Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4

12.9.1

A mechanical draft venting system shall terminate at least 3 ft (0.9 m) above any forced air inlet locatedwithin 10 ft (3 m).

Exception No. 1: This provision shall not apply to the combustion air intake of a direct vent appliance.

Exception No. 2: This provision shall not apply to the separation of the integral outdoor air inlet and fluegas discharge of listed outdoor appliances.

12.9.2

A mechanical draft venting system of other than direct vent type shall terminate at least 4 ft (1.2 m) below,4 ft (1.2 m) horizontally from, or 1 ft (300 mm) above any door, operable window, or gravity air inlet into anybuilding. The bottom of the vent terminal shall be located at least 12 in. (300 mm) above finished groundlevel.

12.9.3

The clearances The clearance for through-the-wall direct vent and non-direct vent terminals shall be inaccordance with Table 12.9. 3. The bottom of the vent terminal and the air intake shall be located not lessthan 12 in. (300 mm) above finished ground level.

Table 12.9.3 Through-the-Wall Direct Vent Termination Clearances.

Direct Vent Appliance

Input Rating: Through the Wall Vent Terminal Clearance from any Air Opening into aBuilding: 10,000 Btu/hr (3kW) and less 6 in. (150 mm) Greater than 10,000 Btu/hr (3kW) and not exceeding50,000 Btu/hr (14.7kW) 9 in. (230 mm) Greater than 50,000 Btu/hr (14.7kW) and not exceeding150,000 Btu/hr (29.4kW) 12 in. (300 mm) > 150,000 Btu/hr (29.4kW) In accordance with the appliancemanufacturer’s instructions and in no case less than the clearances specified in 12.9.2

12.9.4

Through-the-wall vents for Category II and Category IV appliances and noncategorized condensingappliances shall not terminate over public walkways or over an area where condensate or vapor couldcreate a nuisance or hazard or could be detrimental to the operation of regulators, relief valves, or otherequipment. Where local experience indicates that condensate is a problem with Category I and Category IIIappliances, this provision shall also apply. Drains for condensate shall be installed in accordance with theappliance and vent manufacturers' installation instructions 1 and Firgure 12.9.1.

Exception. The table clearance shall not apply to the combustion air intake of a direct vent appliance .



Table_and_Figure_12-9-1.docx Table and Figure 12.9.1


The revisions would coordinate with the figure and clearances contained in the ANSI product standards. In addition, the clearances to vent terminals is expanded to cover commonly encountered installation situations such as inside corners, locations under decks and balconies, regulator vents, soffits, etc. The condensate drain requirement is being relocated to section 12.10 (see coordinating PI).



Public Input No. 116-NFPA 54-2018 [Section No. A.12.9] Replaces Annex A firgure

Public Input No. 117-NFPA 54-2018 [Section No. 12.10] Coordinating chagnes



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Public Input No. 116-NFPA 54-2018 [Section No. A.12.9]


Public Input No. 118-NFPA 54-2018 [Sections 12.3.5, 12.3.6]





Street Address:

City:

State:

Zip:


Committee:

Committee Statement


Statement: This revision coordinates the figure with clearances contained in the ANSI product standards. Inaddition, the clearances to vent terminals is expanded to cover commonly encountered installationsituations such as inside corners, locations under decks and balconies, regulator vents, soffits, etc.The condensate drain requirement is being relocated to section 12.10 (see First Revision).



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12.9.3

The clearances for through-the-wall direct vent terminals shall be in accordance with Table 12.9.3. Thebottom of the vent terminal and the air intake shall be located not less than 12 in. (300 mm) above finishedground level and should be 12" above highest expected snow accumulation (consult your local buildingauthorities or local weather office) .

Table 12.9.3 Through-the-Wall Direct Vent Termination Clearances.

Direct Vent Appliance

Input Rating:

Through the Wall Vent Terminal Clearance fromany Air Opening into a Building:

10,000 Btu/hr (3kW) and less 6 in. (150 mm)

Greater than 10,000 Btu/hr (3kW) and notexceeding 50,000 Btu/hr (14.7kW)

9 in. (230 mm)

Greater than 50,000 Btu/hr (14.7kW) and notexceeding 150,000 Btu/hr (29.4kW)

12 in. (300 mm)

> 150,000 Btu/hr (29.4kW) In accordance with the appliance manufacturer’sinstructions and in no case less than the clearancesspecified in 12.9.2


This addition would address the placement of the air intake and exhaust venting for direct vented appliances so that anticipated snow accumulations would be taken in consideration when locating the termination of the vent. This type of specification is quite lacking for direct vented appliances that exit on a roof. Chimneys are very well covered in the code. This should prevent installations of the vent from being placed in roof valleys or too low where anticipated snow levels may cause blockage of the vent and thus potentially cause serious danger to life or property. Because many manufacturers of direct vent appliances as well as local code enforcement refer to NFPA 54 as the standard for installation, this addition merits serious consideration. Thank you.


Submitter Full Name: Diane Badstuebner

Organization: [ Not Specified ]

Street Address:

City:

State:

Zip:

Submittal Date: Mon Mar 19 15:59:57 EDT 2018

Committee:

Committee Statement

Resolution: Anticipated snow levels are unpredictable because of accumulation and drifting. This proposedrequirement would be difficult to enforce. In addition, the submitter's substantiation cites roof valleys,and this section applies to sidewall termination.



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12.10 Condensation Drain.

12.10.1

Provision shall be made to collect and dispose of condensate from venting systems serving Category II andCategory IV appliances and noncategorized condensing appliances in accordance with 12.9.4 .

12.10.2

Where local experience indicates that condensation is a problem, provision shall be made to drain off anddispose of condensate from venting systems serving Category I and Category III appliances in accordancewith 12.9.4 . . Drains for condensate shall be installed in accordance with the appliance and ventmanufacturers' installation instructions.


This PI coordinates with our PI to revise section 12.9. The references in 12.10.1 and 12.10.2 are no longer needed if that PI moves forward. The revised 12.9 would also add into the new table 12.9.1 the nuisance or hazard consideration and therefore section 12.10.2 is no longer needed. The requirement that drains be in accordance with the manufacturer's instructions is currently in 12.9.4 and is relocated to the more appropriate section 12.10.



Public Input No. 115-NFPA 54-2018 [Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4] Main PI revision

Public Input No. 115-NFPA 54-2018 [Sections 12.9.1, 12.9.2, 12.9.3, 12.9.4]




Street Address:

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Committee:

Committee Statement


Statement: This revision coordinates with the revision to section 12.9. The references in 12.10.1 and 12.10.2 areno longer needed. The revised 12.9 also adds into the new table 12.9.1 the nuisance or hazardconsideration and therefore section 12.10.2 is no longer needed. The requirement that drains be inaccordance with the manufacturer's instructions is currently in 12.9.4 and is relocated to the moreappropriate section 12.10.



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12.11.2.5

Vent connectors for medium-heat appliances shall be constructed of factory-built, medium-heat chimneysections or steel of a thickness not less than that specified in Table 12.11.2.5 and shall comply with thefollowing:

(1) A steel vent connector for an appliance with a vent gas temperature in excess of 1000°F (538°C)measured at the entrance to the connector shall be lined with medium-duty fire brick or the equivalent.

(2) The lining shall be at least 21⁄2 in. (64 mm) thick for a vent connector having a diameter or greatestcross-sectional dimension of 18 in. (460 mm) or less.

(3) The lining shall be at least 41⁄2 in. (110 mm) thick laid on the 41⁄2 in. (110 mm) bed for a vent connectorhaving a diameter or greatest cross-sectional dimension greater than 18 in. (460 mm).

(4) Where Factory-built chimney sections , if employed, are installed they shall be joined together inaccordance with the chimney manufacturer’s instructions.

Table 12.11.2.5 Minimum Thickness for Steel Vent Connectors for Medium-Heat Appliances

Vent Connector SizeMinimum Thickness

(in.)

Diameter

(in.)

Area

(in.2)

Up to 14 Up to 154 0.053

Over 14 to 16 154 to 201 0.067

Over 16 to 18 201 to 254 0.093

Over 18 Larger than 254 0.123

For SI units, 1 in. = 25.4 mm, 1 in.2 = 645 mm2.


Editorial revision. Factory built chimney sections are used as vent connectors, they are installed and not employed.




Affiliation: None

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Committee:

Committee Statement


Statement: Editorial revision. Factory built chimney sections are used as vent connectors, they are installed andnot employed.



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12.11.3.2

For Where a single appliance having more than one draft hood outlet or flue collar is installed , themanifold shall be constructed according to the instructions of the appliance manufacturer. Where there areno instructions, the manifold shall be designed and constructed in accordance with approved engineeringpractices. As an alternative method, the effective area of the manifold shall equal the combined area of theflue collars or draft hood outlets, and the vent connectors shall have a minimum 1 ft (0.3 m) rise.


Editorial revision. It is not good grammar to start a sentence with "for".




Affiliation: None

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Committee:

Committee Statement


Statement: Editorial revision to provide clarity.



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12.11.6.1 Connector junctions

Where vent connectors are joined together the connection shall be made with a tee or wye fittingmanufactured for the purpose.


There is an age-old practice of cutting a hole in the side of a single-wall vent connector and inserting another vent connector into the hole. The connector often projects into the interior of the other connector creating an obstruction as well as the joint gap will introduce extra air which may impact overall vent performance. The code does prohibit this, but the path to that prohibition is long and not obvious to the reader.




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Committee Statement


Statement: It has been common practice of cutting a hole in the side of a single-wall vent connector and insertinganother vent connector into the hole. The connector often projects into the interior of the otherconnector creating an obstruction as well as the joint gap will introduce extra air which may impactoverall vent performance.



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12.13.2.2

Where a draft hood of special design is needed or preferable installed , the installation shall be approvedand shall in accordance with the recommendations of the appliance manufacturer or utlize an engineeringmethod .


Installed is substituted for "needed or preferred" as the requirement applies no matter why a specially designed draft hood is used. An engineering method is proposed as an alternate as it engineering methods are allowed elsewhere in the code.




Affiliation: None

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Statement: Section 12.13.2 applies to listed appliances. A use of a draft hood that is not listed with the appliancewill invalidate the listing of that appliance.



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Public Input No. 199-NFPA 54-2018 [ New Section after A.12.13.4 ]

A.12.14 Manually Operated DampersManually Operated Dampers are commonly used to retard the flow of flue gases from an appliance inMechanical Draft Venting Systems. Dampers are used to obtain the desired gas flow during initialoperation and are designed for installation in a vent connector. They are mechanically locked into positionand are fixed baffles.


“A manually operated damper” is the most common method used to retard the flow of flue gases from an appliance in section 12.4.3 Mechanical Draft Systems. However, the installation of a damper in a vent is not allowed by section 12.14. This contradiction within the code leads to confusion in the construction industry.

The manually operated dampers used are designed for use in applications such as an appliance vent connector. A damper designed for use in a vent connector can be permanently fixed into position using tools. Once fixed in position, the damper functions as a fixed baffle. A conscious effort and tools are required to loosen the locking device before baffle can be moved.




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Statement: The code does not currently acknowledge the common use of baffles which are commonly utilized inmechanical draft systems. These baffles are manually adjusted at the time of installation and thenmechanically fixed into position after determination of the proper position of each baffle for a multipleappliance system. The code specifically addresses “Manually Operated Dampers” in the prohibitioncited in Section 12.14. “Fixed baffles” are also addressed as allowable in that section. The problemarises in that it has been interpreted that a baffle used as a balancing baffle should be viewed as“manually adjustable” and hence is prohibited.



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12.15 Automatically Operated Vent Dampers.

An automatically operated vent damper shall be of a be listed type .


The phrase "of a listed type" is not defined nor clear. It is clear what a listed automatically operated vent damper is.




Affiliation: None

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Statement: The phrase "of a listed type" is not defined nor clear. It is clear what a listed automatically operatedvent damper is.


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For13.1.6 Two-Stage/Modulating Appliances. The minimum vent capacity (FAN Min) of vents servingappliances with more than one input rate

, the minimum vent capacity (FAN Min)shall be determined from the

Chapter Chapter 13 tables and shall be less than the lowest appliance input rating

, and the. The maximum vent capacity (FAN Max/NAT Max) shall be determined from the Chapter 13 tables andshall be greater than the highest appliance rating input.


Editorial revision for clarity and improved grammar. A requirement should not begin with "for". The 2 related requirements are separated into 2 sentences.







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Resolution: The proposed changes do not provide any additional clarity.



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13.1.17 Sizing Vents Not Covered by Tables.

For Where a vent heights height is lower than 6 ft (1.8 m) and higher than shown in the Chapter 13tables, an engineering methods method shall be used to calculate the vent capacities capacity .


Editorial revision. A requirement should not begin with "for".




Affiliation: None

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Statement: Editorial revision to improve clarity. "and" was changed to "or" because the tables start with a heightof 6 feet, and these two conditions cannot exist at the same time.



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Public Input No. 65-NFPA 54-2018 [ Sections 13.2.13, 13.2.14 ]

Sections 13.2.13, 13.2.14

13.2.13 Vent Height.

For Where multiple appliances are all located on one floor, the available total height (H) shall bemeasured from the highest draft hood outlet or flue collar up to the level of the outlet of the common vent.

13.2.14 Multistory Vent Height.

For multistory installations, Where multiple appliance are located on more than one floor, the availabletotal height (H) for each segment of the system shall be the vertical distance between the highest drafthood outlet or flue collar entering that segment and the centerline of the next higher interconnection tee.


Editorial revision for clarity. A requirement should not begin with "for".




Affiliation: None

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Resolution: The proposed change is more than editorial and would apply where there are more than oneappliance on each floor.



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For appliances with more than one input rate, the minimum vent connector capacity (FAN Min) ofappliances with more than one input rate shall be determined from the Chapter 13 tables shall be lessthan the lowest appliance input rating, and . the maximum vent connector capacity (FAN Max or NAT Max)shall be determined from the Chapter 13 tables and shall be greater than the highest appliance inputrating.


Editorial revisions for clarity. A requirement should not start with "for". "Chapter 13 tables" is substituted for "tables" to be consistent with 13.1.6 which covers the same subject for vents serving single appliances.







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Statement: Editorial revisions for clarity.


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Public Input No. 196-NFPA 54-2018 [ New Section after A.3.3.5.11.1 ]

A.3.3.51

For installations using biogas, ANSI/CSA B149.6, Code for Digester Gas, Landfill Gas, and BiogasGeneration and U tilization , is a recommended resource that contains safety practices that should beaddressed due to the inherent hazards, which may not be specifically addressed in NFPA 54/ANSI Z223.1,that are specific to the use of biogas, such as oxygen, moisture, and hydrogen sulfide in the gas, ; the useof such gases for a pilot; the purging of a gas train containing biogas; and types of piping materials.


The proposal clarifies that NFPA 54/ANSI Z223.1 covers bio-fuel gases coming from a landfill, a wastewater digester, and an agricultural digester. This is needed since NFPA 86, Standard for Ovens and Furnaces, and NFPA 37, Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, cover biogases and each standard refers to NFPA 54/ANSI Z223.1.






Public Input #134 proposes to include biogas in Clause 3.3.51, Gases.




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Resolution: The PI to introduce biogas was not accepted, therefore annex material is not necessary.



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Public Input No. 132-NFPA 54-2018 [ New Section after A.3.3.64.1 ]

A.3.3.81 The qualified agency should ensure that all work is done in a skillful, thorough manner. Carefulattention should be paid not only to the mechanical execution of the work but also to the arrangement of theinstallation. The qualified agency should provide or arrange for training of installers.


Annex text is added to provide information to qualified agencies and enforcers on training. Currently the Code defines a Qualified Agency as an individual or company that installs piping and appliances that is experienced and familiar with all precautions required. Training is not covered in the definition, or in paragraph 4.1. In order to be qualified, the individual or company must be trained. A separate proposal recommends a new paragraph 4.2 to require training and documentation of training. This new annex text provides this guidance on the definition of a Qualified Agency





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Resolution: The proposed revision is vague and does not provide sufficient guidance.



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Public Input No. 201-NFPA 54-2018 [ Section No. A.7.12.5 ]

A.7.12.5

Section 4.14 of NFPA 780 requires that all grounding media, including underground metallic pipingsystems, be interconnected to provide a common ground potential. These underground piping systems arenot permitted to be substituted for grounding electrodes but must be bonded NFPA 780 establishesground-level potential equalization by requiring all grounding media t hat can assist in providing a path forlightning currents be interconnected to the lightning protection grounding system. Where galvaniccorrosion is of concern, the bond may be made via a spark gap or gas discharge tube. system. Potentialequalization must also be considered at other points throughout the structure to minimize dangerousovervoltages. Given that CSST has a significantly greater impedance than most other conductors in astructure, the more parallel paths to provide current division, the lower the voltage that will appear acrossthe CSST. An additional method to limit the impulse voltage that will appear on the CSST is to limit thelength of runs of CSST between points of potential equalization,


NFPA 54, 7.12.5 indicates that when a lightning protection system is installed, the bonding of gas piping shall be in accordance with NFPA 780. However, NFPA 780 does not specifically address the sensitivities of CSST to a lightning threat as this has been determined to be the responsibility of NFPA 54. The proposed revision introduces some considerations not currently addressed in NFPA 54.


Submitter Full Name: Mitchell Guthrie

Organization: Engineering Consultant

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Resolution: The proposed annex material does not provide any new information consistent with 7.12.5.



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Public Input No. 116-NFPA 54-2018 [ Section No. A.12.9 ]

A.12.9

See Figure A.12.9 .

Figure A.12.9 Exit Terminals of Mechanical Draft and Direct Vent Venting Systems.


A new table and figure 12.9.1 is added to the body of the code. These revised requirements would coordinate with the figure and clearances contained in the ANSI product standards. In addition, the clearances to vent terminals is expanded to cover commonly encountered installation situations such as inside corners, locations under decks and balconies, regulator vents, soffits, etc. Annex A material for section 12.9 is no longer needed.



Public Input No. 115-NFPA 54-2018 [Sections12.9.1, 12.9.2, 12.9.3, 12.9.4]

Replace figure placed in the body ofthe code.

Public Input No. 115-NFPA 54-2018 [Sections 12.9.1, 12.9.2,12.9.3, 12.9.4]




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Statement: A new table and figure 12.9.1 has been added to the body of the code. Annex A material for section12.9 is no longer needed.



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Public Input No. 110-NFPA 54-2018 [ Section No. G.4.4 ]

G.4.4 Flooded Appliances.

Inspect the appliance for signs that the appliance may have been damaged by flooding. Signs of floodinginclude a visible water submerge line on the appliance housing, excessive surface or component rust,deposited debris on internal components, and mildew-like odor. Inform the owner that any part of theappliance control system and any appliance gas control that has been under water must be replaced. Allflood-damaged plumbing, heating, cooling, and electrical appliances should be replaced.


AHRI recommends replacement of appliances, regardless of the damage state or assessment. Under current (4), a servicing technician is going to have to decide, which may not correspond to what AHRI and the manufacturers they represent recommend.




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Statement: AHRI recommends replacement of appliances, regardless of the damage state or assessment. Undercurrent (4), a servicing technician is going to have to decide, which may not correspond to what AHRIand the manufacturers they represent recommend.



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Public Input No. 2-NFPA 54-2018 [ Section No. G.5.2 ]

G.5.2 Test for Combustion Air and Vent Drafting for Natural Draft and Category I Appliances.

Combustion air and vent draft procedures are for natural draft and category I appliances equipped with adraft hood and connected to a natural draft venting system.

(1) Preparing for Inspection. Close all exterior building doors and windows and all interior doors betweenthe space in which the appliance is located and other spaces of the building that can be closed. Turnon any clothes dryer. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so theywill operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers andany fireplace doors.

(2) Placing the Appliance in Operation. Place the appliance being inspected in operation. Adjust thethermostat or control so the appliance will operate continuously.

(3) Spillage Test. Verify that all appliances located within the same room are in their standby mode andready for operation. Follow lighting instructions for each appliance as necessary. Test for spillage at thedraft hood relief opening as follows:

(4) After 5 minutes of main burner operation, check for spillage using smoke.

Remove text below here down to 2. Some utilities and private entities use this section. If atechnician does 6 stops in a day and adding 20 minutes, that is 2 hours of time that could be spentproductively. Unless there is some hard data supporting this, I see no reason to do this.

(1) Immediately after the first check, turn on all other fuel gas burning appliances within the same room sothey will operate at their full inputs and repeat the spillage test.

(2) Shut down all appliances to their standby mode and wait for 15 minutes.

(3) Repeat the spillage test steps (a) through (c) on each appliance being inspected.

(1) Additional Spillage Tests: Determine if the appliance venting is impacted by other door and air handlersettings by performing the following tests.

(2) Set initial test condition in accordance with G.5.2(1) .

(3) Place the appliance(s) being inspected in operation. Adjust the thermostat or control so theappliance(s) will operate continuously.

(4) Open the door between the space in which the appliance(s) is located and the rest of the building.After 5 minutes of main burner operation, check for spillage at each appliance using smoke.

(5) Turn on any other central heating or cooling air handler fan that is located outside of the areawhere the appliances are being inspected. After 5 minutes of main burner operation, check forspillage at each appliance using smoke. The test should be conducted with the door between thespace in which the appliance(s) is located and the rest of the building in the open and in theclosed position.

(6) Return doors, windows, exhaust fans, fireplace dampers, and any other fuel gas burning appliance totheir previous conditions of use.

(7) If, after completing the spillage test it is believed sufficient combustion air is not available, the ownershould be notified that an alternative combustion air source is needed in accordance with Section 9.3of the National Fuel Gas Code. Where it is believed that the venting system does not provideadequate natural draft, the owner should be notified that alternative vent sizing, design or configurationis needed in accordance with Chapter 11 and 12 of NFPA 54. If spillage occurs, the owner should benotified as to its cause, be instructed as to which position of the door (open or closed) would lessen itsimpact, and to arrange for corrective action by an HVAC professional.


Doing the additional step to check draft is not needed. This adds 20 minutes to a test that should only take about 10 minutes. If a tech does 6 stops in a day, this adds 20 minutes for each stop. 6 stops would be 2 hours. This



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time could be spent at another job.


Submitter Full Name: Ervin McKinney

Organization:

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Submittal Date: Thu Jan 18 13:08:36 EST 2018

Committee:

Committee Statement

Resolution: It is not clear which steps are being proposed to be deleted. Saving time is not a technical reason toremove steps and it is not known if this would have an unintended effect on safety. This isnonmandatory text (annex), so it is not a requirement. The draft check is an important step thatshould not be eliminated.



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Public Input No. 161-NFPA 54-2018 [ Section No. K.2.5 ]

K.2.5 UL Publications.



ANSI/UL 441, Gas Vents, 2016.


ANSI/UL 1738, Venting Systems for Gas Burning Appliances, Categories II, III and IV, 2010, reapproved revised 2014.



The terms are redundant and unnecessary. This change results in the proper short form name of the referenced documents. .




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Statement: Updating references to their most recent editions.



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