Green Filter program

Less WasteEnergy SavingsLabor savings in cleaningHAI reduction

Program Outline Discussion on ASHRAE

standard 52.2. Understanding of the filter testing and MERV rating system.

Discussion of air filtration product types. Identify products that provide the greatest value for the consumer.

Discussion energy savings gained from air filtration

Air Filtration testing

ASHRAE 52.1 – 1992 (old standard)

ASHRAE 52.2 – 1999 (new standard)

Dioctylphthalate (DOP) and Poly-alpha olafins (PAO)

UL 900

ASHRAE 52.1

A design qualification test A destructive test to measure

average efficiency, pressure drop, and dust holding capacity for low and medium efficiency filters

Test aerosol is ASHRAE standard test dust:

Size classified Arizona Road Dust

Cotton linters Carbon black

Initial ResistanceRequired to move air

through a filter at a given linier flow

Written in inches water, pascals or millimeters water

Dust holding capacity Amount of dust filter holds

at end of test Written in grams

ASHRAE 52-1

Arrestance – Using ASHRAE Test Dust Percent of dust by weight that filters captures If filter holds 60 grams out of 100 fed then the

arrestance is 60%

Efficiency – Using Outdoor Air Percent of staining filter prevents Filter 90% efficient captures 90% of the staining

dust from reaching the room

(MERV) % % %

1 Aavg < 65 < 20 G1

2 Aavg > 65 < 20

3 Aavg > 70 < 20

4 Aavg > 75 < 20

5 n/a n/a E3 > 20 80 20

6 n/a n/a E3 > 35 85 20-25

7 n/a n/a E3 > 50 90 25-30

8 n/a n/a E3 > 70 92 30-35

9 n/a n/a E3 > 85 95 40-45

10 n/a E2 > 50 E3 > 85 96 50-55

11 n/a E2 > 65 E3 > 85 97 60-65

AverageDust Spot Efficiency

Note: The final MERV value is the highest MERV where the filter data meets all requirements of that MERV.

Average Eff

a t 0.4m

F5

G4

G3

G2

ASHRAE Standard 52.2-2007Composite Average Particle Size

Efficiency, % in Size Range , m

Minimum Eff

Reporting Value

ASHRAE 52.1

AverageArrestance

EN 779Efficiency

Standards Comparison

12 n/a E2 > 80 E3 > 90 98 70-75 F613 n/a E2 > 90 E3 > 90 98 80-85 F714 E1 > 75 E2 > 90 E3 > 90 99 90-95 F815 E1 > 85 E2 > 90 E3 > 90 99 95 F916 E1 > 95 E2 > 95 E3 > 95 100 99 H10

Range 1 Range 2 Range 3

0.30 - 1.0

n/a

1.0 - 3.0

n/a

3.0 - 10.0

E3 < 20

n/a n/a E3 < 20n/a n/a E3 < 20n/a n/a E3 < 20

ASHRAE 52-1 is no longer used

ASHRAE 52-2 is the new air filtration standard

Addendum B Published (Sept 2008) Non-Mandatory Appendix – Appendix

J has been added SPECIFIABLE value –

MERV-A The filter should be

tested per ASHRAE 52.2 (including Appendix J)

The resulting MERV-A must have the same (or higher) numerical value when compared to the MERV value.

Dust Holding Capacity was added Dust Weight Arrestance was added

ASHRAE 52.2

ASHRAE 52.2

ASHRAE 52.2 Standard A design qualification test

A destructive test to measure minimum efficiency (MERV)

Efficiency test aerosol is Potassium Chloride (KCl) particles, 0.1 to 10 micron

Dust loading aerosol is ASHRAE Standard Test Dust

Initial Resistance - Pressure required to move air through filter at a certain air flow written in inches water, pascals or millimeters water

Final Resistance - Pressure at which the filter would be considered fully loaded

Exhaust

Room Air

Outlet Filters

ASMENozzle Downstream Mixer

Blower Flow Control Valve

Inlet Filters

Aerosol Generator

Upstream Mixer

OPC

Device Section

Backup Filter Holder (UsedWhen Dust loading)

Test Duct Configuration

Minimum Efficiency Reporting Value: MERV 6 @500FPM

Composite Average Efficiency:

SizeRange

(microns)

Fractional Efficiency (%) @ P (“W.G.)Composite Minimums

0.285 0.320 0.464 0.643 0.822 1.000

0.3-0.4 2.7 6.7 17.2 29.4 37.1 37.9 2.70.4-0.55 7.8 15.9 27.7 43.3 53.2 54.6 7.80.55-0.7 11.2 30.2 46.0 60.7 70.5 71.6 11.20.7-1.0 17.6 42.6 59.3 73.7 81.3 81.8 17.61.0-1.3 20.4 51.6 70.3 80.8 83.7 85.2 20.41.3-1.6 23.9 58.2 76.5 84.7 86.1 87.2 23.91.6-2.2 28.3 69.9 84.1 89.1 90.2 91.0 28.32.2-3.0 36.3 83.9 91.9 94.2 94.4 93.2 36.33.0-4.0 39.4 89.4 93.7 95.8 96.4 94.9 39.44.0-5.5 42.8 90.6 95.3 96.5 97.9 95.6 42.85.5-7.0 46.5 92.3 97.1 98.0 98.4 97.9 46.57.0-10.0 50.4 94.8 97.5 98.3 100.0 99.2 50.4

Initial0.3 to 1.0 Micron

1.0 to 3.0 Micron 3.0 to 10.0

Micron

E1 = 9.8 E2 = 27.2 E3 = 44.8

TYPICAL 52.2 COMPLETE LOADING TEST DATA

ASHRAE 52.2

Minimum Efficiency Reported Value (MERV) Efficiency by particle size reported as one number – 1 to 16

52.1 Equivalent100

908070605040302010

0

0.30

0.35

0.47

0.62

0.84

1.14

1.44

1.88

2.57

3.46

4.69 6.

28.

37 10

Effic

ienc

y, %

95%

85%

65%

25%

Not to exact scale, representation only

ASHRAE 52.2 “Appendix J”

Incorporates a conditioning step using KCL. Eliminates static charges on media that typically

dissipates quickly in service. Results in a MERV-A rating

HEPA Filter Tests A non-destructive penetration test Aerosolized dioctylphthalate (DOP) - or

polyalphaolephins (PAO) Instrument measures overall intensity of light

scattered by aerosol both upstream and downstream

Polystyrene latex spheres (PSL) – fractional efficiency measured with particle counter

Cost of Energy

World events have impact on the global cost of oil

Energy cost drive economic decisions for most everyone

Life Cycle-costs Investment – capital cost of

filters, frames, installation

PCenergy – present total cost of power

PCmaintenance – present total cost of maintenance including filter replacement, etc.

PCcleaning – present cost of duct cleaning

PCdisposal – present total cost for removal and disposal of the used filters

22%

44%11%

23%

Energy Utilization in a Standard Building

CoolingVentilationLightsPlugs

Energy Savings SFC filter cost per square foot of

media is less than a MERV 13 filter. ASHRAE requires MERV 14 filters in hospitals

Labor cost slightly higher Disposal cost slightly lower Energy costs savings reduced Cleaning savings significant HAI reduction significant

15%5%2%

8%70%

Standard Building Cost Air Filtration

Filter CostLabor CostDisposal CostCleaning Cost

As a rule of thumb- “A reduction of .1” WG. saves $25-$40 per opening per year in energy.” Standard MERV 14 filters have .5 to .7 initial static pressure. Sanders Filter starts at .2.

Green Filter program

• Less Waste• Energy Savings• Labor savings

in cleaning• HAI reduction