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04Round duct diffusersSlot diffusers

176

Slot diffusers, Round duct diffusers

Slot diffusers are designed for air supply in rooms with floor to ceiling heights of 2.5 to 4 m. They are suitable for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems.

Round duct diffusers can be installed at various locations within the duct network. They are suitable for supplying either cold or warm air.


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Overview

178


Slot diffusers

LD-13 LD-14

LD-15

Round duct diffusers

Floor slot diffusers

Panel design slot diffusers

LDP-14

SKD-13D

LD-18

Nozzle diffusers

LD-19 LD-20

LD-16N

■ Slot diffusers

Slot diffusers are designed for air supply in rooms with floor to ceiling heights of 2.5 to 4 m. They are suitable for supplying either cold or warm air, in particular in applications where air conditioning com-fort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems.

■ Nozzle diffusers

Nozzle diffusers LD-19 are designed for supply of warm or cold air and can be mounted in the wall or in the ceiling. Adju-stable deflectors allow us to set different directions of air discharge.Nozzle diffusers LD-20 are designed to supply low quantities of air on big window surfaces to prevent condensation (ceiling installation near windows) or for big throws for cooling when wall installation (Coanda effect).

■ Panel design slot diffusers

A panel design slot diffuser consists of a face plate and a plenum box. Cylindrical air deflectors, equal to those in LD-13 and LD-14 diffusers, are installed in the slots, to allow continuous adjustment of dischar-ged air direction within the 360° range. On order, diverse plate designs and slot patterns are available.

■ Floor slot diffusers

LD-16N floor slot diffusers are a suitable solution for swimming pools and similar rooms with large glass surfaces and windows. They are designed for installati-on in the floor. Warm air is supplied in the upwards direction, towards the window.

■ Round duct diffusers

Round duct diffusers can be installed at various locations within the duct network. They are suitable for supplying either cold or warm air.

■ Software: KLIMA ADE

LD and SKD Software:• available calculation and graphical

display of air supply for slot diffusers LD-13, LD-14 and LD-15

• available calculation of technical speci-fications for the application of wall- or ceiling-mounted slot diffusers

• available calculation of ceiling-moun-ted multiple-diffuser configuration air supply

• application of vertical or horizontal slot diffuser air supply into the room, depending on the mode of operation – heating or cooling

• the package supports basic air supply mode models for the SKD-13 round duct diffuser

• available calculation of SKD-13 round duct diffusers cooling mode: single-si-de and two-side horizontal supply and alternating horizontal supply heating mode: vertical air supply

Software: Klima ADE

Page

SLot DIFFuSERS 180

Slot diffusers LD-13, LD-14 180

Slot diffusers LD-15 195

Slot diffusers LD-17, LD-18 199

Nozzle diffusers LD-19 213

Nozzle diffusers LD-20 219

Floor slot diffusers LD-16N 230

Panel design slot diffusers LDP-13, LDP-14 232

RouND Duct DIFFuSERS 234

Round duct diffusers SKD-13 234

Content

■ Legend of symbols

INOXElement is intended to be built in the floor.

Element is suitable for the supply of warm air (heating).

The element is made of stainless sheet steel AISI 304.

AI Element is made of aluminium profiles, aluminium sheet or aluminium casting.

Element is intended to be built in the wall.

Element is suitable for the supply of cool air (cooling).

St MElement is made of steel sheet. Element is intended to be built in the ceiling or in the wall.

Element allows regulation by electric motor (Belimo electric motors).

RAL9010

FEU...

Element is powder painted in stan-dard RAL 9010 colour. Other desired colour is to be specified in the order.

Element for air conditioning of rooms with floor to ceiling heights room up to 4 m.

Element is intended for air filtration. The filter of class … is built in.

CDShady symbol means possibility of optional material, surface protection, motor version, …

Element for air conditioning of rooms with floor to ceiling heights from 6 to 15 m.

The possibility of the automatic selec-tion and calculation of the technical characteristics of grilles and difusers in regard to the given conditions with the assistance of the Klima ADE program.

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AI

RAL9010

CD

12

3

f D

Ha

B 60

H1

A

9.4

F

8.5

41

15

E

4

5

6

7

LD-1353

8.5

9.4

F

4

5

6

E

26A

7

LD-14

8

A

9.4

F

8.5

41

15

E

4

5

6

7

LD-13

53

8.5

9.4

F

4

5

6

E

26A

7

LD-14

■ Slot diffusers LD-13, LD-14

ApplicationLD-13 and LD-14 slot diffusers are designed for the supply of air in rooms with floor to ceiling heights of 2.5 to 4 m for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems.

DescriptionLD-13 and LD-14 slot diffusers are designed in 1, 2, 3 and 4-slot versions. Diffuser face plate consists of anodised aluminium sections with built-in cylindrical deflectors made of plastics. Deflectors allow continuos adjustment of discharged air direction within the 360° range as well as control of supply air flow rate. The cylindrical deflectors also allow full shutting of the diffuser. The slot diffuser plenum box is made of galvanised sheet steel and has a flow rate control damper built in its inlet spigot, to allow fine adjust-ment of the desired air flow rate.

control schematic of the spigot volume control damper

Slot diffusers

1 Plenum box2 Inlet spigot3 Volume control damper4 Main section5 Cylindrical deflector6 Side lateral section7 Connecting section8 Outside insulation

180

Slot diffusers, Round duct diffusersSlot diffusers

LD-14 O/ 1

LD-14 O/ 2

LD-14 O/ 4

LD-14 O/ 3

LD-13 O/ 1

LD-13 O/ 2

LD-13 O/ 3

LD-13 O/ 4

50

96.5

142

187.553

.553

.553

.553

.5142

107

72.5

37.5

41.5

41.5

41.5

41.5

LD-13/ 1

LD-14/ 1

LD-13/ 2 LD-13/ 3 LD-13/ 4

LD-14/ 2 LD-14/ 3 LD-14/ 4

LD-13

No. of slots H H1 B A E F

1 220 261 95 33 57.5 24.4

2 230 271 129 67 92 58.2

3 250 291 162 101 126.5 92.0

4 290 331 196 135 161.5 125.8

LD-13

No. of slots H H1 B A E F

1 233.5 287 106 44 69 35.3

2 253.5 307 150 89 115 80

3 293.5 347 195 133 161.5 124.7

4 318.5 372 240 178 206.5 169.4

Slot diffuser types

• Single-slot (designation LD-13,14/1) • Two slots (designation LD-13,14/2)• Three-slots (designation LD-13,14/3)• Four-slots (designation LD-13,14/4)

Slot diffusers LD-13 o, LD-14 o

Narrow versionThe narrow slot diffuser differs from the conventional slot diffuser construction as regards its mounting to the ceiling or wall. The conventional slot diffuser has a L-cross-section mounting sleeve which remains visible and may, in certain appli-cations, interfere with aesthetic require-ments. The narrow design has eliminated this deficiency as well as introduced improved structural rigidity due to its reinforced sleeve. The product is thus sui-table for installation in cooling suspended ceilings as well.

LD-13, LD-14LD-13 O, LD-14 O

Standard lenghts L

LD-13 and LD-14 slot diffusers are avai-lable in standard lengths ranging from L=300 to L=2000 mm, with a 100 mm step. In cases where longer diffusers are required, they can be joint together by means of (rail-type) connecting plates. Plenum boxes are also available in standard lengths ranging from 300 mm to 2000 mm.

Special orders

On customer’s request slot diffusers can be made in other dimensions. End seals and longitudinal sections are painted in any RAL scale colour according to the customer’s request. As standard, cylindri-cal deflectors are black or white, on the customer’s request, they can be coloured in any RAL scale colour. Non-standard colours and extra components are to be ordered separately.

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300

300

angle 90˚

L/2L/2

J J

Joining diffusers together in length and width

Joining in width (into diffusers with multiple slots) requires special strip sections, while joining in length requires connecting plates (the total length of combined diffusers is not limited).

Cylindrical deflectors

Cylindrical deflectors are an important components of a slot diffuser. They allow adjustment of both air flow rate and direction. Cylindrical deflectors are made of plastics. As standard, they are black or white.

Slot diffuser face plate designs

Slot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles. Angular ended sections are not fitted with air direction controls.

End seals

End seals are components of the diffuser face plate. They are available in two designs:• as an angle piece (E – on both ends,

Et – on one end only) or • plates (F – on both ends, Ft – on one

end only).The connecting strip-section has no end angle pieces or plates seals (designation T).

Number of inlet spigots

Standard length

Position of spigots

1 300 – 1000 L/2

2 1100 – 1500 J = 300

2 1600 – 2000 J = 400

Number and diameter of inlet spigots

L 300 do 1000 1100 do 1500 1600 do 2000

No. of slotsNumber and diameter of inlet spigots

LD-13 LD-14 LD-13 LD-14 LD-13 LD-14

1 1 x 98 1 x 123 2 x 98 2 x 123 2 x 123 2 x 138

2 1 x 138 1 x 158 2 x 123 2 x 138 2 x 138 2 x 158

3 1 x 158 1 x 198 2 x 138 2 x 158 2 x 158 2 x 198

4 1 x 198 1 x 223 2 x 158 2 x 198 2 x 198 2 x 223

Position of inlet spigots

182


Installation with a threaded bar (R)

Installation with wire (R) Installation with suspension bracket (P)

Fixing with self-tapping screws (U)

Fixing with spring clamps (S) Fixing with a cross-member (Z)

Installation with special fastening elements (R)

Installation with springs into ducts (N)

Fixing of the plenum box onto LD-13, LD-14 diffusers

• With self-tapping screws (designation u)• With spring clamps (designation S)• With a cross-member (designation Z)

Installation methods

• With a threaded bar (designation R)• With a wire (designation R)• With suspension brackets on the

plenum box (designation P)• With special fixing elements

(designation R)• With springs (designation N)

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c d

gfe

a b

101˚

LD-13

LD-14Standard

(left) Standard(vertical)

Air jet angle 60°(left, right)

Air jet angle 60°(right)

Air jet angle 60°(left)

Standard(left, right)

Standard (right)Discharge direction

Discharge angle

Min

. air

flow

rate

Max

. air

flow

rate

Discharge direction

Discharge angle

Min

. air

flow

rate

Max

. air

flow

rate

Pogled z vrha

1

2

3

Top view

Slot diffuser with actuator controlled discharge directionSlot diffusers with actuator controlled discharge direction are suitable for summer-winter air supply applications. The desired direction of air jet is achieved by means of an electric actuator which moves a slider. Manual adjustment is therefore not necessary. Compared with standard slot diffusers, air flow rate is reduced by 50 %. There are two options for the Belimo electric motors:LH 24A-SR100 and LH-24A-MP100. The first operates at 24V AC/DC, the second within the range of 0-10V or 0-32V. Their travel distance is 100 mm, for which 150 s is required.

component Parts1. Slot diffuser2. Deflector3. Electric actuatorIn case the discharge angle is to be adjustable by means of an electric actuator (winter-summer application), this requirement shall be specified in the ordering form.* Motor version on customer’s request.

types of air discharge

Every second row1 Adjustment of deflectors for

warm air supply

Every second row2 Adjustment of deflectors for

cold air supply

184


ordering key

Length L=300, 400, 500, …, 2000 (single piece)

Type of air discharge (a, b, c, d, e, f, g)

I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the

plenum box (synthetic rubber based material)

I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material)

N Installation with spring clamps – without plenum box (LD-13 and LD-14 only)P Installation of the plenum box with hangersR Installation with brackets built in the basic section

Z Fixing of the diffuser to the plenum box with a cross-memberS Fixing of the diffuser to the plenum box with spring clampsU Fixing of the diffuser to the plenum box with self-tapping screws

M Volume control damper

K Plenum box

E End sealing on both endsET End sealing on one end

F End plate on both endsFT End plate on one end

T Rail-type without end sealings and plates

B Black deflectorsW White deflectors

1 Number of slots234

LD-13 Slot diffuserLD-14

LD-13 O Narrow slot diffuserLD-14 O

LD-13/1/B/E/K/M/S/P/I/g L=1700

Note:• Please specify the deflector colour in your order. • Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order.• For the LD-13 0 and LD-14 0 type, the following end seals are available: F, FT and T.• When installing in cooling ceilings, consult the manufacturer.• In the case the slot diffuser is ordered complete with plenum box, the air jet configuration is set as shown on the drawing on page 184.• Versions with insulation on the inside of the plenum box are also available.

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1’

32

1

4

B1

B

L

H

H2

M1

B2

Wall mounted slot diffusers LD-13S and LD-14S

ApplicationDesigned for installation in plasterboard walls with a thickness of 100 mm or more. These are used for the supply of air in rooms with ceiling heights of 2.5 to 4m. Suitable for cooling as well as for heating, especially in rooms with elevated comfort requi-rements. They may also be used to discharge the air from the room, and enable a high level of induction.

DescriptionInlet or outlet connection may be in the plenum box above the ventilated room or on the other side of the wall. On the diffuser side, the plenum box is sound-insulated, lowering the level of noise emissions in the ventilated room.

component parts1. front chamber connection (KF)1’. rear chamber connection (KB)2. slot diffuser LD-13S or LD-14S3. sound insulation4. plenum box

Plenum boxDespite its low height, it assures sufficient air distribution in the direction from the plenum box connection to LD-13 or D-14 across the entire length of the diffuser. It can be installed in plasterboard walls with a minimum thickness of 100 mm. Design allows installation and placement on metal profile brackets of internal plasterboard walls.

Front plenum box connectionFront plenum box connection allows air inlet and outlet above the suspended ceiling of the ventilated room. This assures a certain competitive advantage, as there is no need to adjust the duct network to the diffuser placement.

Rear plenum box connectionRear side connection allows air inlet and outlet through the neighboring room. Due to the height of the connector according to LD-13 o LD-14, the duct network can be placed above the suspended ceiling.

Sound insulationSound insulation has enhanced absorption properties and prevents the spreading of emissions from the duct network into the ventilated room. The insulation placement effectively reduces internal noise generation in the entire plenum box, particularly on the location of the inlet jet through the connection.

H (mm)

H1 (mm)

H2 (mm)

B (mm)

B1 (mm)

B2 (mm)

L (mm)

ΦD (mm)

LD-13S/1 289 203 40 75 58 45 1000 98

LD-14S/1 289 203 74 75 58 45 1000 123

LD-13S/2 289 203 51 75 58 45 1000 138

LD-14S/2 289 203 96 75 58 45 1000 158

Installation in the plasterboard

Dimensions

186


ordering key

Note:• Please specify the deflector colour in your order.• Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order.• Versions with insulation on the inside of the plenum box are also available.

LD-13S/1/B/E/K/I5 L =1000

Length

I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of

the plenum box (synthetic rubber based material)I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the


KF Plenum box, front side connectionKB Plenum box, back side connection


F End plate on both endsFT End plate on one end



1 Number of slots2

S For wall installation

LD-13 Slot diffuser typeLD-14

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1

2

3

4

100 300 500 1000 1200

LD-13

Štev

ilo re

ž

Q(m3/hm)

LD-14

Ax

LL

H1

VH1

ΔtH VLΔtL

x xALL

H1

VL

ΔtL

VH1

ΔtH

VL

ΔtL

Nr. o

f slo

ts

Fast selection diagram: LWA < 35 dB(A)

Technical specifications for one-slot diffuser, per meter of lenght, at horizontal discharge

A(m²) Q(m³/h) LWA (dB)

LD-13 0.0092 135 34

LD-14 0.0136 210 28

Definition of symbols

Q (m³/hm) Air flow rate to lengthx (m) Horizontal distance to the wallH (m) Room heightL (m) Throw distance (L=H1+x) VL (m/s) Air velocity at the throw

distance LΔtz (K) Temperature difference betwe-

en the supply and room airΔtL (K) Difference between the core

and room air temperatureΔp (Pa) Pressure dropLWA (dB(A)) Sound power levelvH1 (m/s) Air velocity at the distance H1A, B (m) Distance between diffusers, in

length and in widthH1 (m) Throw distance

188


A (m)

V (

m/s

)H1

0.4

0.3

0.25

0.2

0.15

H1 (m)

1 1.2 1.6 2

LD-13 / 1 160 125 110 90 70 55 45

LD-13 / 4 325 250 215 180

LD-13 / 2 230 180 155 125 100LD-13 / 3 280 220 185 155

2 2.5 3 4 5 7 10

LD-13 / 1 160 125 110 90 70 55 45

LD-13 / 4 325 250 215 180

LD-13 / 2 230 180 155 125 100LD-13 / 3 280 220 185 155

L (m)

0.8

V (

m/s

)L

0.6

0.5

0.4

0.30.25

0.2

0.15

0.12 2.5 3 4 5 7 10

2.5

V (

m/s

)H1

0.3

H1 (m)

1 1.2 1.6 2

LD-13 / 1 160 125 110 90 70 55 45

LD-13 / 4 395 325 250 215 180

LD-13 / 2 230 180 155 125 100LD-13 / 3 340 280 220 185 155

2.5

0.25

0.20.15

0.1

2 3 4 5 7 10A (m)

V (

m/s

)L

LD-13 / 1 160 125 110 90 70 55 45

LD-13 / 4 395 325 250 215 180

LD-13 / 2 230 180 155 125 100LD-13 / 3 340 280 220 185 155

2.5

0.7

0.5

0.4

0.30.250.2

0.15

0.1

0.052 2.5 3 4 5 7 10

L (m)

(m³/hm)

(m³/hm)

Air velocity diagrams for LD-13, at different throw distances

one or two sided horizontal discharge

Alternate sided horizontal discharge

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H1 (m)

1 1.2 1.6 2

LD-14 / 1LD-14 / 2

0. 4

0.3

0.25

0. 2

0.15

2 2.5 3 4 5 7 10

V (

m/s

)H1

V L (m

/s)

2.5

0.8

0.6

0.5

0.4

0.3

0.25

0.2

0.15

0.12 2.5 3 4 5 7 10

H1 (m)

1 1.2 1.6 2

0.30.250.2

0.15

0.1

2.5

LD-14 / 1LD-14 / 2

0.7

0.5

0.4

0.30.25

0.2

0.15

0.1

0.052 2.5 3 4 5 7 10

V (

m/s

)L

2 2.5 3 4 5 7 10

V (

m/s

)H1

A (m)

A (m)

L (m)

L (m)

H1 (m)

1 1.2 1.6 2

LD-14 / 1LD-14 / 2

0. 4

0.3

0.25

0. 2

0.15

2 2.5 3 4 5 7 10

V (

m/s

)H1

V L (m

/s)

2.5

0.8

0.6

0.5

0.4

0.3

0.25

0.2

0.15

0.12 2.5 3 4 5 7 10

H1 (m)

1 1.2 1.6 2

0.30.250.2

0.15

0.1

2.5

LD-14 / 1LD-14 / 2

0.7

0.5

0.4

0.30.25

0.2

0.15

0.1

0.052 2.5 3 4 5 7 10

V (

m/s

)L

2 2.5 3 4 5 7 10

V (

m/s

)H1

A (m)

A (m)

L (m)

L (m)

H1 (m)

1 1.2 1.6 2

LD-14 / 1LD-14 / 2

0. 4

0.3

0.25

0. 2

0.15

2 2.5 3 4 5 7 10

V (

m/s

)H1

V L (m

/s)

2.5

0.8

0.6

0.5

0.4

0.3

0.25

0.2

0.15

0.12 2.5 3 4 5 7 10

H1 (m)

1 1.2 1.6 2

0.30.250.2

0.15

0.1

2.5

LD-14 / 1LD-14 / 2

0.7

0.5

0.4

0.30.25

0.2

0.15

0.1

0.052 2.5 3 4 5 7 10

V (

m/s

)L

2 2.5 3 4 5 7 10

V (

m/s

)H1

A (m)

A (m)

L (m)

L (m)

H1 (m)

1 1.2 1.6 2

LD-14 / 1LD-14 / 2

0. 4

0.3

0.25

0. 2

0.15

2 2.5 3 4 5 7 10

V (

m/s

)H1

V L (m

/s)

2.5

0.8

0.6

0.5

0.4

0.3

0.25

0.2

0.15

0.12 2.5 3 4 5 7 10

H1 (m)

1 1.2 1.6 2

0.30.250.2

0.15

0.1

2.5

LD-14 / 1LD-14 / 2

0.7

0.5

0.4

0.30.25

0.2

0.15

0.1

0.052 2.5 3 4 5 7 10

V (

m/s

)L

2 2.5 3 4 5 7 10

V (

m/s

)H1

A (m)

A (m)

L (m)

L (m)

(m³/hm) (m³/hm)

(m³/hm) (m³/hm)

Air velocity diagrams for LD-14, at different throw distances

one or two sided horizontal discharge

Alternate sided horizontal discharge

190


Q (m3/h)

200

100

50

2015

1086

4

3

21.5

1100 150 200 300 400 500 700 1000

20

25

30

35

40

45

50

55

5001000

15002000

L w A (dB(A) )

p

(Pa)

t

Q (m3/h)

200

100

50

20

1086

43

21.5

1100 150 200 300 400 500 700 1000

60

5001000

1500

2000

L w A (dB(A) )

5550

4540

35

30

25

20

15

10t

p (

Pa)

LD 13/1 LD 13/2

correction factors applicable to LD-13/1

Type of discharge Vertical Horizontal

Flow rate control

damperOpen Closed Open Closed

L=500 x 1 x 1.44 x 0.87 x 1.34

L=1000 x 1 x 3.30 x 0.85 x 3.02

L=1500 x 1 x 5.26 x 0.84 x 4.47

L=2000 x 1 x 7.37 x 0.81 x 5.68



Flow rate control


L=500 x 1 x 1.91 x 0.86 x 1.79

L=1000 x 1 x 5.91 x 0.70 x 5.31

L=1500 x 1 x 9.88 x 0.58 x 8.67

L=2000 x 1 x 14.10 x 0.47 x 11.99

Sound power level and pressure drop

Example

Q = 150 m³/hL = 1000 mmΔpt = 14 Pa (vertical; damper opened)Δpt = 14 x 3.30 = 46.2 Pa (vertical; damper closed)Δpt = 14 x 0.85 = 11.9 Pa (horizontal; damper opened)Δpt = 14 x 3.02 = 42.3 Pa (horizontal; damper closed)

LWA = 32 dB(A)

Example


LWA = 30 dB(A)

191

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

LVES

CIRC

ULAR

DIF

FUSE

RS,

SQUA

RE D

IFFU

SERS

SWIR

L DIFF

USER

S,

VARI

ABLE

SWIR

L DIFF

USER

SSL

OT D

IFFU

SERS

, RO

UND

DUCT

DIF

FUSE

RSAI

R DI

SPLA

CEM

ENT U

NITS

SUPP

LY A

IR N

OZZL

ESEX

TERN

AL E

LEM

ENTS

AIR

FLOW

CO

NTRO

L UNI

TS

SOUN

D AT

TENU

ATOR

S,

SOUN

D AT

TENU

ATIN

G LO

UVRE

S


200

100

50

20

1086

43

21.5

1

500

1000

1500

2000

L w A (dB(A) )

10

Q (m 3/h)100 150 200 300 400 500 700 1000

15

20

25

30

35

4045

5060

70

75

p

(Pa)

t

200

100

50

20

1086

43

21.5

1

500

1000

1500

2000

L w A (dB(A) )

10

15

20

25

30

35

40

45

5055

Q (m 3/h)100 150 200 300 400 500 700 1000

p

(Pa)

t



Flow rate control


L=500 x 1 x 2.37 x 0.84 x 2.24

L=1000 x 1 x 8.52 x 0.56 x7.59

L=1500 x 1 x 14.50 x 0.32 x 12.86

L=2000 x 1 x 20.82 x 0.18 x 18.29



Flow rate control


L=500 x 1 x 3.08 x 0.70 x 2.91

L=1000 x 1 x 11.07 x 0.47 x 9.87

L=1500 x 1 x 18.85 x 0.27 x 16.72

L=2000 x 1 x 27.07 x 0.15 x 23.78


Example


LWA = 29 dB(A)

Example


LWA = 33 dB(A)

LD 13/3 LD 13/4

192


200

100

50

20

10

6

4

2

1.5

1

5001000

1500

2000

p

(Pa)

t

L w A (dB(A) )

15

Q (m 3/h)100 150 200 300 400 500 700 1000

20

25

30

3540

45

50

8

3

200

100

50

20

108

6

43

2

1.5

1

500

1000

1500

2000

p

(Pa)

t

L w A (dB(A

) )

15

Q (m 3/h)100 150 200 300 400 500 700 1000

20

25

30

35

4045

50




Flow rate control


L=500 x 1 x 1.81 x 0.76 x 1.31

L=1000 x 1 x 3.83 x 0.42 x 3.23

L=1500 x 1 x 5.80 x 0.28 x 5.11

L=2000 x 1 x 7.87 x 0.19 x 7.07



Flow rate control


L=500 x 1 x 2.11 x 0.53 x 1.59

L=1000 x 1 x 8.84 x 0.29 x 7.96

L=1500 x 1 x 15.36 x 0.20 x 14.14

L=2000 x 1 x 22.32 x 0.14 x 20.70

LD 14/2LD 14/1

Example


LWA = 38 dB(A)

Example


LWA = 36 dB(A)

193

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

LVES

CIRC

ULAR

DIF

FUSE

RS,

SQUA

RE D

IFFU

SERS

SWIR

L DIFF

USER

S,

VARI

ABLE

SWIR

L DIFF

USER

SSL

OT D

IFFU

SERS

, RO

UND

DUCT

DIF

FUSE

RSAI

R DI

SPLA

CEM

ENT U

NITS

SUPP

LY A

IR N

OZZL

ESEX

TERN

AL E

LEM

ENTS

AIR

FLOW

CO

NTRO

L UNI

TS

SOUN

D AT

TENU

ATOR

S,

SOUN

D AT

TENU

ATIN

G LO

UVRE

S


200

100

50

20

1086

43

2

1.5

1

500

1000

1500

2000

p

(Pa)

t

15

Q (m3/h)100 150 200 300 400 500 700 1000

L w A (dB(A ) )

20

25

30

35

4045

50

200

100

50

20

1086

43

21.5

1

500

1000

1500

2000

p

(Pa)

t

L w A (dB(A) )

15

Q (m 3/h)100 150 200 300 400 500 700 1000

520

25

30

35

40




Flow rate control


L=500 x 1 x 2.41 x 0.33 x 1.87

L=1000 x 1 x 13.86 x 0.19 x 12.69

L=1500 x 1 x 24.92 x 0.16 x 23.17

L=2000 x 1 x 36.76 x 0.13 x 31.33



Flow rate control


L=500 x 1 x 3.14 x 0.28 x 2.43

L=1000 x 1 x 18.02 x 0.15 x 16.50

L=1500 x 1 x 32.34 x 0.13 x 28.12

L=2000 x 1 x 47.79 x 0.10 x 39.63

LD 14/3 LD 14/4

Example


LWA = 38 dB(A)

Example


LWA = 36 dB(A)

194


AI

RAL9010

CD

41

205

15

7.5

147

80

f78

60

4

3

2

1

Installation openings: 15 x L (diffuser length)

Joining slot diffusers together in length

■ Slot diffuser LD-15

ApplicationSlot diffuser LD-15 is designed to supply air in rooms with floor to ceiling heights from 2.5 to 4 m. They are primarily desi-gned for the supply of cold air in applicati-ons with high comfort demands.

DescriptionLD-15 slot diffuser is of a one-slot con-struction. The diffuser face plate consi-sts of aluminium sections with built-in cylindrical deflectors made of recycled plastics. Individually adjustable deflectors allow continuous adjustment of discharge angle within the 360° range, as well as adjustment of air flow rate. The diffuser air flow can be completely shut by means of the cylindrical deflectors. The plenum box is made of galvanised sheet steel.

No. of spigots Standard lengths (L)

1 300, 400, 500, 600, 700, 800, 900, 1000

2 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000

Position of inlet spigotsThe positions of inlet spigots are equal to those of LD-13 and LD-14 slot diffusers. See drawing and table on page 182.

Slot diffuser face plate designsSlot diffuser face plates are made of line-ar or angular ended sections, which allow the diffusers to be joined at different angles. Angular ended sections are not fitted with air direction controls.

Cylindrical air deflectorsCylindrical deflectors are the most impor-tant components of a slot diffuser. They allow free adjustment of the air flow rate.

Joining slot diffusers together in lengthSections can be joint together by means of connecting plates. Total length of so joint sections is not limited.

1 Plenum box2 Inlet spigot3 Main section4 Cylindrical air deflector

195

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

LVES

CIRC

ULAR

DIF

FUSE

RS,

SQUA

RE D

IFFU

SERS

SWIR

L DIFF

USER

S,

VARI

ABLE

SWIR

L DIFF

USER

SSL

OT D

IFFU

SERS

, RO

UND

DUCT

DIF

FUSE

RSAI

R DI

SPLA

CEM

ENT U

NITS

SUPP

LY A

IR N

OZZL

ESEX

TERN

AL E

LEM

ENTS

AIR

FLOW

CO

NTRO

L UNI

TS

SOUN

D AT

TENU

ATOR

S,

SOUN

D AT

TENU

ATIN

G LO

UVRE

S


Fixing of the diffuser to the plenum box with self-tapping screws (U) Fixing of the diffuser to the plenum box

with a spring clamps (S)

ordering key

Installation with suspension brackets on the plenum box (P)

Installations with suspension bracket on the main section (R)

Fixing of the plenum box onto a LD-15 slot diffuser• With self-tapping screws (designation u)• With spring clamps (designation S)

Installation methods• Installation with suspension brackets on

the plenum box (designation P)• Instalaltion with suspension brackets

on the main section (designation R)

Note:• Please specify the deflector colour in your order.• Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours

shall be specified in the order.• When installing in cooling ceilings, consult the manufacturer.• Versions with insulation on the inside of the plenum box are also available.

LD-15/B/K/M/S/P/I L=1500

Length L=300, 400, 500, 600 …, 2000 (single piece)

I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box.

I9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material).

I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material).

P Installation of the diffuser with suspension brackets on the plenum box

R Installation with suspension brackets on the main section

S Fixing of the diffuser to the plenum box with a spring clampU Fixing of the diffuser to the plenum box with self-tapping screwsM Volume control damperK Plenum boxB Black deflectorsW White deflectors

196


0.4

0.3

0.25

0.2

0.15

V (

m/s

)H1

2 2.5 3 4 5 7 10A (m)

H1 (m)1 1.2 1.6 2

LD-15 / 1 160 125 110 90 70 55 45

0.4

0.30.25

0.2

0.15

LD-15 / 1 160 125 110 90 70 55 45

V (

m/s

)L

2 2.5 3 4 5 7 10L (m)

2.5

0.5

0.6

0.8

0.1

0.1

0.25

0.2

0.15

V (

m/s

)H1

2 2.5 3 4 5 7 10A (m)

H1 (m)1 1.2 1.6 2

LD-15 / 1 160 125 110 90 70 55 452.5

2 2.5 3 4 5 7 10L (m)

LD-15 / 1 160 125 110 90 70 55 45

0.7

0.5

0.4

0.30.250.2

0.15V (

m/s

)L

0.1

0.05

(m³/hm) (m³/hm)

(m³/hm) (m³/hm)

L= 500

L=1500

L=1000

L=2000

50 100 150 200

Q (m3/h)

250

LWA<35 dB(A)

LWA35-45 dB(A)

Q (m³/hm)

technical dataFree surface, per 1 m of length: Aef=0.004559 m².Air flow rate per 1 m of length: Q=20-70 m³/hm.

Fast selection diagram

Air velocity diagrams, at different throw distances

one or two sided horizontal discharge:

Alternate sided horizontal discharge:

197

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

LVES

CIRC

ULAR

DIF

FUSE

RS,

SQUA

RE D

IFFU

SERS

SWIR

L DIFF

USER

S,

VARI

ABLE

SWIR

L DIFF

USER

SSL

OT D

IFFU

SERS

, RO

UND

DUCT

DIF

FUSE

RSAI

R DI

SPLA

CEM

ENT U

NITS

SUPP

LY A

IR N

OZZL

ESEX

TERN

AL E

LEM

ENTS

AIR

FLOW

CO

NTRO

L UNI

TS

SOUN

D AT

TENU

ATOR

S,

SOUN

D AT

TENU

ATIN

G LO

UVRE

S


200

100

50

20

10

6

43

21.5

1

500

10001500

p

(Pa

)t

15

10 20

L wa (dB(A))

30 40 50 60 80 100 150 200 250

1000

10

20

25

30

35

40

45

50

55

Q (m3/hm)

αα

α=0˚ α=45˚ α=90˚

Q (m³/h) 100 150 200 100 150 200 100 150 200

L=500 Data in the diagram +5 +7 +10 +15 +32 +35




α = 0˚ Control damper in the inlet spigot is fully opened

α = 45˚ Control damper in the inlet spigot is half opened

α = 90˚ Control damper in the inlet spigot is fully closed


α=0˚ α=45˚ α=90˚

Q (m³/h) 100 150 200 100 150 200 100 150 200





α = 0˚ Control damper in the inlet spigot is fully opened



ΔPt correction (in Pa) in cases of vertical discharge

ΔPt correction (in Pa) in cases of inclined discharge

198


FA

bE

1

82

3

4

5

6 7

43

1825

43

ØD H2 H

H1

60B1. Plenum box2. Inlet spigot3. Volume control damper4. Side section5. Cylindrical deflector6. Intermediate section7. Connecting bar8. Insulation (entire outside surface of

the plenum box)

ApplicationSlot diffusers LD-17 and LD-18 are designed for supply of cold or warm air in rooms with a height between 2.5 m and 4 m. They allow easy setting of air deflectors for different modes of operation and can be mounted to ceiling or wall.

DescriptionLD-17 and LD-18 slot diffusers are desi-gned in 1, 2, 3 and 4-slot versions. The unit’s front consists of anodised alumini-um profiles (on customer’s request, these can be powder painted in RAL 9010 or another colour). The individually adjusta-ble air deflectors are made of plastic in white (RAL 9010) or black (RAL 9005) colour). Plenum box is made of galvani-sed sheet steel. Slot diffusers LD-17 and LD-18 are made in standard lengths: from 200 up to 2000 mm with a 100 mm step (any length available upon request).Nominal air volume per 1 m of slot:LD-17 – 150 m³/h LD-18 – 200 m³/h (Δpt = 30 Pa, NR = 35 dB)

LD-17 b=15

No. of slots A F E B H H1 H2

1 45.5 34.5 65 107 220 263 203.5

2 78.5 67.5 98 139 230 273 213.5

3 111.5 100.5 131 172 250 293 233.5

4 144.5 133.5 164 205 290 333 273.5

LD-18 b=26.5

No. of slots A F E B H H1 H2

1 57.0 46.0 76.5 118 233 276 216.5

2 101.0 90.5 121.0 162 253 296 236.5

3 146.0 135.0 165.5 207 293 336 276.5

4 190.5 179.5 210.0 251 318 361 301.5

■ Slot diffusers LD-17, LD-18

199

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

LVES

CIRC

ULAR

DIF

FUSE

RS,

SQUA

RE D

IFFU

SERS

SWIR

L DIFF

USER

S,

VARI

ABLE

SWIR

L DIFF

USER

SSL

OT D

IFFU

SERS

, RO

UND

DUCT

DIF

FUSE

RSAI

R DI

SPLA

CEM

ENT U

NITS

SUPP

LY A

IR N

OZZL

ESEX

TERN

AL E

LEM

ENTS

AIR

FLOW

CO

NTRO

L UNI

TS

SOUN

D AT

TENU

ATOR

S,

SOUN

D AT

TENU

ATIN

G LO

UVRE

S


φD

B 60

H2

43 H

1 H

J JL/2 L/2

30

0

300

90°


Number of spigots Standard length Position of inlet

spigots

1 300-1000 L/2

2 1100-1500 J=300

2 1600-2000 J=400

Slot diffuser face plate designsSlot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles.

Number and diameter of inlet spigots

Joining diffusers together in lengthJoining in length requires connecting pla-tes (the total length of combined diffusers is not limited).

End sealsEnd seals are components of the diffuser face plate. They are available in two designs:• as an angle piece (E – on both ends,

Et – on one end only) or • plates (F – on both ends, Ft – on one

end only).The connecting strip-section has no end anglepieces or plates seals (designation T).

L 300 to 1000 1100 to1500 1600 to 2000

Number of slots Number and diameter of inlet spigots

LD-17 LD-18 LD-17 LD-18 LD-17 LD-18

1 1x98 1x123 2x98 2x123 2x123 2x138

2 1x138 1x158 2x123 2x138 2x138 2x158

3 1x158 1x198 2x138 2x158 2x158 2x198

4 1x198 1x223 2x158 2x198 2x198 2x223

200


Fixing of the plenum box onto LD-17, LD-18 diffusers

Installation methods

types of air discharges

Fixing with self-tapping screws (U) Fixing with spring clamps (S) Fixing with a cross-member (Z)

Installation with hangers (P) Installation with a cross member without plenum box (N)

Different settings of the two slot model (similar combinations are possible also for diffusers with more slots).

Vertical – heating Horizontal – cooling

201

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

LVES

CIRC

ULAR

DIF

FUSE

RS,

SQUA

RE D

IFFU

SERS

SWIR

L DIFF

USER

S,

VARI

ABLE

SWIR

L DIFF

USER

SSL

OT D

IFFU

SERS

, RO

UND

DUCT

DIF

FUSE

RSAI

R DI

SPLA

CEM

ENT U

NITS

SUPP

LY A

IR N

OZZL

ESEX

TERN

AL E

LEM

ENTS

AIR

FLOW

CO

NTRO

L UNI

TS

SOUN

D AT

TENU

ATOR

S,

SOUN

D AT

TENU

ATIN

G LO

UVRE

S


100 300 500 1000

1

2

3

4

štev

ilo re

ž

Q (m /hm)3

LD-17

LD-18

Nr. o

f slo

ts

Quick selection diagram: LWA < 35 dB(A)

ordering key

I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the plenum box

(synthetic rubber based material)I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box

(synthetic rubber based material)N Diffuser installation with a cross-member without plenum boxP Installation of the plenum box with hangers

Z Fixing of the diffuser to the plenum box with a cross-memberS Fixing of the diffuser to the plenum box with spring clampsU Fixing of the diffuser to the plenum box with self-tapping screws


K Plenum box


F End plate on both endFT End plate on one end




LD-17 Slot diffuser typeLD-18

LD-17/1/B/E/K/M/S/P I5 L=1000 (length L=200, 300, …, 2000)

Note:• Please specify the deflector colour in your order.• Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order.• When installing in cooling ceilings, consult the manufacturer.• Versions with insulation on the inside of the plenum box are also available.

202


Sound power level, pressure drop and throw distances

LD-17 horizontal discharge

Type Q[l/s] 13.9 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3

[m³/h) 50 100 150 200 300 400 500 600 700 800 900 1000 1200

LD-17/1 L=500 mm

LWA [dB (A)] 32 47

Δpt [Pa] 13 42

L0.2 [m] 5.6 6.6

Lmin [m] 12.5 >15

LD-17/1 L=1000 mm

LWA [dB (A)] 27 35 43 50

Δpt [Pa] 8 27 56 95

L0.2 [m] 6 6.5 6.7 6.8

Lmin [m] 12 >15 >15 >15

LD-17/1 L=1500 mm

LWA [dB (A)] <25 29 34 40 50

Δpt [Pa] 5 16 32 52 99

L0.2 [m] 5.5 6.1 6.5 6.6 6.8

Lmin [m] 4 12.5 >15 >15 >15

LD-17/1 L=2000 mm

LWA [dB (A)] <25 32 36 43 49

Δpt [Pa] 2 3 6 11 19

L0.2 [m] 5.8 6.1 6.5 6.7 6.8

Lmin [m] 6.5 12.5 13 >15 >15

LD-17/2 L=500 mm

LWA [dB (A)] <25 34 42 50

Δpt [Pa] 3 11 22 36

L0.2 [m] 5 5.4 5.7 5.8

Lmin [m] 11.5 14 >15 >15

LD-17/2 L=1000 mm

LWA [dB (A)] 27 30 36 45 50

Δpt [Pa] 7 14 22 48 80

L0.2 [m] 5.3 5.4 5.5 5.7 5.8

Lmin [m] 8 13.2 13.4 >15 >15

LD-17/2 L=1500 mm

LWA [dB (A)] 26 30 36 42 46 52

Δpt [Pa] 8 13 28 44 65 84

L0.2 [m] 5.1 5.4 5.5 5.6 5.8 5.8

Lmin [m] 5.7 13.3 13.5 >15 >15 >15

LD-17/2 L=2000 mm

LWA [dB (A)] 26 32 36 41 44 48 51

Δpt [Pa] 2 4 7 10 13 18 22

L0.2 [m] 5.2 5.4 5.5 5.6 5.7 5.7 5.8

Lmin [m] 7.5 13.2 13.4 >15 >15 >15 >15

LD-17/3 L=500 mm

LWA [dB (A)] 30 37 45 54

Δpt [Pa] 5 12 20 50

L0.2 [m] 8 8.5 8.7 9

Lmin [m] 9 10.5 11.2 13.5

LD-17/3 L=1000 mm

LWA [dB (A)] <25 29 34 42 50

Δpt [Pa] 3 8 14 32 54

L0.2 [m] 7.7 7.9 8 8.5 8.8

Lmin [m] 6.4 6.9 9 11 12

LD-17/3 L=1500 mm

LWA [dB (A)] 28 35 42 48 53

Δpt [Pa] 8 19 34 52 79

L0.2 [m] 7.8 8.2 8.5 8.7 8.7

Lmin [m] 7.5 9.5 10.8 11.7 12.3

LD-17/3 L=2000 mm

LWA [dB (A)] 31 36 41 46 50 54

Δpt [Pa] 2 4 6 8 12 17

L0.2 [m] 7.9 8.1 8.4 8.5 8.6 9

Lmin [m] 7.7 9.6 10.5 11 11.9 12

203

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Type Q[l/s] 13.9 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3

[m³/h) 50 100 150 200 300 400 500 600 700 800 900 1000 1200

LD-17/4 L=500 mm

LWA [dB (A)] 25 32 40 51 55

Δpt [Pa] 3 7 12 29 50

L0.2 [m] 7.2 7.5 7.6 8 8.1

Lmin [m] 8.2 9 9.5 10.5 11.2

LD-17/4 L=1000 mm

LWA [dB (A)] 35 38 46 53 60

Δpt [Pa] 9 21 38 56 90

L0.2 [m] 7.5 7.6 7.7 7.9 8

Lmin [m] 8.3 9 9.5 10.5 10.5

LD-17/4 L=1500 mm

LWA [dB (A)] 32 38 44 48 52 60

Δpt [Pa] 10 19 30 44 60 80

L0.2 [m] 7.2 7.5 7.6 7.8 7.9 8

Lmin [m] 7.5 8.7 9.5 9.8 10.2 10.4

LD-17/4 L=2000 mm

LWA [dB (A)] 34 38 42 45 49 52 56 60

Δpt [Pa] 3 5 7 9 12 17 23 33

L0.2 [m] 7.4 7.5 7.6 7.8 7.8 7.8 7.9 8.3

Lmin [m] 8.2 8.6 9.2 9.5 9.7 10.2 10.5 11.3


LD-17 vertical discharge

Type Q[l/s] 13.9 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3

[m³/h) 50 100 150 200 300 400 500 600 700 800 900 1000 1200

LD-17/1 L=500 mmLWA [dB (A)] 32 47

Δpt [Pa] 17 68

L0.2 (+10K) [m] 2.4 4.8

LD-17/1 L=1000 mmLWA [dB (A)] 27 35 43 50

Δpt [Pa] 4 17 39 68

L0.2 (+10K) [m] 1 2.4 3.5 5

LD-17/1 L=1500 mmLWA [dB (A)] <25 29 34 40 50

Δpt [Pa] 2 8 17 30 68

L0.2 (+10K) [m] 0.9 1.5 2.3 3.3 4.7

LD-17/1 L=2000 mmLWA [dB (A)] <25 32 36 43 49

Δpt [Pa] 4 10 17 39 68

L0.2 (+10K) [m] 0.8 1.8 2.4 3.8 4.8

LD-17/2 L=500 mmLWA [dB (A)] 25 35 43 51

Δpt [Pa] 4 17 39 68

L0.2 (+10K) [m] 1.6 3 4 4.5

LD-17/2 L=1000 mmLWA [dB (A)] 28 31 37 46 51

Δpt [Pa] 4 10 17 39 68

L0.2 (+10K) [m] 1.6 2.6 3 4.2 4.5


LWA A-weighted sound power levelDpt Total pressure drop calculated to normal conditionsL0.2 Isothermal throw distance of supply air jet, when its velocity drops down to 0.2 m/s Lmin Minimum distance between diffusers, that the jet velocity is less than or equal to 0.2 m/s

conditions for Lmin:

Q=600 m³/hL=1000 mmRoom height: H=2.8 mOccupied zone height: 1.8 mRoom temperature: 24 °CSupply temperature: DT= -6 K

204


Type Q[l/s] 13.9 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3

[m³/h) 50 100 150 200 300 400 500 600 700 800 900 1000 1200

LD-17/2 L=1500 mmLWA [dB (A)] 26 30 36 42 46 52

Δpt [Pa] 4 8 17 30 48 68

L0.2 (+10K) [m] 1.6 2.5 3.2 3.6 4 4.5

LD-17/2 L=2000 mmLWA [dB (A)] 26 32 36 41 44 48 51

Δpt [Pa] 4 10 17 27 39 52 68

L0.2 (+10K) [m] 1.8 2.5 3.1 3.5 3.8 4.3 4.5

LD-17/3 L=500 mmLWA [dB (A)] 31 38 46 55

Δpt [Pa] 8 17 30 68

L0.2 (+10K) [m] 3.1 4.2 5.5 7.5

LD-17/3 L=1000 mmLWA [dB (A)] 31 36 44 52

Δpt [Pa] 4 8 17 30

L0.2 (+10K) [m] 1.9 3.1 4.2 5.5

LD-17/3 L=1500 mmLWA [dB (A)] 30 37 44 50 55

Δpt [Pa] 3 8 14 21 30

L0.2 (+10K) [m] 1.5 2.9 3.8 4.8 5.5

LD-17/3 L=2000 mmLWA [dB (A)] 32 37 42 47 51 55

Δpt [Pa] 4 8 12 17 23 30

L0.2 (+10K) [m] 1.9 3.1 3.8 4.3 5 5.5

LD-17/4 L=500 mmLWA [dB (A)] 27 34 42 53 57

Δpt [Pa] 4 10 17 39 68

L0.2 (+10K) [m] 3.1 4.3 5.2 6.8 7.7

LD-17/4 L=1000 mmLWA [dB (A)] 36 39 47 54 61

Δpt [Pa] 4 10 17 27 39

L0.2 (+10K) [m] 3 4.4 5.2 6.1 6.7

LD-17/4 L=1500 mmLWA [dB (A)] 33 39 45 49 53 61

Δpt [Pa] 4 8 12 17 23 30

L0.2 (+10K) [m] 2.9 4.1 4.8 5.2 5.8 6.2

LD-17/4 L=2000 mmLWA [dB (A)] 35 39 43 46 50 53 57 61

Δpt [Pa] 4 7 10 13 17 22 27 39

L0.2 (+10K) [m] 3.1 4 4.3 4.8 5.3 5.8 6.1 6.8


LWA A-weighted sound power levelDpt Total pressure drop calculated to normal conditionsL0.2 (+10 °c) Isothermal throw distance of supply air jet with temperature +10K,

when its velocity drops down to 0.2 m/s

205

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LD-18 horizontal discharge

Type Q[l/s] 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3 388.9

[m³/h) 100 150 200 300 400 500 600 700 800 900 1000 1200 1400

LD-18/1 L=500 mm

LWA [dB (A)] 41 51

Δpt [Pa] 24 53

L0.2 [m] 6.6 6.9

Lmin [m] >15 >15

LD-18/1 L=1000 mm

LWA [dB (A)] 29 37 44

Δpt [Pa] 16 36 64

L0.2 [m] 6.2 6.5 6.7

Lmin [m] 12.8 >15 >15

LD-18/1 L=1500 mm

LWA [dB (A)] 25 31 36 46

Δpt [Pa] 9 19 34 77

L0.2 [m] 5.8 6.2 6.4 6.6

Lmin [m] 4.2 12.8 >15 >15

LD-18/1 L=2000 mm

LWA [dB (A)] <25 28 32 40 47 53 58 62

Δpt [Pa] 1 2 4 9 15 24 35 47

L0.2 [m] 5.2 5.9 6.2 6.5 6.7 6.8 6.9 6.9

Lmin [m] 2 6.6 12.8 >15 >15 >15 >15 >15

LD-18/2 L=500 mm

LWA [dB (A)] 29 37 45 56

Δpt [Pa] 6 13 24 53

L0.2 [m] 5.4 5.6 5.7 5.8

Lmin [m] 14 >15 >15 >15

LD-18/2 L=1000 mm

LWA [dB (A)] <25 27 32 40 48

Δpt [Pa] 4 9 16 37 65

L0.2 [m] 5 5.3 5.5 5.6 5.7

Lmin [m] 2 8 13.4 >15 >15

LD-18/2 L=1500 mm

LWA [dB (A)] <25 27 34 40 45 50

Δpt [Pa] 5 9 20 35 55 80

L0.2 [m] 5 5.2 5.4 5.6 5.7 5.7

Lmin [m] 2 5.8 13.4 >15 >15 >15

LD-18/2 L=2000 mm

LWA [dB (A)] 25 30 35 39 44 47 51 54 57 62 67

Δpt [Pa] 1 3 6 9 13 18 23 29 36 52 71

L0.2 [m] 5 5.3 5.4 5.5 5.6 5.7 5.7 5.7 5.8 5.8 5.8

Lmin [m] 2 8 13.4 >15 >15 >15 >15 >15 >15 >15 >15

LD-18/3 L=500 mm

LWA [dB (A)] <25 31 37 48 56 63

Δpt [Pa] 3 6 11 24 42 66

L0.2 [m] 8 8.3 8.6 8.8 9 9.1

Lmin [m] 8 10 11.2 12.6 13.4 13.8

LD-18/3 L=1000 mm

LWA [dB (A)] <25 27 34 40 46 51 55

Δpt [Pa] 4 7 16 29 45 65 88

L0.2 [m] 7.7 8 8.3 8.6 8.7 8.8 8.9

Lmin [m] 6.4 8 10 11.2 12 12.6 13

LD-18/3 L=1500 mm

LWA [dB (A)] <25 29 34 38 42 46 50 53 56

Δpt [Pa] 4 9 15 24 34 47 61 77 96

L0.2 [m] 7.6 8 8.2 8.4 8.6 8.7 8.7 8.8 8.9

Lmin [m] 5.8 8.2 9.6 10.6 11.2 11.8 12.2 12.6 12.8

LD-18/3 L=2000 mm

LWA [dB (A)] 26 30 34 37 40 44 46 49 54 58

Δpt [Pa] 1 2 3 4 6 8 10 12 17 23

L0.2 [m] 7.7 8 8.2 8.4 8.5 8.6 8.6 8.7 8.8 8.9

Lmin [m] 6.4 8 9.2 10 10.8 11.2 11.8 12 12.6 13

206


Type Q[l/s] 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3 388.9

[m³/h) 100 150 200 300 400 500 600 700 800 900 1000 1200 1400

LD-18/4 L=500 mm

LWA [dB (A)] 28 34 44 52 58 64 68

Δpt [Pa] 3 6 13 24 37 53 72

L0.2 [m] 7.4 7.6 7.8 8 8.1 8.2 8.3

Lmin [m] 8.2 9 10.2 10.6 11 11.2 11.4

LD-18/4 L=1000 mm

LWA [dB (A)] <25 31 37 42 47 51 55 58

Δpt [Pa] 4 9 16 26 37 50 65 83

L0.2 [m] 7 7.4 7.6 7.7 7.8 7.9 8 8

Lmin [m] 6.2 8.2 9 9.6 10.2 10.4 10.6 10.8

LD-18/4 L=1500 mm

LWA [dB (A)] 26 31 35 38 42 45 48 51 56

Δpt [Pa] 5 9 14 20 28 36 46 57 82

L0.2 [m] 7 7.3 7.4 7.6 7.7 7.8 7.8 7.9 8

Lmin [m] 6.2 7.6 8.4 9 9.6 9.8 10 10.4 10.6

LD-18/4 L=2000 mm

LWA [dB (A)] 28 31 34 37 40 42 45 50 54

Δpt [Pa] 2 3 4 6 7 9 11 16 22

L0.2 [m] 7 7.2 7.4 7.5 7.6 7.7 7.7 7.8 7.9

Lmin [m] 6.2 7.4 8.2 8.6 9.2 9.4 9.8 10.2 10.4


Q=600 m³/hL=1000 mmRoom height: H=2.8 mOccupied zone height: 1.8 mRoom temperature: 24 °CSupply temperature: DT= -6 K


LWA A-weighted sound power levelDpt Total pressure drop calculated to normal conditionsL0.2 Isothermal throw distance of supply air jet, when its velocity

drops down to 0.2 m/sLmin Minimum distance between diffusers, that the jet velocity is

less than or equal to 0.2 m/s

207

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LD-18 vertical discharge

Type Q[l/s] 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3 388.9

[m³/h) 100 150 200 300 400 500 600 700 800 900 1000 1200 1400

LD-18/1 L=500 mmLWA [dB (A)] 40 51

Δpt [Pa] 25 56

L0.2 (+10K) [m] 3.4 5.1

LD-18/1 L=1000 mmLWA [dB (A)] 29 36 43

Δpt [Pa] 17 39 69

L0.2 (+10K) [m] 1.5 2.5 3.4

LD-18/1 L=1500 mmLWA [dB (A)] 25 31 36 45

Δpt [Pa] 10 21 38 86

L0.2 (+10K) [m] 0.7 1.5 2.2 3.5

LD-18/1 L=2000 mmLWA [dB (A)] 28 32 39 46 52 57

Δpt [Pa] 4 7 17 30 47 67

L0.2 (+10K) [m] 0.9 2 2.5 3.5 4.4 5.2

LD-18/2 L=500 mmLWA [dB (A)] 29 37 44 55

Δpt [Pa] 6 14 25 56

L0.2 (+10K) [m] 2.4 3.2 3.8 4.6

LD-18/2 L=1000 mmLWA [dB (A)] <25 27 32 40 47

Δpt [Pa] 4 10 17 39 69

L0.2 (+10K) [m] 1 1.9 2.4 3.2 3.8

LD-18/2 L=1500 mmLWA [dB (A)] <25 27 33 39 44 49

Δpt [Pa] 6 10 22 39 61 88

L0.2 (+10K) [m] 1.1 1.7 2.4 3 3.4 3.8

LD-18/2 L=2000 mmLWA [dB (A)] 25 30 35 39 43 47 50 53 56 61

Δpt [Pa] 2 5 9 15 21 29 38 48 59 85

L0.2 (+10K) [m] 1 1.9 2.4 2.9 3.2 3.5 3.8 4 4.3 4.6

LD-18/3 L=500 mmLWA [dB (A)] 23 30 36 46 54 60

Δpt [Pa] 3 6 11 25 44 69

L0.2 (+10K) [m] 1.9 3.1 4 5.7 7.1 8.2

LD-18/3 L=1000 mmLWA [dB (A)] <25 26 33 39 44 49 53

Δpt [Pa] 4 8 17 31 49 70 95

L0.2 (+10K) [m] 1.3 1.9 3.1 4 5 5.8 6.5

LD-18/3 L=1500 mmLWA [dB (A)] 23 28 33 37 41 45 48 51

Δpt [Pa] 5 10 18 28 41 56 73 92

L0.2 (+10K) [m] 1 1.9 2.7 3.4 4 4.7 5.2 5.8

LD-18/3 L=2000 mmLWA [dB (A)] 26 29 33 36 39 42 45 47 52 56

Δpt [Pa] 3 5 8 12 16 21 27 34 48 66

L0.2 (+10K) [m] 1.3 1.9 2.5 3.1 3.6 4 4.5 5 5.8 6.5

LD-18/4 L=500 mmLWA [dB (A)] 21 27 33 42 50 56 61

Δpt [Pa] 2 3 6 14 25 39 56

L0.2 (+10K) [m] 2.1 3.3 4.1 5.4 6.4 7.2 7.9


LWA A-weighted sound power levelDpt Total pressure drop calculated to normal conditions

L0.2 (+10 °c) Isothermal throw distance of supply air jet with temperature +10K, when its velocity drops down to 0.2 m/s

208


100

LD-17/1

Δp t

(Pa)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=500 mm 1500

2000

500 700

1000

30

2

LD-17/2

(Pa)

5

10

20

4050

100

200L=500 mm

1500

2000

1000

30

2

LD-17/4

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5

10

20

4050

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200 L=500 mm

1500

2000

1000

30

2

40

30

35

45

50

L WA (dB(A))

40

30

35

45

50

40

30

35

45

50

50 100Q (m /h) 3

150 200 300 500 70050 900

100

LD-17/3

(Pa)

Q (m /h) 3 200 300

5

10

20

4050

100

200L=500 mm

1500

2000

500 900700

1000

30

2

40

30

35

45

50

150 100Q (m /h) 3

200 300 500 900700150

Δp t

Δp t

Δp t

L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

Type Q[l/s] 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3 388.9

[m³/h) 100 150 200 300 400 500 600 700 800 900 1000 1200 1400

LD-18/4 L=1000 mmLWA [dB (A)] <25 30 36 41 45 49 53 56

Δpt [Pa] 4 10 18 27 39 54 70 89

L0.2 (+10K) [m] 2.1 3.3 4.1 4.8 5.4 6 6.5 6.9

LD-18/4 L=1500 mmLWA [dB (A)] 26 30 34 37 41 44 47 50 54

Δpt [Pa] 6 10 16 23 32 41 52 65 93

L0.2 (+10K) [m] 2.1 2.9 3.6 4.1 4.6 5 5.5 5.8 6.5

LD-18/4 L=2000 mmLWA [dB (A)] 27 30 33 36 39 41 44 48 52

Δpt [Pa] 3 5 7 10 13 16 20 29 39

L0.2 (+10K) [m] 2.1 2.8 3.3 3.8 4.2 4.5 4.8 5.5 6

Pressure drop(valid for horizontal discharge and plenum box with 100 % opened volume control damper)

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LD-17/2 Type of discharge Horizontal Vertical

Length Volume control damper Open Closed Open Closed

L=500∆pt x 1 x 2 x 1.0 x 2.2

LWA - + 4 + 1 + 2

L=1000∆pt x 1 x 2.3 x 1.2 x 2.2

LWA - + 4 + 1 + 2

L=1500∆pt x 1 x 2.3 x 1.2 x 2.3

LWA - + 3 - + 1

L=2000∆pt x 1 x 3 x 1.6 x 3.4

LWA - + 3 - + 1



L=500∆pt x 1 x 2.5 x 1.1 x 2.4

LWA - + 5 + 1 + 4

L=1000∆pt x 1 x 2.6 x 1.2 x 2.5

LWA - + 6 + 2 + 4

L=1500∆pt x 1 x 2.7 x 1.2 x 2.8

LWA - + 6 + 2 + 3

L=2000∆pt x 1 x 3.2 x 2.5 x 6

LWA - + 5 + 1 + 2



L=500∆pt x 1 x 2.2 x 1.2 x 2.4

LWA - + 6 + 2 + 3

L=1000∆pt x 1 x 2.4 x 1.2 x 2.4

LWA - + 5 + 1 + 3

L=1500∆pt x 1 x 2.7 x 1.2 x 2.7

LWA - + 6 + 1 + 2

L=2000∆pt x 1 x 5 x 1.9 x 4.3

LWA - + 6 + 1 + 2

correction factors



L=500∆pt x 1 x 1.1 x 1.1 x 1.5

LWA - + 1 - + 2

L=1000∆pt x 1 x 1.2 x 1.2 x 1.5

LWA - + 2 - + 1

L=1500∆pt x 1 x 1.3 x 1.2 x 1.6

LWA - + 2 - +1

L=2000∆pt x 1 x 2.9 x 2.0 x 2.7

LWA - + 2 - -

210


100

LD-18/1

(Pa)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=500 mm 1500

2000

500 1000700

1000

30

2

100

LD-18/2

(Pa)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=500 mm 1500

2000

500 1000700

1000

30

2

100

LD-18/3

(Pa)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=500 mm

1500

2000

500 1000700

1000

30

2

100

LD-18/4

(Pa)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200 L=500 mm

1500

2000

500 1000700

1000

30

2

40

30

35

45

50

40

30

35

45

50

40

30

35

45

50

1400

40

30

35

45

50

1200

Δp t

Δp t

Δp t

Δp t

L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

Pressure drop(valid for horizontal discharge and plenum box with 100 % opened volume control damper)

211

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L=500∆pt x 1 x 2.5 x 1.0 x 2.4

LWA - + 6 - + 3

L=1000∆pt x 1 x 2.5 x 1.1 x 2.5

LWA - + 6 - + 3

L=1500∆pt x 1 x 2.5 x 1.2 x 2.7

LWA - + 6 - + 2

L=2000∆pt x 1 x 3.1 x 2.8 x 6.5

LWA - + 6 - + 3



L=500∆pt x 1 x 2.1 x 1 x 2.1

LWA - + 3 - + 1

L=1000∆pt x 1 x 2.2 x 1.1 x 2.1

LWA - + 3 - + 1

L=1500∆pt x 1 x 2.2 x 1.1 x 2.2

LWA - + 3 - + 1

L=2000∆pt x 1 x 3 x 1.6 x 3.3

LWA - + 3 - + 1



L=500∆pt x 1 x 2.2 x 1 x 2.4

LWA - + 5 + 1 + 2

L=1000∆pt x 1 x 2.3 x 1.1 x 2.5

LWA - + 5 - + 2

L=1500∆pt x 1 x 2.6 x 1.1 x 2.6

LWA - + 5 - + 2

L=2000∆pt x 1 x 5 x 1.8 x 4.3

LWA - + 4 - + 2

correction factors



L=500∆pt x 1 x 1 x 1 x 1.4

LWA - + 1 - -

L=1000∆pt x 1 x 1.1 x 1.1 x 1.4

LWA - + 1 - -

L=1500∆pt x 1 x 1.2 x 1.1 x 1.5

LWA - + 1 - -

L=2000∆pt x 1 x 2.8 x 1.9 x 2.6

LWA - + 1 - -

212


L1 L1L

H1 A

L1 L1L

H1 A A

8

85 125

8

85 125

B

φD

60

H32

A

JJL/2 L/2

3

2 7

1

5

4

6

■ Nozzle diffuser LD-19

ApplicationNozzle diffuser LD-19 is designed for supply of warm or cold air and can be mounted in the wall or in the ceiling. Adjustable deflectors allow us to set different directions of air discharge.

Description Front plate is made of sheet steel and powder painted in white (RAL 9010) or any other RAL colour (on customer’s request). Individually adjustable nozzles are made of plastics in white (RAL 9010) or black (RAL 9005) colour.Plenum box is made of sheet steel. Nozzle diffusers are made in standard lenghts (one section) from 600 up to 2000 mm with 100 mm step.

Dimensions

L 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000

L1 552 652 752 852 476 526 576 626 676 726 776 826 876 926 976

No. of nozzles* 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

No. of rows A H1 B H

1 85 65 117 216.5

2 125 105 162 236.5

*Up to length L=900mm: fixing with 4 screws. Other sizes: fixing with 6 screws.

1. Plenum box 2. Spigot3. Volume control damper (M)4. Nozzle5. Cross bar6. Fixing screw7. Insulation (entire outside surface

of the plenum box)

213

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L DIFF

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Nastavitve kota šobe Hlajenje Gretje

B

φD

60

H32

A

JJL/2 L/2

Nastavitve kota šobe Hlajenje Gretje

Front plate installation

types of air discharge

Number and dimensions of spigots


L 600 – 1000 1100 – 1500 1600 – 2000

No. of rows Number and dimensions of spigots fD

1 1x123 2x123 2x138

2 1x158 2x138 2x158

With screws (V)

Installation with a cross-member (Z)

Installation on a cross bar can be made through the hole, in which is mounted a nozzle.

Installation of a plenum box with suspension bracket (P)

Possible angle settingsCooling

Heating

No. of inlet spigots

Standardlength


1 600-1000 L/2

2 1100-1500 J=300

2 1600-2000 J=400

214


ordering key

Note:Standard colour is RAL 9010. Other colours on customer’s request.

I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the

plenum box (synthetic rubber based material)I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the


P Installation of the plenum box with hangers

Z Fixing of the diffuser to the plenum box with a cross-memberV Visible installation (front plate without plenum box)


K Plenum box


1 Number of rows with nozzles2

LD-19 Nozzle diffuser

LD-19/1/B/K/M/Z/P/I5 L=1000 (length L=600, 700, …, 2000)

215

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L02 (m)L02 (m) L02 (m)L02 (m)

Quick selection


Horizontal discharge DT= 0K

Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400

LD-19/1 L=600 mm

LWA (dB(A)) 27 40 46.8 / / / /

∆pt (Pa) 12.8 47 101.2 / / / /

L0.2 (m) 2.7 3.5 4.1 / / / /

Lmin (m) 4.3 5.9 7.1 / / / /

LD-19/1 L=1000 mm

LWA (dB(A)) 21.4 33.7 40.8 44.8 / / /

∆pt (Pa) 5 17.7 37.7 64.6 / / /

L0.2 (m) 2.2 2.8 3.6 4.4 / / /

Lmin (m) 3.2 4.4 6.0 7.6 / / /

LD-19/1 L=1500 mm

LWA (dB(A)) 16.4 27.4 34.8 39.7 43.1 / /

∆pt (Pa) 2.3 7.9 16.9 28.9 43.8 / /

L0.2 (m) 2 2.5 2.8 3.3 3.9 / /

Lmin (m) 2.7 3.7 4.4 5.4 6.6 / /

LD-19/1 L=2000 mm

LWA (dB(A)) 13.1 22.8 30 35.2 39.1 41.9 45.5

∆pt (Pa) 1.4 4.6 9.7 16.5 25 35.2 60.4

L0.2 (m) 1.9 2.2 2.6 2.9 3.2 3.6 3.9

Lmin (m) 2.5 3.1 3.9 4.5 5.1 5.9 6.6

LD-19/2 L=600 mm

LWA (dB(A)) 19.1 30.9 38.2 / / / /

∆pt (Pa) 3.4 12.2 26 / / / /

L0.2 (m) 3.2 4.6 6.8 / / / /

Lmin (m) 5.4 8.2 12.6 / / / /

LD-19/2 L=1000 mm

LWA (dB(A)) 13.1 22.8 30 35.2 / / /

∆pt (Pa) 1.5 4.9 10.1 17.1 / / /

L0.2 (m) 2.7 3.5 4.3 5.4 / / /

Lmin (m) 4.3 5.9 7.6 9.8 / / /

LD-19/2 L=1500 mm

LWA (dB(A)) 10.3 18.4 24.9 30.1 34.2 / /

∆pt (Pa) 0.7 2.4 4.8 7.9 11.9 / /

L0.2 (m) 2.4 3 3.4 4.2 4.8 / /

Lmin (m) 3.7 4.9 5.7 7.3 8.5 / /

LD-19/2 L=2000 mm

LWA (dB(A)) 9.1 16.6 22.8 27.8 31.9 35.3 40.3

∆pt (Pa) 0.5 1.4 2.8 4.7 6.9 9.6 16.2

L0.2 (m) 2.4 2.8 3.1 3.6 4 4.4 5.6

Lmin (m) 3.6 4.4 5.1 6.1 6.9 7.7 10.1


LWA (dB(A)) Sound power levelDpt (Pa) Total pressure dropL0.2 (m) Isothermal throw length of supply air jet, when its speed drops down to 0.2 m/sLmin (m) Minimum distance between diffusers, that the jet velocity is less than or equal to 0.2 m/s


Room height: H=2.8 mOccupied zone height: 1.8 mRoom temperature: 24 °CSupply temperature by cooling: ΔT= - 6 K

216


L 02 (m

)

Vertical discharge DT= +5K

Type Q (l/s) 13.89 27.78 41.67 55.56 69.44 83.33 111.11

(m³/h) 50.00 100.00 150.00 200.00 250.00 300.00 400.00

LD-19/2 L=600 mmLWA (dB(A)) 19.1 30.9 38.2 / / / /∆pt (Pa) 3.4 12.2 26 / / / /L0.2 (m) 1.20 1.72 2.55 / / / /

LD-19/2 L=1000 mmLWA (dB(A)) 13.1 22.8 30 35.2 / / /∆pt (Pa) 1.5 4.9 10.1 17.1 / / /L0.2 (m) 1.16 1.45 1.64 2.03 / / /

LD-19/2 L=1500 mmLWA (dB(A)) 10.3 18.4 24.9 30.1 34.2 / /∆pt (Pa) 0.7 2.4 4.8 7.9 11.9 / /L0.2 (m) 1.07 1.33 1.51 1.87 2.14 / /

LD-19/2 L=2000 mmLWA (dB(A)) 9.1 16.6 22.8 27.8 31.9 35.3 40.3∆pt (Pa) 0.5 1.4 2.8 4.7 6.9 9.6 16.2L0.2 (m) 1.03 1.26 1.40 1.62 1.80 1.98 2.52


Vertical discharge DT= 0K

Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400





Vertical discharge DT= +10K

Type Q (l/s) 13.89 27.78 41.67 55.56 69.44 83.33 111.11

(m³/h) 50.00 100.00 150.00 200.00 250.00 300.00 400.00





Definitions of symbols

LWA (dB(A)) Sound power levelDpt (Pa) Total pressure dropL0.2 (m) Isothermal throw length of supply air jet, when its speed drops down to 0.2 m/s

217

VENT

ILAT

ING

GRIL

LES,

VE

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G VA

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CIRC

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RS,

SQUA

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L DIFF

USER

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L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

100

LD-19/1

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm 1500 2000

500 1000700

1000

30

2

100

LD-19/2

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm

1500

2000

500 1000700

1000

30

2

50

45

40

35

45

40

35

30

100

LD-20/1

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm 1500 2000

500 1000700

1000

30

2

30

25

40

35

100

LD-20/2

Δpt

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm

1500

2000

500 1000700

1000

30

2

20

25

30

35L WA

(dB(A))

L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

100

LD-19/1

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm 1500 2000

500 1000700

1000

30

2

100

LD-19/2

Δp t

(Pa

)Q (m /h) 3

150 200 300

5

10

20

4050

100

200L=600mm

1500

2000

500 1000700

1000

30

2

50

45

40

35

45

40

35

30

100

LD-20/1

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm 1500 2000

500 1000700

1000

30

2

30

25

40

35

100

LD-20/2

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm

1500

2000

500 1000700

1000

30

2

20

25

30

35

LD 19/2

Sound power level and pressure dropPressure drop by horizontal discharge and 100 % opened volume control damper.

correction factors applicable to LD-19

LD-19/1 LD-19/2

LengthVolume control damper Volume control damper

open closed open closed

L=600 X 1 X 1.3 X 1 X 1.8

L=1000 X 1 X 1.4 X 1 X 2

L=1500 X 1 X 1.5 X 1 X 2.2

L=2000 X 1 X 2 X 1 X 2.5

218

LD 19/1


L1 L1L

H1 A

L1 L1L

H1 A A

8

85 125

8

85 125

B

φD

60

H32

Aφ20

8

JJL/2 L/2

3

2 7

1

5

4

6

■ Nozzle diffuser LD-20

ApplicationNozzle diffuser LD-20 is designed to supply low quantities of air on big window surfaces to prevent condensation (ceiling installation near windows) or for big throws for cooling when wall installation (Coanda effect).

DescriptionThe front plate is made of sheet steel powder painted in white (RAL 9010) or any other RAL colour (on customer’s request). Individually adjustable nozzles are made from plastic in white (RAL 9010) or black (RAL 9005) colour. Plenum box is made of sheet steel. Nozzle diffuser LD-20 can be made in standard lenghts (one section) from 600 up to 2000 mm with 100 mm step.

L 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000

L1 552 652 752 852 476 526 576 626 676 726 776 826 876 926 976

No. of nozzles 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

No. of rows H1 B H A

1 65 117 216.5 85

2 105 162 236.5 125

1 Plenum box 2 Inlet spigot3 Volume control damper (M)4 Nozzle5 Cross-bar6 Fixing screw7 Insulation (entire outside surface of the

plenum box)

219

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

LVES

CIRC

ULAR

DIF

FUSE

RS,

SQUA

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SWIR

L DIFF

USER

S,

VARI

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L DIFF

USER

SSL

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SUPP

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AL E

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SOUN

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S,

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G LO

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150150

150

150

B

φD

60

H32

Aφ20

8

JJL/2 L/2

With screws(V)

Installation with a cross-member (Z) Installation on a cross bar can be made through the hole, in which is mounted a nozzle.

Installation of a plenum box with suspension bracket (P)

L 600 – 1000 1100 – 1500 1600 – 2000

No. of rows Number and dimensions of spigots fD

1 1x123 2x123 2x138

2 1x158 2x138 2x158

Possible angle settings

Front plate installation

Number and dimensions of spigots

Position of inlet spigots No. of inlet spigots

Standardlength


1 600-1000 L/2

2 1100-1500 J=300

2 1600-2000 J=400

220


ordering key

LD-20/1/B/K/M/Z/P/I5 L=1000 (lenght L=600, 700, …, 2000)

Note:Sandard colour is RAL 9010. Other colours on customer’s request.

I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the plenum

I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material)

P Installation of the plenum box with hangers

Z Fixing of the diffuser to the plenum box with a cross-memberV Visible installation (front plate without plenum box)


K Plenum box

B Black nozzlesW White nozzles

1 Number of rows with nozzles2

LD-20 Nozzle diffuser

221

VENT

ILAT

ING

GRIL

LES,

VE

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ATIN

G VA

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CIRC

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DIF

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USER

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L UNI

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SOUN

D AT

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Quick selection


Horizontal discharge DT=0K

Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400

LD-20/1 L=600 mm

LWA (dB(A)) 20 33.8 41 / / / /

∆pt (Pa) 13.5 35.6 74.8 / / / /

L0.2 (m) 6.6 > 10 > 10 / / / /

LD-20/1 L=1000 mm

LWA (dB(A)) 11 23.2 30 36 / / /

∆pt (Pa) 12 22 43 76 / / /

L0.2 (m) 3.8 6.6 9.3 > 10 / / /

LD-20/1 L=1500 mm

LWA (dB(A)) 8 14.5 25 31 35 37.5 43

∆pt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8

L0.2 (m) 2.1 3.5 5 6.4 7.9 9.3 > 10

LD-20/1 L=2000 mm

LWA (dB(A)) / 11 21 26.5 31 34.7 40

∆pt (Pa) / 7.5 15 23.7 33 45.5 75.2

L0.2 (m) / 2.5 3.6 4.6 5.7 6.7 7.5

LD-20/2 L=600 mm

LWA (dB(A)) 14 25 31 / / / /

∆pt (Pa) 2 8.3 18.3 / / / /

L0.2 (m) 4.2 9.1 > 10 / / / /

LD-20/2 L=1000 mm

LWA (dB(A)) / 19 24 27.8 31 / /

∆pt (Pa) / 4 8 15 22 / /

L0.2 (m) / 7.1 8.9 > 10 > 10 / /

LD-20/2 L=1500 mm

LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5

∆pt (Pa) / 2.4 4.7 7.6 13 17 28.5

L0.2 (m) / 4.3 5.3 6.2 7.3 8.1 8.9

LD-20/2 L=2000 mm

LWA (dB(A)) / 11 17 21.5 24 26.3 30.3

∆pt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4

L0.2 (m) / 2.8 3.5 4.0 4.7 5.3 5.8

222



Horizontal discharge DT=-5K

Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400

LD-20/1 L=600 mm

LWA (dB(A)) 20 33.8 41 / / / /

∆pt (Pa) 13.5 35.6 74.8 / / / /

L0.2 (m) 5.1 > 10 > 10 / / / /

LD-20/1 L=1000 mm

LWA (dB(A)) 11 23.2 30 36 / / /

∆pt (Pa) 12 22 43 76 / / /

L0.2 (m) 2.9 6.9 8.8 > 10 / / /

LD-20/1 L=1500 mm

LWA (dB(A)) 8 14.5 25 31 35 37.5 43

∆pt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8

L0.2 (m) 1.6 3.8 4.8 6.6 8.2 9.8 > 10

LD-20/1 L=2000 mm

LWA (dB(A)) / 11 21 26.5 31 34.7 40

∆pt (Pa) / 7.5 15 23.7 33 45.5 75.2

L0.2 (m) / 2.7 3.4 4.7 5.8 7.0 8.1

LD-20/2 L=600 mm

LWA (dB(A)) 14 25 31 / / / /

∆pt (Pa) 2 8.3 18.3 / / / /

L0.2 (m) 7.3 9.1 > 10 / / / /

LD-20/2 L=1000 mm

LWA (dB(A)) / 19 24 27.8 31 / /

∆pt (Pa) / 4 8 15 22 / /

L0.2 (m) / 4.7 7.1 9.3 > 10 / /

LD-20/2 L=1500 mm

LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5

∆pt (Pa) / 2.4 4.7 7.6 13 17 28.5

L0.2 (m) / 2.8 4.3 5.6 7.0 8.2 9.3

LD-20/2 L=2000 mm

LWA (dB(A)) / 11 17 21.5 24 26.3 30.3

∆pt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4

L0.2 (m) / 1.8 2.8 3.6 4.5 5.3 6.0

223

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

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CIRC

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DIF

FUSE

RS,

SQUA

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SERS

SWIR

L DIFF

USER

S,

VARI

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SWIR

L DIFF

USER

SSL

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UND

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R DI

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CEM

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SUPP

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OZZL

ESEX

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AL E

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AIR

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CO

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L UNI

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D AT

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S,

SOUN

D AT

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L02 (m)

L02 (m)

L02 (m)

L02 (m)


Horizontal discharge DT=-10K

Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400

LD-20/1 L=600 mm

LWA (dB(A)) 20 33.8 41 / / / /

∆pt (Pa) 13.5 35.6 74.8 / / / /

L0.2 (m) 3.5 8.5 > 10 / / / /

LD-20/1 L=1000 mm

LWA (dB(A)) 11 23.2 30 36 / / /

∆pt (Pa) 12 22 43 76 / / /

L0.2 (m) 2 4.9 8.1 > 10 / / /

LD-20/1 L=1500 mm

LWA (dB(A)) 8 14.5 25 31 35 37.5 43

∆pt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8

L0.2 (m) 1.1 2.6 4.4 5.9 7.3 9.1 > 10

LD-20/1 L=2000 mm

LWA (dB(A)) / 11 21 26.5 31 34.7 40

∆pt (Pa) / 7.5 15 23.7 33 45.5 75.2

L0.2 (m) / 1.9 3.1 4.2 5.3 6.6 7.5

LD-20/2 L=600 mm

LWA (dB(A)) 14 25 31 / / / /

∆pt (Pa) 2 8.3 18.3 / / / /

L0.2 (m) 3.4 4.3 7.74 / / / /

LD-20/2 L=1000 mm

LWA (dB(A)) / 19 24 27.8 31 / /

∆pt (Pa) / 4 8 15 22 / /

L0.2 (m) / 2.5 4.5 6.7 9.7 / /

LD-20/2 L=1500 mm

LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5

∆pt (Pa) / 2.4 4.7 7.6 13 17 28.5

L0.2 (m) / 1.5 2.7 4.0 5.8 6.9 8.3

LD-20/2 L=2000 mm

LWA (dB(A)) / 11 17 21.5 24 26.3 30.3

∆pt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4

L0.2 (m) / 1.0 1.8 2.6 3.8 4.5 5.4


LWA (dB(A)) Sound power levelDpt (Pa) Total pressure dropL0.2 (m) Isothermal throw length of supply air jet, when its speed drops down to 0.2 /s

224



Vertical discharge DT=0K

Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400

LD-20/1 L=600 mm

LWA (dB(A)) 20 33.8 41 / / / /

∆pt (Pa) 13.5 35.6 74.8 / / / /

L0.2 (m) 5.2 > 10 > 10 / / / /

LD-20/1 L=1000 mm

LWA (dB(A)) 11 23.2 30 36 / / /

∆pt (Pa) 12 22 43 76 / / /

L0.2 (m) 3.2 7.4 9.4 > 10 / / /

LD-20/1 L=1500 mm

LWA (dB(A)) 8 14.5 25 31 35 37.5 43

∆pt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8

L0.2 (m) 1.5 3.9 6.6 9.8 > 10 > 10 > 10

LD-20/1 L=2000 mm

LWA (dB(A)) / 11 21 26.5 31 34.7 40

∆pt (Pa) / 7.5 15 23.7 33 45.5 75.2

L0.2 (m) / 2.6 4.6 6.6 9 > 10 > 10

LD-20/2 L=600 mm

LWA (dB(A)) 14 25 31 / / / /

∆pt (Pa) 2 8.3 18.3 / / / /

L0.2 (m) 2.7 5.4 8.8 / / / /

LD-20/2 L=1000 mm

LWA (dB(A)) / 19 24 27.8 31 / /

∆pt (Pa) / 4 8 15 22 / /

L0.2 (m) / 3 5.4 7.2 8.9 / /

LD-20/2 L=1500 mm

LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5

∆pt (Pa) / 2.4 4.7 7.6 13 17 28.5

L0.2 (m) / 3.3 4.6 6.1 7.7 9.4 > 10

LD-20/2 L=2000 mm

LWA (dB(A)) / 11 17 21.5 24 26.3 30.3

∆pt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4

L0.2 (m) / 1.9 2.6 3.4 4.2 5.1 7.1

225

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Vertical discharge DT=+5K

Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400

LD-20/1 L=600 mm

LWA (dB(A)) 20 33.8 41 / / / /

∆pt (Pa) 13.5 35.6 74.8 / / / /

L0.2 (m) 3.9 > 10 > 10

LD-20/1 L=1000 mm

LWA (dB(A)) 11 23.2 30 36 / / /

∆pt (Pa) 12 22 43 76 / / /

L0.2 (m) 2 5.1 8.6 > 10 / / /

LD-20/1 L=1500 mm

LWA (dB(A)) 8 14.5 25 31 35 37.5 43

∆pt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8

L0.2 (m) 1.2 3 5.1 7.5 > 10

LD-20/1 L=2000 mm

LWA (dB(A)) / 11 21 26.5 31 34.7 40

∆pt (Pa) / 7.5 15 23.7 33 45.5 75.2

L0.2 (m) / 2.1 3.6 5.2 7 9.1 > 10

LD-20/2 L=600 mm

LWA (dB(A)) 14 25 31 / / / /

∆pt (Pa) 2 8.3 18.3 / / / /

L0.2 (m) 2.3 5.9 > 10 / / / /

LD-20/2 L=1000 mm

LWA (dB(A)) / 19 24 27.8 31 / /

∆pt (Pa) / 4 8 15 22 / /

L0.2 (m) / 3 5.4 7.2 8.4 / /

LD-20/2 L=1500 mm

LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5

∆pt (Pa) / 2.4 4.7 7.6 13 17 28.5

L0.2 (m) / 1.85 3.1 4.5 6.2 7.9 > 10

LD-20/2 L=2000 mm

LWA (dB(A)) / 11 17 21.5 24 26.3 30.3

∆pt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4

L0.2 (m) / 1.6 2.2 3.2 4.3 5.4 8

226




Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400

LD-20/1 L=600 mm

LWA (dB(A)) 20 33.8 41 / / / /

∆pt (Pa) 13.5 35.6 74.8 / / / /

L0.2 (m) 2.6 6.3 > 10 / / / /

LD-20/1 L=1000 mm

LWA (dB(A)) 11 23.2 30 36 / / /

∆pt (Pa) 12 22 43 76 / / /

L0.2 (m) 1.5 3.6 6.2 8.8 / / /

LD-20/1 L=1500 mm

LWA (dB(A)) 8 14.5 25 31 35 37.5 43

∆pt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8

L0.2 (m) 1.5 2 3.3 4.8 6.5 8.3 > 10

LD-20/1 L=2000 mm

LWA (dB(A)) / 11 21 26.5 31 34.7 40

∆pt (Pa) / 7.5 15 23.7 33 45.5 75.2

L0.2 (m) / 1.4 2.4 3.4 4.6 5.8 8.5

LD-20/2 L=600 mm

LWA (dB(A)) 14 25 31 / / / /

∆pt (Pa) 2 8.3 18.3 / / / /

L0.2 (m) 1.5 4.5 8.2 / / / /

LD-20/2 L=1000 mm

LWA (dB(A)) / 19 24 27.8 31 / /

∆pt (Pa) / 4 8 15 22 / /

L0.2 (m) / 2 3.6 5.3 7.4 / /

LD-20/2 L=1500 mm

LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5

∆pt (Pa) / 2.4 4.7 7.6 13 17 28.5

L0.2 (m) / 1.1 2.1 3.3 4.6 6.1 9.2

LD-20/2 L=2000 mm

LWA (dB(A)) / 11 17 21.5 24 26.3 30.3

∆pt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4

L0.2 (m) / 0.7 1.3 2.1 3 3.9 6.1

227

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L 02 (m

)

L 02 (m

)



Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1

(m³/h) 50 100 150 200 250 300 400

LD-20/1 L=600 mm

LWA (dB(A)) 20 33.8 41 / / / /

∆pt (Pa) 13.5 35.6 74.8 / / / /

L0.2 (m) 1.8 4.5 7.9 / / / /

LD-20/1 L=1000 mm

LWA (dB(A)) 11 23.2 30 36 / / /

∆pt (Pa) 12 22 43 76 / / /

L0.2 (m) 1.1 2.6 4.3 5.1 / / /

LD-20/1 L=1500 mm

LWA (dB(A)) 8 14.5 25 31 35 37.5 43

∆pt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8

L0.2 (m) 1.1 1.4 2.4 3.5 4.6 6 8.8

LD-20/1 L=2000 mm

LWA (dB(A)) / 11 21 26.5 31 34.7 40

∆pt (Pa) / 7.5 15 23.7 33 45.5 75.2

L0.2 (m) / 1 1.6 2.4 3.3 4.2 6.1

LD-20/2 L=600 mm

LWA (dB(A)) 14 25 31 / / / /

∆pt (Pa) 2 8.3 18.3 / / / /

L0.2 (m) 1.2 3.1 5.6 / / / /

LD-20/2 L=1000 mm

LWA (dB(A)) / 19 24 27.8 31 / /

∆pt (Pa) / 4 8 15 22 / /

L0.2 (m) / 1.6 2.4 3.7 5.3 / /

LD-20/2 L=1500 mm

LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5

∆pt (Pa) / 2.4 4.7 7.6 13 17 28.5

L0.2 (m) / 1 1.5 2.3 3.2 4.2 6.3

LD-20/2 L=2000 mm

LWA (dB(A)) / 11 17 21.5 24 26.3 30.3

∆pt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4

L0.2 (m) / 0.6 0.9 1.5 2.1 2.8 4.2


LWA (dB(A)) Sound power levelDpt (Pa) Total pressure dropL0.2 (m) Isothermal throw length of supply air jet, when its speed drops down to 0.2 m/s

228


L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

100

LD-19/1

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm 1500 2000

500 1000700

1000

30

2

100

LD-19/2

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm

1500

2000

500 1000700

1000

30

2

50

45

40

35

45

40

35

30

100

LD-20/1

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm 1500 2000

500 1000700

1000

30

2

30

25

40

35

100

LD-20/2

Δp t

(Pa

)Q (m /h) 3

150 200 300

5

10

20

4050

100

200L=600mm

1500

2000

500 1000700

1000

30

2

20

25

30

35L WA

(dB(A))

L WA (dB(A))

L WA (dB(A))

L WA (dB(A))

100

LD-19/1

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm 1500 2000

500 1000700

1000

30

2

100

LD-19/2

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm

1500

2000

500 1000700

1000

30

2

50

45

40

35

45

40

35

30

100

LD-20/1

Δp t

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm 1500 2000

500 1000700

1000

30

2

30

25

40

35

100

LD-20/2

Δpt

(Pa

)

Q (m /h) 3 150 200 300

5

10

20

4050

100

200L=600mm

1500

2000

500 1000700

1000

30

2

20

25

30

35

Sound power level and pressure drop Pressure drop by horizontal discharge and 100 % opened volume control damper

correction factors applicable to LD-20

LD-20/1 LD-20/2

LengthVolume control damper Volume control damper

open closed open closed

L=600 X 1 X 1.25 X 1 X 1.6

L=1000 X 1 X 1.3 X 1 X 1.8

L=1500 X 1 X 1.4 X 1 X 2

L=2000 X 1 X 1.8 X 1 X 2.3

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AI

RAL9010

CD

15 130 15

57

100

18.5

150

230

180

330

280

8.5

32

45.5

72.5

59

86

15 130 15

57

100

18.5

150

230

180

330

280

8.5

32

45.5

72.5

59

86

15 130 15

57

100

18.5

150

230

180

330

280

8.5

32

45.5

72.5

59

86

15 130 15

57

100

18.5

150

230

180

330

280

8.5

32

45.5

72.5

59

86

15 130 15

57

100

18.5

150

230

180

330

280

8.5

32

45.5

72.5

59

86

15 130 15

57

100

18.5

150

230

180

330

280

8.5

32

45.5

72.5

59

86

■ Floor Slot Diffusers LD-16N

ApplicationLD-16N floor slot diffusers are a suitable solution for swimming pools and similar rooms with large glass surfaces and windows. They are designed for installati-on in the floor. Warm air is supplied in the upwards direction, towards the window. With appropriate dimensions, proper air supply is guaranteed, free of excessive draught or noise (LWA<35 dB(A)).

DescriptionLD-16N slot diffusers are designed in 1, 2, 3, 4, 5 and 6 slot versions. They are made of fixed aluminium sections and an aluminium structural frame.The diffusers are available in single piece lengths 200 mm to 2000 mm. Painting according to the customer’s specification is available on order.

Advantages• No glass misting• Optimal ventilation• No heat losses• Low pressure drop• Prevents the descent of cold air along

windows• Does not cause heating of air near the

windows even in the sunshine• Easy installation

Versions

single slot LD-16N/1 two slots LD-16N/2 three slots LD-16N/3

four slots LD-16N/4 five slots LD-16N/5 six slots LD-16N/6

230


5

10

15

20

25

1000 2000 3000 4000 6000 7000 8000Q (m 3/h)

LD

-16

/1

LD

-1N/2

L D- 16

/3

L D- 16N/4

L D -16N/5

L D -16N/6

5000

LWA < 35 dB(A) Δpt = 80 Pa/mv ef = 2.5 m/s

L (m

)

v ef

N

6

N

max 0.2m

1

2

3

ordering key

Installation method

Fast selection diagramLwA < 35 dB(A); Vef =2,5 m/s; Dpt = 16 Pa

1 glass2 LD-16N slot diffuser3 air supply channel

Example

The available floor area next to the glass surface is 15 m in length. The calculated supplied air flow rate is 4000 m³/h. From the diagram, the type: LD-16N/3 L=15m is selected.

Q (m³/h) Air flow rateLWA (dB(A)) Sound power levelΔpt (Pa) Pressure dropL (m) Slot diffuser lengthvef (m/s) Effective air velocity

LD-16N / 1 / L / n

Note:Standard colour is RAL 9010.

Number of longitudinal sections (pieces)

Single piece length (L = 200, 300, …, 2000)


LD-16N Floor slot diffuser

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St

RAL9010

8

7

6

m

1

2

3

4

5 C3

A

H

9

φ D

φ

8

7

6

■ Panel design slot diffusers LDP-13, LDP-14

ApplicationPanel design slot diffusers are designed for the supply of air in rooms with floor to ceiling heights from 2.4 m to 4 m. They are suitable for supplying either cold or warm air.

DescriptionLDP-13 and LDP-14 consists of a diffuser face plate and a plenum box. The diffuser face plate is commonly made of sheet steel and its design can be suited to the customer’s requirements. Longitudinal guides, fitting tight to the sheet steel, are inserted in the diffuser face plate. Cylindri-cal deflectors, made of recycled plastics (ABS-antistatic) are installed in the guides, to allow free adjustment of both air jet discharge direction and flow rate. The number of slots per unit depends on the size of the unit. Diffuser face plate is pow-der painted in a RAL 9010 scale colour, or, on special orders, in other colours. The deflectors, equal to those of LD-13 or LD-14 slot diffusers, are white or black as standard. The plenum box is made of galvanised sheet steel. It is fitted with a flow rate control damper, designed for fine air flow rate adjustment.

type• LDP-13 m = 12 mm• LDP-14 m = 22 mm

1 Plenum box2 Volume control damper3 Inlet spigot4 Cross member5 Diffuser face plate6 Guide7 Air deflector8 Spring clamp

LDP-13 LDP-14

Size фC3 Slot length фA фD H No. of slots h No. of slots h

400 395 300 370 198 320 8

25

6

40500 495 400 470 198 320 10 6

600 595 500 570 248 380 12 8

625 620 500 570 248 380 12 8

232


ordering key

Special ordersOn special order, we can deliver diffuser face plates of any design. The shape and dimensions are specified in agreement with the designer or customer.

technical dataTecnical data are determined upon the definition of the shape, design, number of discharge slots and other factors.

Fast flow rate determination (at LWA < 35 dB(A))LPD-13: flow rate per 1 meter length

≈100 m³/hLPD-14: flow rate per 1 meter length

≈150 m³/h

Size (400, 500, 600, 625)

I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the plenum box

(synthetic rubber based material)I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box

(synthetic rubber based material)


K Plenum box


LDP-13LDP-14

LDP-13/B/K/M/I Size 400

Note:• Please specify the deflector colour in your order. • Versions with insulation on the inside of the plenum box are also available.

233

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St

RAL9010

Dφ

60 60L

Lv 60L

Lv

L5

LvL

60

d

23 1

LD L LV

/ 1000 800

1505 750 2 X 500

1755 875 2 X 600

2005 1000 2 X 800

■ Round Duct Diffuser SKD-13

ApplicationRound duct diffusers SKD-13 are designed for supplying air to the rooms with large floor to ceiling heights, e.g. conference halls, gyms, industrial halls etc. They can be installed at any location wi-thin the duct network, which renders them suitable for supplying of either hot or cold air.The T register model is designed to control the supply air flow-rate at the individual diffuser level. The T register design is recom-mended for installations with several round duct diffusers in one line. In such cases, the flow-rates of the diffusers near the line beginning should be slightly reduced, in order to supply adequate amounts of air to the diffusers farther along the line.

DescriptionThe duct diffuser consists of galvanised round cross-section tubes with inserted longitudinal guides, fitting tight into the tubes. Cylindri-cal deflectors made of recycled plastics are inserted into the guides, to allow continuous adjustment of discharged air direction within the 360o range. Diffusers are available with different number of slots. The tube is painted in a RAL 9010 scale colour, or, on special orders, in other colours. The deflectors, equal to those of LD-13 slot diffusers, are white or black as standard. A T register, made of galvanised sheet steel, is inserted in the SKD--13D/T. The T register The setting piece is adjusted with a gear mo-ved using a straight screwdriver. The gear can be accessed through a hole in the cover.

Diffuser structure for lengths exceeding 1000 mm

Note: фD is the diffuser internal diameter.

Round duct diffusers

1. SKD-13D2. T-register3. Gear

234

Slot diffusers, Round duct diffusersRound duct diffusers

Lv

L

H

60

Ød Ød Ød

4020

4040

407

L

r

7

Ød Ød Ød

4020

4040

407

L

r

7

Ød Ød Ød

4020

4040

407

L

r

7

L L 87

φD

L40 407

SKD-13/D Joining piece Tube Joining piece SKD-13/D

Installation of SKD-13/D

SKD-13/RSKD-13/R is constructed for installations into round ducts with square openings.

L LV H No. of slots

ΦD of tube

Openings

L-35 H-35

580 500 100 1 150-355 545 65

680 600 150 2 355-900 645 115

880 800 200 3 600-2400 845 165

880 800 250 4 600-2400 845 215

Accessories

Size d L,r

150 148.7-149.3 150

160 158.7-159.3 160

180 178.6-179.3 180

200 198.6-199.3 200

224 222.5-223.3 224

250 248.5-249.3 250

280 278.4-279.3 280

300 298.4-299.3 300

315 313.4-314.3 315

355 353.3-354.3 355

400 398.3-399.3 400

450 448.2-449.3 450

500 498.2-499.3 500

560 558.1-559.3 560

630 628.1-629.3 630

710 708.0-709.3 710

800 798.1-799.3 800

900 897.0-899.3 900

Elbow 900

Joining piece

End cover

Installation of SKD-13/R:

Note: фd is the external diameter.

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ordering key SKD-13D

Note:• Please specify the deflector colour in your order. Other colours on customer's

request.

types of discharge

Heating – vertical 90°Cooling – one sided – right (horizontal)Cooling – one sided left (horizontal)

For determination of air velocity data at different throw distances and temperature differences, please use software for air distribution elements calculation KLIMA ADE.

Cooling – two-sided horizontal discharge Cooling – alternate sided horizontal discharge

Length

Number of slots

Tube diameter

T-register


Tube

SKD-13D /B /T /ф355 /2 L=1000 mm

ordering key SKD-13R

Length

Number of slots

Tube diameter

T-register


R Diffuser designed for installation into round ducts

SKD-13R /B /T /ф355 /2 L=680 mm, H=150 mm

Example accessory specification:

Accessory: Elbow 900Colour: RAL 9010Quantity: 1 piece

236


Pipe length Ld [mm](Slot length Lv [mm])

No. of slots Lwa[dB(a)]

Recommended air flow volume [m³/h]

150, 160, 180 200, 224, 250 280, 300, 315, 355 400, 450 500, 560 630, 710, 800, 900

1000 (800)

2 26 128 128 128 128 128 128

4 30 256 256 256 256 256 256

6 34 384 384 384 384

8 35 512 512 512

10 36 640 640 640

12 37 768 768

14 38 896 896

1505 (2 x 500)

2 35 160 160 160 160 160 160

4 38 320 320 320 320 320 320

6 40 480 480 480 480

8 41 640 640 640

10 46 800 800 800

12 46 960 960

14 47 1120

1755 (2 x 600)

2 30 192 192 192

4 32 384 384 384

6 33 576 576

8 35 768

10 38 960

2005 (2 x 800)

2 30 256 256 256

4 32 512 512 512

6 34 768 768

8 37 1024

10 40 1280

Other dimensions are available on request.

The recommended air flow is 80 m³/h m per meter of active slot length.

Pressure drop determination diagram

v air jet velocity in the duct

237

VENT

ILAT

ING

GRIL

LES,

VE

NTIL

ATIN

G VA

LVES

CIRC

ULAR

DIF

FUSE

RS,

SQUA

RE D

IFFU

SERS

SWIR

L DIFF

USER

S,

VARI

ABLE

SWIR

L DIFF

USER

SSL

OT D

IFFU

SERS

, RO

UND

DUCT

DIF

FUSE

RSAI

R DI

SPLA

CEM

ENT U

NITS

SUPP

LY A

IR N

OZZL

ESEX

TERN

AL E

LEM

ENTS

AIR

FLOW

CO

NTRO

L UNI

TS

SOUN

D AT

TENU

ATOR

S,

SOUN

D AT

TENU

ATIN

G LO

UVRE

S

160

140

120

1009080

70

60

50

40

1

2

3

4

5

6

30

5 10 15 20 25 30

5

10

10 15 20 25 30 40

V [

m /

hm sl

ot]

v [

m/s

]du

ct3

Total pressure p [Pa] at the SKD-13 diffuser

without T register

with T register

15 20 25 30 35 40

15 20 3025 35 40

25 30 35 40 45 50

35 40 45 50 55 60


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