Type WG-KUL

Combination with a non-return damper

Combinations of external weather louvres and non-return dampers as a protection against the direct ingress of rain, leaves and birds, and to prevent air from flowing against the intended airflow direction.

  • Maximum width of 2000 mm, maximum height of 1665 mm
  • Low differential pressure due to aerofoil blades
  • Low air-regenerated noise
  • All aerodynamic data is measured in aerodynamics and acoustics laboratories
  • Maximum differential pressure: 100 Pa
  • Available in standard sizes and many intermediate sizes
  • Pre-assembled combination, hence fast and easy to install


Optional equipment and accessories

  • Installation subframe
  • Insect screen
  • Powder-coated or anodised surface

Combination of external weather louvre and non-return damper, variant WG-AL-KUL-1 00136504_0


  • Application
  • Description

Application

  • Combinations of Type WG external weather louvres and Type KUL non-return dampers for protecting fresh air and exhaust air openings in air conditioning systems
  • Protection against the direct ingress of rain as well as against leaves and birds
  • Recommended face velocity for fresh air openings: 2 – 2.5 m/s max.
  • Prevention of unwanted airflows against the intended airflow direction when the system is not in operation
  • Blades close automatically when the system is shut down

Special characteristics

  • Any intermediate sizes within the standard size range are available
  • Low installation effort on site since external weather louvre and non-return damper are factory combined and assembled
  • Operating temperature 20 – 80 °C
  • For very large sizes, several combinations can be arranged side by side or on top of each other
  • Maximum pressure of 100 Pa
  • Low differential pressure due to aerofoil blades
  • Non-return dampers are opened and closed by the airflow; no actuator is required

Nominal sizes

  • B: 400, 600, 800, 1000, 1200, 1400, 1600 mm (intermediate sizes: 201 – 1599 mm, in increments of 1 mm)
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665 mm (intermediate sizes: 183 – 1664 mm, in increments of 1 mm)
  • Any combination of B × H

Variants

  • WG-KUL: External weather louvre made of galvanised sheet steel, with non-return damper
  • WG-AL-KUL: External weather louvre made of aluminium, with non-return damper
  • 1: Fresh air opening
  • 2: Exhaust air opening

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Casing of non-return damper
  • Blades with low-friction bearings
  • Blade restrictors
  • Blade tip seals
  • Bottom travel stop (angle section)
  • Visible mullion at the rear from B = 1000 mm

Accessories

  • Installation subframe: Installation subframe for the fast and simple installation of external weather louvres

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Non-return damper

  • Casing, material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • Additional side bar with fixing holes to accommodate the blade shafts and integral blade restrictors (pins)
  • Blade restrictors prevent the blades from opening beyond a certain angle

Materials and surfaces

  • Border, mullion and blades made of formed galvanised sheet steel or aluminium
  • Wire mesh made of galvanised steel or stainless steel
  • Casing and travel stop of the non-return damper made of galvanised sheet steel
  • Blades made of formed aluminium
  • Mullion (from B = 1000 mm) made of galvanised sheet steel
  • Blade shafts made of brass
  • Side bar made of PVC plastic
  • Blade tip seals made of foamed polyester
  • Blade restrictors made of plastic
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Contamination should be removed as it may lead to corrosion and to increased closed blade air leakage

Technical information

Function, Technical data, Quick sizing, Specification text, Order code, related Products

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
  • related Products
Schematic illustration of WG-KUL 00100145_0
① WG border
② WG regular blades
③ WG bottom blade
④ WG wire mesh
⑤ KUL casing
⑥ KUL blade
⑦ KUL blade tip seal


Functional description

External weather louvres are externally mounted air transfer devices for the fresh air and exhaust air of air conditioning systems. They are installed in external walls and façades. Their narrowly arranged blades give good protection against the direct ingress of rain as well as against leaves and birds.

Under certain unfavourable conditions, such as heavy rain, and depending on the airflow velocity it might happen that slight quantities of water enter together with the air.

This is why the airflow velocity in fresh air openings should not exceed 2 – 2.5 m/s.


Non-return dampers close automatically.

When the system is in operation, the blades open when air flows.

When the system is shut down, the blades close due to their weight. They safely prevent air from flowing against the intended airflow direction.

Nominal sizes

200 × 180 to 1600 × 1665 mm

Volume flow rate range

40 – 6260 l/s or 144 – 22536 m³/h at 2.5 m/s

Free area

Approx. 60 %, with insect screen approx. 45 %

Total differential pressure – exhaust air

55 Pa at 2.5 m/s

Total differential pressure – fresh air

60 Pa at 2.5 m/s

Operating temperature

–20 to 80 °C

Maximum pressure

100 Pa


Quick sizing tables provide a good overview of the volume flow rates with an airflow velocity of 2.5 m/s. Values for intermediate widths can be interpolated. Precise intermediate values and volume flow rates for other airflow velocities can be calculated with our Easy Product Finder design programme.

The sound power levels LWA apply to external weather louvres with a flow cross section of 1 m².

WG, width 200 – 1200 mm, volume flow rate at 2.5 m/s

Height Width [mm]
Height 200 400 600 800 1000 1200
mm l/s m³/h l/s m³/h l/s m³/h l/s m³/h l/s m³/h l/s m³/h

165

40

144

80

288

120

432

160

576

200

720

240

864

330

125

450

245

882

370

1332

490

1764

615

2214

735

2646

495

205

738

410

1476

615

2214

820

2952

1025

3690

1230

4428

660

290

1044

575

2070

865

3114

1150

4140

1440

5184

1725

6210

825

370

1332

740

2664

1110

3996

1480

5328

1850

6660

2220

7992

990

455

1638

905

3258

1360

4896

1810

6516

2265

8154

2715

9774

1155

535

1926

1070

3852

1605

5778

2140

7704

2675

9630

3210

11556

1320

620

2232

1235

4446

1855

6678

2470

8892

3090

11124

3705

13338

1485

700

2520

1400

5040

2100

7560

2800

10080

3500

12600

4200

15120

1650

785

2826

1565

5634

2350

8460

3130

11268

3915

14094

4695

16902

1815

865

3114

1730

6228

2595

9342

3460

12456

4325

15570

5190

18684

1980

950

3420

1895

6822

2845

10242

3790

13644

4740

17064

5690

20484

2145

1030

3708

2060

7416

3090

11124

4120

14832

5150

18540

6180

22248

2310

1115

4014

2225

8010

3340

12024

4450

16020

5560

20016

6680

24048

2740

1235

4446

2470

8892

3705

13338

4940

17784

6180

22248

7410

26676

3070

1400

5040

2800

10080

4200

15120

5600

20160

7000

25200

8400

30240

3400

1565

5634

3130

11268

4695

16902

6260

22536

7830

28188

9390

33804

3730

1730

6228

3460

12456

5190

18684

6920

24912

8650

31140

10380

37368

4060

1895

6822

3790

13644

5690

20484

7580

27288

9480

34128

11370

40932

4390

2060

7416

4120

14832

6180

22248

8240

29664

10300

37080

12360

44496

4720

2225

8010

4450

16020

6680

24048

8900

32040

11130

40068

13350

48060


WG, width 1400 – 2400 mm, volume flow rate at 2.5 m/s

Height Width [mm]
Height 1400 1600 1800 2000 2200 2400
mm l/s m³/h l/s m³/h l/s m³/h l/s m³/h l/s m³/h l/s m³/h

165

280

1008

320

1152

360

1296

400

1440

440

1584

480

1728

330

860

3096

980

3528

1105

3978

1225

4410

1350

4860

1470

5292

495

1435

5166

1640

5904

1845

6642

2050

7380

2255

8118

2460

8856

660

2015

7254

2300

8280

2590

9324

2875

10350

3165

11394

3450

12420

825

2590

9324

2960

10656

3330

11988

3700

13320

4070

14652

4440

15984

990

3170

11412

3620

13032

4075

14670

4525

16290

4980

17928

5430

19548

1155

3745

13482

4280

15408

4815

17334

5350

19260

5890

21204

6420

23112

1320

4325

15570

4940

17784

5560

20016

6180

22248

6790

24444

7410

26676

1485

4900

17640

5600

20160

6300

22680

7000

25200

7700

27720

8400

30240

1650

5480

19728

6260

22536

7040

25344

7830

28188

8610

30996

9390

33804

1815

6060

21816

6920

24912

7790

28044

8650

31140

9520

34272

10380

37368

1980

6630

23868

7580

27288

8530

30708

9480

34128

10420

37512

11370

40932

2145

7210

25956

8240

29664

9270

33372

10300

37080

11330

40788

12360

44496

2310

7790

28044

8900

32040

10010

36036

11130

40068

12240

44064

13350

48060

2740

8650

31140

9880

35568

11120

40032

12350

44460

13590

48924

14820

53352

3070

9800

35280

11200

40320

12600

45360

14000

50400

15400

55440

16800

60480

3400

10960

39456

12520

45072

14090

50724

15650

56340

17220

61992

18780

67608

3730

12110

43596

13840

49824

15570

56052

17300

62280

19030

68508

20760

74736

4060

13270

47772

15160

54576

17060

61416

18950

68220

20850

75060

22740

81864

4390

14420

51912

16480

59328

18540

66744

20600

74160

22660

81576

24720

88992

4720

15580

56088

17800

64080

20030

72108

22250

80100

24480

88128

26700

96120


WG, width 2900 – 4900 mm, volume flow rate at 2.5 m/s

Height Width [mm]
Height 2900 3300 3700 4100 4500 4900
mm l/s m³/h l/s m³/h l/s m³/h l/s m³/h l/s m³/h l/s m³/h

165

560

2016

640

2304

720

2592

800

2880

880

3168

960

3456

330

1715

6174

1960

7056

2205

7938

2450

8820

2695

9702

2940

10584

495

2870

10332

3280

11808

3690

13284

4100

14760

4510

16236

4920

17712

660

4025

14490

4600

16560

5180

18648

5750

20700

6330

22788

6900

24840

825

5180

18648

5920

21312

6660

23976

7400

26640

8140

29304

8800

31968

990

6340

22824

7240

26064

8150

29340

9050

32580

9960

35856

10860

39096

1155

7490

26964

8560

30816

9630

34668

10700

38520

11770

42372

12840

46224

1320

8650

31140

9880

35568

11120

40032

12350

44460

13590

48924

14820

53352

1485

9800

35280

11200

40320

12600

45360

14000

50400

15400

55440

16800

60480

1650

10960

39456

12520

45072

14090

50724

15650

56340

17220

61992

18780

67608

1815

12110

43596

13840

49824

15570

56052

17300

62280

19030

68508

20750

74736

1980

13270

47772

15160

54576

17060

61416

18950

68220

20850

75060

22750

81864

2145

14420

51912

16480

59328

18540

66744

20600

74160

22660

81576

24700

88992

2310

15580

56088

17800

64080

20030

72108

22250

80100

24480

88128

26700

96120

2740

17290

62244

19760

71136

22230

80028

24700

88920

27170

97812

29650

106704

3070

19600

70560

22400

80640

25200

90720

28000

100800

30800

110880

33600

120960

3400

21910

78876

25040

90144

28170

101412

31300

112680

34430

123948

37550

135216

3730

24220

87192

27680

99648

31140

112104

34600

124560

38060

137016

41500

149472

4060

26530

95508

30320

109152

34110

122796

37900

136440

41690

150084

45500

163728

4390

28840

103824

32960

118656

37080

133488

41200

148320

45320

163152

49450

177984

4720

31150

112140

35600

128160

40050

144180

44500

160200

48950

176220

53400

192240


Differential pressure and sound power level

v Installation type
v A and C B and D
v Δpt LWA Δpt LWA
m/s Pa dB(A) Pa dB(A)

1.5

10

32

14

34

2

20

41

25

43

2.5

30

48

35

50

3

45

54

55

56

4

75

63

95

66

5

115

70

145

73

6

170

76

210

79


Combinations of an external weather louvre and a non-return damper.

Rectangular external weather louvre as a protection of air conditioning systems against the direct ingress of rain, leaves and birds into fresh air and exhaust air openings.

Rectangular non-return damper to prevent air from flowing against the intended airflow direction.

Ready-to-install component which consists of a border, aerofoil rain defence blades, and a wire mesh at the rear.

Non-return damper which consists of a casing, blades with low-friction bearings, and travel stop and sealing parts.

Special characteristics

  • Any intermediate sizes within the standard size range are available
  • Low installation effort on site since external weather louvre and non-return damper are factory combined and assembled
  • Operating temperature 20 – 80 °C
  • For very large sizes, several combinations can be arranged side by side or on top of each other
  • Maximum pressure of 100 Pa
  • Low differential pressure due to aerofoil blades
  • Non-return dampers are opened and closed by the airflow; no actuator is required

Materials and surfaces

  • Border, mullion and blades made of formed galvanised sheet steel or aluminium
  • Wire mesh made of galvanised steel or stainless steel
  • Casing and travel stop of the non-return damper made of galvanised sheet steel
  • Blades made of formed aluminium
  • Mullion (from B = 1000 mm) made of galvanised sheet steel
  • Blade shafts made of brass
  • Side bar made of PVC plastic
  • Blade tip seals made of foamed polyester
  • Blade restrictors made of plastic
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

Technical data

  • Nominal sizes: 200 × 180 to 1600 × 1665 mm
  • Volume flow rate range: 40 – 6260 l/s or 144 – 22536 m³/h at 2.5 m/s
  • Free area: approx. 60 %, with insect screen approx. 45 %
  • Total differential pressure – exhaust air: 55 Pa at 2.5 m/s
  • Total differential pressure – fresh air: 60 Pa at 2.5 m/s
  • Operating temperature: –20 – 80 °C
  • Maximum pressure: 100 Pa

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [dB(A)]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

00240721_0

 Type
WG-KUL       Combination of external weather louvre and non-return damper

 Material – WG
       No entry: galvanised steel
AL       Aluminium

 Construction – WG
       No entry: wire mesh
1       Insect screen, galvanised steel
2       Wire mesh, stainless steel (only WG-AL)
3       Insect screen and wire mesh made of stainless steel (only WG-AL)

 WG border
       No entry: With fixing holes
U       Without fixing holes

 

 Airflow direction
1       Fresh air opening
2       Exhaust air opening

 Nominal size [mm]
       B × H

 Installation subframe – WG
       No entry: None
ER       With (not for construction without fixing holes)

 Surface – WG
       No entry: standard construction
P1       Powder-coated, RAL Classic colour
PS       Powder-coated, DB colour
       Only for WG-AL
S2       Anodised to EURAS standard, E6-C-… (31 to 35)
S3       Anodised to EURAS standard, E6-C-0

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Order example: WG–KUL–1/1600×600/ER

Material – WG

Galvanised steel

Construction – WG

Wire mesh

Direction of airflow

Fresh air opening

Nominal size

1600×600 mm

Installation subframe – WG

With

Surface – WG

Standard construction


 

Variants, Dimensions and weight

  • Variants
  • Dimensions and weight

WG-KUL

Variants

  • External weather louvre made of galvanised sheet steel, with non-return damper
  • 1: Fresh air opening
  • 2: Exhaust air opening

Nominal sizes

  • B: 400, 600, 800, 1000, 1200, 1400, 1600 mm (intermediate sizes: 201 – 1599 mm, in increments of 1 mm)
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665 mm (intermediate sizes: 183 – 1664 mm, in increments of 1 mm)
  • Any combination of B × H

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Casing of non-return damper
  • Blades with low-friction bearings
  • Blade restrictors
  • Blade tip seals
  • Bottom travel stop (angle section)
  • Visible mullion at the rear from B = 1000 mm

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Non-return damper

  • Casing, material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • Additional side bar with fixing holes to accommodate the blade shafts and integral blade restrictors (pins)
  • Blade restrictors prevent the blades from opening beyond a certain angle

Materials and surfaces

External weather louvre

  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour

WG-AL-KUL

Variant

  • External weather louvre made of aluminium, with non-return damper
  • 1: Fresh air opening
  • 2: Exhaust air opening

Nominal sizes

  • B: 400, 600, 800, 1000, 1200, 1400, 1600 mm (intermediate sizes: 201 – 1599 mm, in increments of 1 mm)
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665 mm (intermediate sizes: 183 – 1664 mm, in increments of 1 mm)
  • Any combination of B × H

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Casing of non-return damper
  • Blades with low-friction bearings
  • Blade restrictors
  • Blade tip seals
  • Bottom travel stop (angle section)
  • Visible mullion at the rear from B = 1000 mm

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Non-return damper

  • Casing, material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • Additional side bar with fixing holes to accommodate the blade shafts and integral blade restrictors (pins)
  • Blade restrictors prevent the blades from opening beyond a certain angle

Materials and surfaces

External weather louvre

  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour
  • S2: Anodised to EURAS standard, E6-C-31...35
  • S3: Anodised to EURAS standard, E6-C-0

Materials

Part Order code detail Material Notes

Border

Profiled, galvanised sheet steel

Material thickness 1.5 mm

Border

AL

Extruded aluminium sections, material no. EN AW-6060 T66

Material thickness 1.7 mm

Blades

Profiled, galvanised sheet steel

Material thickness 0.63 mm

Blades

AL

Extruded aluminium sections, material no. EN AW-6060 T66

Material thickness 1,35 mm

Mullion

Profiled, galvanised sheet steel

From B = 1385 mm

Stabilising mullion

AL

Extruded aluminium sections, material no. EN AW-6060 T66

From B = 1385 mm

Wire mesh

Galvanised steel


Wire mesh

2

Stainless steel, material no. 1.4301

Only WG-AL-KUL

Wire mesh

3

Stainless steel, material no. 1.4301

Only WG-AL-KUL

Insect screen

1

Galvanised steel

Only WG-AL-KUL

Insect screen

3

Stainless steel, material no. 1.4301

Only WG-AL-KUL

Casing and travel stop of the non-return damper

Galvanised sheet steel


Blades

Formed aluminium


Centre mullion

Galvanised sheet steel

From B = 1000 mm

Blade shafts

Brass


Side bars

Plastic PVC


Blade tip seals

Foamed polyester


Blade restrictors

Plastic



Surfaces

Part Order code detail Surface Notes

Border and blades

Untreated


Border and blades

P1-RAL ...

Powder-coated, RAL colour ... CLASSIC


Border and blades

PS-NCS ...

Powder-coated, NCS colour ...


Border and blades

S2

Anodised to EURAS standard, E6-C-31 to E6-C-35

Only WG-AL-KUL

Border and blades

S3

Anodised to EURAS standard, E6-C-0

Only WG-AL-KUL


Flow cross section to calculate the airflow velocity

  • A = B × (H − 0.125)

Unit of measure for B and H: mm

WG-KUL, weight

H B [mm]
H 200 400 600 800 1000 1200 1400 1600
mm kg

180

9

10

14

18

22

26

30

34

345

12

14

18

22

26

30

34

38

510

15

18

22

27

31

36

41

46

675

17

22

27

33

38

44

49

54

840

18

24

29

35

40

46

52

58

1005

21

27

33

40

46

53

59

65

1170

23

31

38

45

52

59

66

72

1335

25

33

41

49

56

64

71

79

1500

27

35

43

51

59

67

75

83

1665

30

38

46

54

62

70

78

86


WG-AL-KUL, weight

H B [mm]
H 200 400 600 800 1000 1200 1400 1600
mm kg

180

8

9

13

17

20

24

27

30

345

11

12

16

20

23

27

29

33

510

14

16

19

24

27

31

34

38

675

15

20

24

29

33

38

42

47

840

16

21

25

30

34

40

44

50

1005

18

24

28

35

40

47

51

56

1170

20

27

33

41

46

52

56

62

1335

21

29

37

45

50

56

61

68

1500

24

32

39

47

53

59

65

72

1665

27

36

42

50

56

63

68

75


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature
Wall installation without installation subframe 00101957_0..

Illustration shows WG-KUL-1

Installation and commissioning

  • With or without installation subframe
  • Vertical installation
  • Straight upstream section required (at least B + H) on the pressure side of fans
  • Ensure a gradual start-up of fans to avoid a sudden pressure increase

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise for the louvre

A [m²]

Upstream cross section

v [m/s]

Airflow velocity based on the upstream cross section

vt [m/s]

Airflow velocity based on the upstream cross section (type NL)

V [m³/h] and [l/s]

Volume flow rate

Δpt [Pa]

Total differential pressure


All sound power levels are based on 1 pW.

Principal dimensions

B [mm]

Duct width

B₁ [mm]

Duct width for subdivided louvres

H [mm]

Duct height

H₁ [mm]

Duct height for subdivided louvres

n [ ]

Number of flange screw holes

m [kg]

Weight

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Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265