Type WGF

Specifically for façade installation

External weather louvres – specifically for façade installation – as a protection of air conditioning systems against the direct ingress of rain, leaves and birds into fresh air and exhaust air openings

  • Maximum width of 2000 mm, maximum height of 2500 mm per section
  • For the installation into façades or for the construction of enclosures for machinery or electrical equipment
  • Low differential pressure due to aerofoil blades
  • Low air-regenerated noise
  • All aerodynamic data is measured in aerodynamics and acoustics laboratories
  • Variants made of galvanised sheet steel or aluminium
  • Flexible arrangement of sections for covering large areas (should then be fixed on a support structure which is to be provided by others)


Optional equipment and accessories

  • Corner section
  • Insect screen
  • Powder-coated or anodised

External weather louvre, variant WGF-AL-T 00136517_0


  • Application
  • Description

Application

  • External weather louvres of Type WGF for the fresh air and exhaust air openings of 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.

Special characteristics

  • Low differential pressure and low noise due to aerofoil blades
  • Large-size covering of air intake and discharge openings on external walls, and complete façades; uniform look with regular blades, without distracting flanges
  • Robust construction
  • Very large dimensions (height and width) are available since any number of sections can be fitted side by side or on top of each other (support structure required)
  • Free area approx. 50 %

Nominal sizes

Middle section

  • B: 1000, 1200, 1400, 1600, 1800, 2000 mm (intermediate sizes: 201 – 1999 mm, in increments of 1 mm)
  • H: 500, 625 , 750, 875, 1000, 1250, 1500, 1750, 2000, 2250, 2500 mm (intermediate sizes: 1125 – 2375 mm, in increments of 125 mm)
  • Any combination of B × H


Corner section

  • B: 600 × 600 mm (angle)
  • H: 500, 625 , 750, 875, 1000, 1250, 1500, 1750, 2000, 2250, 2500 mm (intermediate sizes: 1125 – 2375 mm, in increments of 125 mm)

Variants

  • WGF-T: Façade weather louvre made of galvanised sheet steel, middle section
  • WGF-E: Façade weather louvre made of galvanised sheet steel, corner section
  • WGF-AL-T: Façade weather louvre made of aluminium, middle section
  • WGF-AL-E: Façade weather louvre made of aluminium, corner section

Construction

  • Wire mesh made of galvanised steel
  • 2: Wire mesh, stainless steel (only WGF-AL)

Parts and characteristics

  • Serrated angle sections (left and right)
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Fixing elements for the blades, serrated angle section (if B > 2000 mm: combination of several serrated angle sections) and wire mesh

Construction features

  • Free area of approx. 50 %
  • Serrated angle section, with fixing holes on side and rear, material thickness 3 mm
  • 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

Materials and surfaces

  • Blades made of formed galvanised sheet steel or extruded aluminium sections
  • Serrated angle sections made of formed galvanised sheet steel
  • Wire mesh made of galvanised steel
  • Serrated angle sections, powder-coated black (RAL 9005)
  • 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

Technical information

Function, Technical data, Quick sizing, Specification text, Order code, Related products

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
Schematic illustration of WGF 00102795_0
① Middle section WGF-AL-T
② Corner section WGF-AL-E
① Bottom blade
② Regular blades
③ Fixing element for wire mesh
④ Serrated angle section, right side
⑤ Serrated angle section, left side
⑥ Fixing holes
⑦ Fixing element to join serrated angle sections
⑧ Wire mesh; additional insect screen as an option
⑨ Fixing element for blades


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.

Nominal sizes (middle section)

1000 × 500 to 2000 × 2500 mm

Volume flow rate range (middle section)

940 – 11880 l/s or 3384 – 42768 m³/h

Free area

Approx. 50 %

Total differential pressure – exhaust air

50 Pa at 2.5 m/s (façade installation)

Total differential pressure – fresh air

60 Pa at 2.5 m/s (façade installation)


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.

WGF, volume flow rate at 2.5 m/s

Height Width [mm]
Height 1000 1200 1400 1600 1800 2000
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

500

940

3384

1125

4050

1315

4734

1500

5400

1690

6084

1875

6750

625

1250

4500

1500

5400

1750

6300

2000

7200

2250

8100

2500

9000

750

1565

5634

1875

6750

2190

7884

2500

9000

2815

10134

3125

11250

875

1875

6750

2250

8100

2625

9450

3000

10800

3375

12150

3750

13500

1000

2190

7884

2625

9450

3065

11034

3500

12600

3940

14184

4375

15750

1250

2815

10134

3375

12150

3940

14184

4500

16200

5060

18216

5630

20268

1500

3440

12384

4125

14850

4815

17334

5500

19800

6190

22284

6880

24768

1750

4065

14634

4875

17550

5690

20484

6500

23400

7310

26316

8130

29268

2000

4690

16884

5630

20268

6560

23616

7500

27000

8440

30384

9380

33768

2250

5310

19116

6380

22968

7440

26784

8500

30600

9560

34416

10630

38268

2500

5940

21384

7130

25668

8310

29916

9500

34200

10690

38484

11880

42768


WGF, corner section, volume flow rate at 2.5 m/s

Height Corner section 90° [mm]
Height 600/600
mm l/s m³/h

500

1125

4050

625

1500

5400

750

1875

6750

875

2250

8100

1000

2625

9450

1250

3375

12150

1500

4125

14850

1750

4875

17550

2000

5630

20268

2250

6380

22968

2500

7130

25668


Differential pressure and sound power level

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

1.5

22

40

18

38

25

45

2

38

49

32

47

40

54

2.5

60

56

50

54

55

61

3

85

62

75

59

90

66

4

150

70

130

68

160

75

5

230

77

200

75

250

82

6

335

83

290

81

360

88


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

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

Special characteristics

  • Low differential pressure and low noise due to aerofoil blades
  • Large-size covering of air intake and discharge openings on external walls, and complete façades; uniform look with regular blades, without distracting flanges
  • Robust construction
  • Very large dimensions (height and width) are available since any number of sections can be fitted side by side or on top of each other (support structure required)
  • Free area approx. 50 %

Materials and surfaces

  • Blades made of formed galvanised sheet steel or extruded aluminium sections
  • Serrated angle sections made of formed galvanised sheet steel
  • Wire mesh made of galvanised steel
  • Serrated angle sections, powder-coated black (RAL 9005)
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

Construction

  • Wire mesh made of galvanised steel
  • 2: Wire mesh, stainless steel (only WGF-AL)

Technical data

  • Nominal sizes (middle section): 1000 × 500 – 2000 × 2500 mm
  • Volume flow rate range (middle section): 940 – 11880 l/s or 3384 – 42768 m³/h
  • Free area: approx. 50 %
  • Total differential pressure – exhaust air: 50 Pa at 2.5 m/s (façade installation)
  • Total differential pressure – fresh air: 60 Pa at 2.5 m/s (façade installation)

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.

00135508_0

 Type
WGF       External weather louvres for façades

 Material
       No entry: galvanised steel
AL       Aluminium

 Section
E       Corner section
T       Middle section

 

 Construction
       No entry: wire mesh, galvanised steel
2       Wire mesh, stainless steel (only for material AL)

 Nominal size [mm]
       B × H

 Surface
       No entry: standard construction
P1       Powder-coated, RAL Classic colour
PS       Powder-coated, DB colour
       Only for WGF-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 %

If middle sections and corner sections are arranged in vertical tiers, the upper sections will have only regular blades; only the lower sections will have a bottom blade. Sections to be used as upper sections must be specified when ordering.

Order example: WGF–T/1600×1250/P1–RAL 7001

Material

Galvanised steel

Section

Middle section

Construction

Wire mesh, galvanised steel

Nominal size

1600×1250 mm

Surface

Powder-coated, RAL 7001, silver grey


 

Variants, Dimensions and weight

  • Variants
  • Dimensions and weight

Materials

Part Order code detail Material Notes

Blades

Formed galvanised sheet steel, material no. DX51D+Z150-200-NAC

Material thickness 1,25 mm

Blades

AL

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

Material thickness 2 mm

Serrated angle sections

Galvanised sheet steel, material no. DX51D+Z150-200-NAC

Material thickness 3 mm

Wire mesh

Galvanised steel


Wire mesh

2

Stainless steel, material no. 1.4301

Only WGF-AL


Surfaces

Part Order code detail Surface Notes

Blades

Untreated


Blades

P1-RAL ...

Powder-coated, RAL colour ... CLASSIC


Blades

PS-NCS ...

Powder-coated, NCS colour ...


Blades

S2

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

Only WGF-AL

Blades

S3

Anodised to EURAS standard, E6-C-0

Only WGF-AL

Serrated angle sections

Powder-coated RAL 9005, jet black

Gloss level 70 %


Flow cross section to calculate the airflow velocity

  • A = B × (H − 0.125)

Unit of measure for B and H: mm

WGF, weight

H WGF-T WGF-AL-T
H B [mm]
H 1000 1200 1400 1600 1800 2000 1000 1200 1400 1600 1800 2000
mm kg

500

16

17

18

21

23

25

12

13

14

15

16

17

625

19

22

24

27

29

32

14

16

17

18

19

21

750

23

26

29

32

35

38

17

19

20

22

23

26

875

27

30

34

37

41

44

20

22

24

25

27

30

1000

31

35

39

43

47

51

23

25

27

29

31

34

1250

33

38

43

48

53

61

28

31

34

36

39

42

1500

43

50

56

61

68

73

34

37

41

44

47

51

1750

51

59

65

71

79

86

39

43

48

51

55

59

2000

59

67

74

82

90

97

45

49

55

59

63

68

2250

67

76

83

91

102

109

50

55

62

66

71

76

2500

74

84

93

102

112

121

56

61

69

74

79

85


WGF, corner section, weight

H WGF-E WGF-AL-E
H B [mm]
H 600 × 600
mm kg

500

17

13

625

22

16

750

26

19

875

30

22

1000

35

25

1250

38

31

1500

50

37

1750

59

43

2000

67

49

2250

76

55

2500

84

61


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Fix the top and bottom blades to both serrated angle sections
  • Align the serrated angle sections with both blades to the support structure and fix it (fixing material to be provided by others)
  • Fix the remaining blades to the serrated angle sections
  • Fix wire mesh to the rear of the blades
  • Install additional sections
  • Connect the serrated angle sections of the individual louvre sections with each other

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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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.: +971 4 3417448 | Fax: +971 4 3417449