Application
Special characteristics
Nominal sizes
Variants
Parts and characteristics
Accessories
Construction features
External weather louvre
Non-return damper
Materials and surfaces
Maintenance
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 |
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 |
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
Materials and surfaces
Technical data
Sizing data
Air-regenerated noise
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.
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Notes on the order code
⑥ The nominal size equals the dimensions of the duct connected to the non-return damper. Depending on the size of the installation opening, an installation subframe may have to be used.
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 |
WG-KUL
Variants
Nominal sizes
Parts and characteristics
Construction features
External weather louvre
Non-return damper
Materials and surfaces
External weather louvre
WG-AL-KUL
Variant
Nominal sizes
Parts and characteristics
Construction features
External weather louvre
Non-return damper
Materials and surfaces
External weather louvre
Materials
– | Front border | Formed sheet steel, galvanised | Material thickness 1.5 mm |
– | Blades | Formed sheet steel, galvanised | Material thickness 0.63 mm |
– | Mullion | Formed sheet steel, galvanised | From B = 1385 mm |
– | Wire mesh | Galvanised steel | |
– | Casing and travel stop (angle section) of the non-return damper | Galvanised sheet steel | |
– | Blades | Formed aluminium | |
– | Centre mullion | Galvanised sheet steel | From B = 1000 mm |
– | Blade shafts | Brass | |
– | Side bar | PVC plastic | |
– | Blade tip seals | Foamed polyester | |
– | Blade restrictors | Plastic | |
AL | Front border | Extruded aluminium sections, material no. EN AW-6060 T66 | Material thickness 1.7 mm |
AL | Blades | Extruded aluminium sections, material no. EN AW-6060 T66 | Material thickness 1.35 mm |
AL | Stabilising mullion | Extruded aluminium sections, material no. EN AW-6060 T66 | From B = 1385 mm |
1 | Insect screen | Galvanised steel | Only WG-AL-JZ |
2 | Wire mesh | Stainless steel, material no. 1.4301 | Only WG-AL-JZ |
3 | Wire mesh | Stainless steel, material no. 1.4301 | Only WG-AL-JZ |
3 | Insect screen | Stainless steel, material no. 1.4301 | Only WG-AL-JZ |
Surfaces
– | Border and blades | Untreated | |
P1-RAL ... | Border and blades | Powder-coated, RAL ... CLASSIC | |
PS-DB ... | Border and blades | Powder-coated, DB ... | |
S2 | Border and blades | Anodised to EURAS standard, E6-C-31...35 | Only WG-AL-KUL |
S3 | Border and blades | Anodised to EURAS standard, E6-C-0 | Only WG-AL-KUL |
WG-KUL, weight
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
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 and commissioning
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
Nous sommes à votre disposition
Veuillez préciser votre message et le type de demande
Tel.: +32 (0) 2/522 07 80
Contact
Merci pour votre message !
Votre message a été envoyé et sera traité dans les plus brefs délais.
Notre département de traitement des demandes prendra contact avec vous dès que possible.
Pour les questions d'ordre général concernant les produits ou services, vous pouvez aussi nous appeler :
Tel.: +32 (0) 2/522 07 80