Water repellent safety ventilation grille W475

Ventilation grille type 475 is a grille for wall installation with special water-repellent blades (class A up to 0 m/s according to EN13030:2011).

Description

Made of aluminum profiles: AlMgSi 0.5 (according to EN 12020-2)Surface finish: natural color (E6/EV1) anodized (20 microns) or powder coated in all RAL colors (60 - 80 microns)L-shaped frame profiles made of extruded aluminum with a total height of 64 mm are mitered at an angle of 45 degrees and assembled by pressing them together with the help of brackets. Aluminum slat holders are riveted to the perforated vertical frame profiles.Extruded aluminum slats are clipped into the slat holders. The distance between the slats is 75 mm each.
The slats are designed so that water can not stand, and thus less quickly get dirty.
With insect screen made of 304 stainless steel, 2.3×2.3 mm mesh (6×6 mm mesh on request), tightened in the frame by means of a nylon cord.
Standard design with water drainage channel at the bottom
Water tightness : the grille 475 has class A2 at an air velocity of 0 m/s, according to EN13030:2001.
Certificate BSRIA available on request.
Options: Water leg, Removable insect screen, Filter, without stop frame

Type 475 has outstanding water repellent properties, ideal for exhaust applications.

Please note : reinforcing profiles are always provided from a width of 700 mm.

DIMENSIONS
Installation depth: 82 mm
Slat spacing: 75 mm
Frame stop: 50 mm
Total thickness: 87 mm

TECHNICAL DATA (with insect screen 2.3 x 2.3 mm)

Air passage :
K-factor (supply): 10.89
K-factor (rejection): 10.41
Ce coefficient: 0.303
Cd coefficient: 0.310

Cross section :
Physical free cross section: 53
Optical free cross section: 87

Water tightness (according to EN13030):
Water tightness class at 0.0 m/s : A2
Water tightness class at 0.5 m/s : B2
Water tightness class at 1.0 m/s : B2
Water tightness class at 1.5 m/s : C2

ASSEMBLY
Easy installation due to special wall anchors 429
Note: For grids with an area greater than approximately 3 m², a rear support structure must be provided.

STANDARDS

This product has been tested according to the following standards :
EN 13141-1 (volume flow calculation)
EN 12020-2 (aluminum standard)
EN AW 6063 T66 (alloy aluminum)
EN 13030 (water tightness)