Circular egg crate grille for transfer/extract air and wall/ceiling mounting
Extract air
91% free area
Manages large air flows
Cleanable
Can be used with the ALS commissioning box
Standard colour White RAL 9003
5 alternative standard colours
Other colours upon request
Technical description
Design
The GRC is supplied with push-in connection and without
screw holes.
Materials and surface treatment
The raster grille is made of aluminium with an outer frame
of cold-rolled sheet steel, these parts are finished. The
duct connection sleeve is made of zinc plated sheet steel.
• Standard colour:
- White semi-gloss, lustre 40, RAL 9003/NCS S 0500-N
• Alternative standard colours:
- Silver gloss, lustre 80, RAL 9006
- Grey aluminium gloss, lustre 80, RAL 9007
- White semi-gloss, lustre 40, RAL 9010
- Black semi-gloss, lustre 35, RAL 9005
- Grey semi-gloss, lustre 30, RAL 7037
• Non-painted finish and other colours available on request.
Accessories
Commissioning box:
ALS. Manufactured in galvanized sheet steel. The commissioning box includes a removable damper, fixed measurement tapping and sound absorbent insulation covered by
a reinforced surface layer, to Fire Resistance Class B-s1,d0
according to EN ISO 11925-2.
Project planning
The grille can be installed in a walls or ceilings. Stocked
sizes according to table under the section Ordering key,
see Standard range.
Free area
To obtain the free area, the inner area of the grille is multiplied by the factor f = 0.91.
Example:
Grille: GRL GRC 200
Inner area of grille (ØB-measurement):
A = (ØB2 x 3,14) / 4
(0,182 x 3,14) / 4 = 0,0254 m2
Free area of grille:
0,91 x 0,0254 = 0,023 m2