The plenum boxes for Grilles constitute an easy and cost-effective way to connect the grilles back to ductwork. Available with Side or Top Entry connections to customer-specific diameter/shape, these can be fitted with Spigotflap dampers GPB, cord- or quadrant-operated, as well as 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007 to avoid noise generation.
An internal baffle plate can be fitted to the plenum box to help evenly distribute the airflow over the whole surfaceof the grille if used for Supply air.
GPB: Plenum box for Grilles
NRG: Neck Reducer
SE:Side Entry spigot
TE:Top Entry spigot
FO:Flat Oval connection
FDC:Cord-operated Flap damper (optional)
FDQ:Quadrant-operated Flap damper (optional)
LINED:6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
BFL:Internal perforated baffle plate (optional)
BLACK:Plenum painted black to prevent through vision (optional)
PBG / NRG : Galvanised sheet steel
Width: Extract Grille width
Height: SE – Spigot diameter or height + 100mm as standard
TE – as specified by customer (200mm minimum recommended)