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Pressed Steel Return Air Grilles

These pressed Steel supply grilles are recommended for use as finishing grilles in doors and partitions where intumescent fire dampers are installed. Constructed from mild steel with a white finish. Screws included. Sizes are duct opening/nominal, not overall - taken as a whole the external dimensions of the cover are 45mm larger than the dimensions listed below. For example, a 300x300 grille has an aperture of approx. 300x300mm and an overall size of 345x345mm. 


 
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These pressed Steel supply grilles are recommended for use as finishing grilles in doors and partitions where intumescent fire dampers are installed. Constructed from mild steel with a white finish. Screws included. Sizes are duct opening/nominal, not overall - taken as a whole the external dimensions of the cover are 45mm larger than the dimensions listed below. For example, a 300x300 grille has an aperture of approx. 300x300mm and an overall size of 345x345mm.