Envirograf Intumescent Fan Cover
A cover for fan units mounted on either walls or windows. The cover fits around the fan unit and is affixed to the wall or window. The unit is fronted with an MG Grille (Product 35), fitted with intumescent strips to expand in a fire and seal the openings, thus preventing fire and smoke from spreading.
All sizes in mm
Multigraf Intumescent material chemical constitutionMineral Wool Fibre 20-70% by weightExfoliating Graphite 20-60% by weightOrganic Binder (including adhesive coating) 5.0-30% by weight
FIRE TEST PERFORMANCE
Contains a front MG grille, tested to BS476 Parts 20 & 22 (1987), achieving up to 73 minutes integrity.
Tested at VNE to European Stan
1. The wall mounted unit simply fits over the fan unit, offering one hour fire protection. This can be fixed to brick, block or concrete using rawl plugs & steel screws (32mm No8 or No10 screws or small rawl bolts). For plasterboard or lath & plaster walls before the plasterboard is applied metal or timber fixings can be allowed for while building, otherwise if fixing to existing walls or ceilings use steel butterfly toggle bolts
2. The glass mounted unit consists of two plates, X and Y, that are fitted to either side of the glass. The fan unit is then fixed as usual. The grille unit Z is attached to the plate X with self tapping screw
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