Intumescent air transfer grilles allow movement of air when fitted into doors, walls and ductwork in a building. Day-to-day this enables efficient ventilation but during a fire will seal shut, stopping the fire spreading further. Grilles are available in a range of sizes and offer up to 60 minutes integrity in accordance with BS 476-22.
A range of matching steel vent covers for grilles in powder-coated finishes are available.