Astroflame Air Transfer Louvered Face Plate 250 x 250mm

A durable ventilation grille which is easily mounted in solid timber fire doors & solid block walls, and can provide in excess of 1/2 or 1 hour fire protection. Astroflame Fire Grille comprises of a intumescent core within a galvanized steel frame with vermin proof 6mm steel mesh fitted to both faces. Suitable for fitting up to 1,000mm (1m) from floor level. The top of the grille should not be higher than 1000mm from the floor. The design allows a free area of 80% approximately. See our Free Area table below for guidance. All square and rectangular grilles are available to suit 30 minute or 60 minute on previously fire rated applications. Line the aperture with Astro INTU Mastic and mechanically fix the Grille in place with steel screws in each corner and at 150mm centres both sides.