Steel construction air relief grilles, supplied as a kit to convert any door into an air relief door.
45mm & 50mm air relief grilles are installed using a fix through clamp method
35mm air relief grilles are fixed into the surface of the door leaf (2 pieces, one installed on either side)
Suitable for door leaf depths 35, 45 and 50mm wide, they can be mounted into wood, aluminium or steel doors. No fixings are provided with the 35mm air relief grilles.
