All feature an automatic air operated back draught shutter and the CF20 range are supplied with a brown 100mm external outlet grille for wall or soffit fixing. All models come complete with a universal mounting kit. The clip off front cover and removable fan blade on all models allow easy cleaning and maintenance. All also have a neon indicator (except DX180/T). DX200 and CF20 models are IPX5 rated where-as the DX180 models are IPX4. All are BEAB approved. They are all suitable for 220-240Vac 50Hz mains operation. Motors are totally enclosed and maintenance free for life, with self aligning bearings and a thermal cut-out. All electronics and wiring terminals are fully protected.