DX100PIRS 4\" 100mm extractor fan with integral PIR proximity sensor to activate the fan when movement is detected in the room. A comprehensive range of stylish, compact and easy to install 100mm (4\") single speed extractor fans. Suitable for a wide range of applications including bathrooms, shower rooms and toilets, including zones 1 and 2. All DX100 extractor fans (except the CP clamp packed model) come complete with a universal mounting kit comprising of a wall tube, gasket x2, outer grille and skirt moulding for window mounting in single glazing up to 6mm. Also suitable for wall or ceiling mounting. DX100 models also include an outer grille and ducting.