Switch operated These extractor fans are operated using the light switch for your bathroom. A simple flick of the switch and excess humidity from a shower or long bath can be extracted until you turn the light back off. For extended extractor you may want to consider one with a timer or humidistat. Interchangeable Fascia This package comes supplied with an interchangeable fascia in a square or rounded design, so you can ensure that your extractor fan not only performs to the highest of standard but also looks the part as well. Recessed Design Recessed fans can be installed through a wall, window or alternatively the ceiling giving you that extra bit of flexibility. Axial Axial type fans cause gas to flow through in an axial direction which is parallel to the shaft where the blades rotate, making the flow axial at exit and entry. Axial fans are designed to create a pressure difference and force which produces a flow through the fan. IPX4 Rating This product has a rating of IPX4 which