The SF90B is a high-performance centrifugal extractor fan designed for installation in bathrooms and WCs, especially those with longer duct lengths. This surface-mounted fan is a direct replacement for Greenwood models. It is for simple switching on/off via a separate switch (not supplied), requiring a two-wire connection (live and neutral). It does not feature a run-on timer, but includes a pull-cord switch for fan control. The fan operates on Mains 230/240V AC 50Hz. It features an anti-backdraught shutter and a backplate that can be fully installed before the fan and motor assembly are fixed, allowing for easy installation. It boasts a modern, stylish front facia design and is IP44 rated. The integral filter is easily removed for washing. Performance includes an extract rate of 21 litres per second (75m³/h) and a sound level of 41dB(A) @ 3m. Power consumption is 20 watts. Dimensions are 186mm wide x 142mm high x 142mm deep.