Suitable for a wide range of applications including bathrooms, toilets, shower rooms and utility rooms. This is a centrifugal in-line extractor fan that continues to run for a pre-set time after switching off, adjustable from 1-20 minutes. This model requires three connections: permanent live, switched live, and neutral. It is designed to be connected to an inlet and outlet with flexible ducting (not supplied). The built-in over-run timer continues to operate the fan for a pre-set time after the light switch is turned off. Features a 100mm exhaust and can perform up to a 10m run. Includes a built-in single spring back draught shutter. Performance: 31 litres per second, 110m3 per hour. Noise level: 45dB(A). Power Consumption: 20 Watt. Weight: 1.10010668738 pounds.