Axial Extractor Fan with Automatic Backdraught Shutter, designed for operation in bathroom or toilet locations. This timer model operates in conjunction with the room light switch. When the light is switched on, the fan activates, and upon switching the light off, the fan continues to run for a pre-set, adjustable time. To ensure correct operation, this fan requires a permanent live, switched live, and neutral connection (3 wires excluding earth) at the fan position. The timer function is dependent on these three wires being connected. It features an automatic slow-closing backdraught shutter, an extract rate of 23 litres per second (85 cubic metres per hour), and operates on a Mains 230/240 volt supply. Dimensions are 165mm x 165mm x 60mm deep, with a 55mm rear projection and a 98mm diameter exhaust.