• Material: UV resistant white plastic (prevents ageing caused by exposure to sunlight). • Nominal diameter 100 mm. • Motor protected against thermal overload, with shaft turning in ball bearings; 2 operating speeds controlled electronically from pcb. • Air flow between 65 m3/h and 95 m3/h. • Version with advanced timer: the appliance is equipped with a pcb allowing delayed switch-on and/or switch-off at the minimum or maximum speed. The length of the delay preceding switch-on and switch-off can be set during installation, as also can the operating speed of the fan. In addition, the appliance can run automatic switch-on cycles. • Equipped with non-return damper preventing unwanted backdraught when the fan is off.