• Material: BLACK GOLD UV resistant plastic (prevents ageing caused by exposure to sunlight), with colouring obtained by way of treatment using nano technologies. • 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. • Equipped with non-return damper preventing unwanted backdraught when the fan is off.