• Material: plastic resin, colour black, resistant to ageing. • 5 ports for connection to extractor ducts, nominal diameter 80 mm; • 1 port for connection to exhaust duct, nominal diameter 125 mm • 3 speed EC motor with shaft turning in ball bearings, coupled to a centrifugal impeller; facility of selecting 5 different configurations (min/max) by way of a dip switch mounted on the appliance. • Equipped as standard with 3 x Ø80 mm spigot and 4 plugs (regulators not available) and with a 30 minute maximum speed timer (after 30 minutes operation at maximum speed, the fan reverts automatically to operation at the minimum setting).