• Material: self-extinguishing plastic resin (self-extinguishing capability V0) • Nominal diameter 315 mm. • 2 speed EC brushless with thermal overload cutout and shaft turning in ball bearings, coupled to mixed flow axial-centrifugal impeller. • Minimum air flow 1400 m3/h Maximum air flow: 1900 m3/h • The electronic motor control circuitry incorporates an electronic timer function designed to shut off the motor automatically after a set interval, selectable during installation in the range 3’-20’ (default setting 3’). • Speed controller devices operating with 0-10 V signal.