• Pickled and phosphated steel housing/roof mounting plate with polyester powder-coated finish, resistant to the aggressive action of atmospheric agents • Nominal diameter 125 mm • 3 speed AC motor with thermal overload cutout and shaft turning in ball bearings, coupled to backward curved impeller • Minimum air flow 220 m3/h Maximum air flow 380 m3/h • Operation controllable by remote sensors monitoring: Temperature, Relative Humidity, Smoke and Presence • Zinc-coated steel brackets for wall mounting • Vortice speed controller included.