• Pickled and phosphated steel housing with polyester powder-coated finish, resistant to the aggressive action of atmospheric agents. • Nominal diameter 125 mm. • 3 speeds AC motor with thermal overload cutout and shaft turning in ball bearings, coupled to backward curved impellers. • Minimum air flow 280 m3/h Maximum air flow 450 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.