Complying with the new Technical Building Code, for ventilating homes and small work spaces, centrifugal backward curved impeller in galvanised sheet steel protected by black polyester paint, an aluminium cover, galvanized sheet steel bird-proof guard, duct connection flange seal, an external rotor EC motor, thermal protection, and IP55 on-off switch, which can be moved away from the fan.CTBH ECOWATT range fans start up automatically when temperature conditions do not permit sufficient natural air circulation.
