Wind Driven Cyclone/Roof Ventilators 300mm

Non-Electric Power: These devices operate entirely on natural wind energy and do not require electricity.Rotation Principle: As the wind catches the curved vanes, the turbine head rotates. This spinning motion creates a low-pressure zone inside the turbine, which "pulls" hot air, fumes, and moisture up and out of the building.Continuous Operation: It can work automatically and silently whenever there is even a light breeze.