Soffit Vents Exterior,Vent Cover, No Electricity Loss, for Kitchen, Canteen Ventilation, Chimney Flue Cowl(300mm)

▲Using natural wind and air thermal convection caused by the temperature difference between indoor and outdoor, it drives the turbines to rotate and discharges the air that does not circulate in the room. ▲The roof wind smoke exhauster is made of 304 stainless steel, galvanized support frame and high-quality ball bearings, zero energy consumption, flexible rotation, firmness and strong pressure resistance ▲The variable-angle neck tube design allows the fan to be installed freely on a slope of 0-22.5 degrees, flat or inclined. ▲The curved fan blades can ensure that rainwater will never intrude under working conditions. High exhaust efficiency and light operation Wall mount air vent-- the specially designed air vent prevents rain and excessive wind from entering the ventilation system.