Roof Turbine Ventilator, 304 Stainless Steel Chimney Cowl, Wind Rotating Turbine Cap Vent, Round Rotating Roof Exhaust Heat Dissipation Vents, Unpowered Rotation, Easy To Install(110Mm/4.3In)

• HighQuality Construction: Crafted from premium 304 thick stainless steel with a galvanized support frame and topoftheline ball bearings, ensuring durability and longevity.
• Functional: Rotate the cover of the chimney cover cover for ventilation pipes, chimneys and air extraction. Suitable for factories, farms, production workshops, kitchens, roofs, home, farms.
• Working principle: Using natural wind and air thermal convection caused by the difference between indoor and outdoor temperature, the turbine is driven to rotate, and the stale indoor air is discharged.
• No Noise and Rainproof: The roof vent turbine makes no noise during rotation.The encrypted blade clearance is small enough to prevent rainwater from entering the ventilation .It also deters birds and rodents.
• Installation: The hood is equipped with two types of installation accessories, a clamp and a 90 fixed foot. Small sizes can be installed with clamps to prevent gaps, and large sizes can be fixed with 90 fixed feet.

Rooftop turbine ventilator does not need to be connected to electricity,using air convection to let the wind blades rotate and exhaust the indoor air.This looks like a heavy ventilator,only need to be in the breeze can work,stainless steel material design,not easy to rust,can resist the general bad weather,so that it can work normally!Features:1 weather-resistant curved blade2. Zero energy consumption cover, environmentally friendly and durable3. High speed, low noise, prevents the pipe from being clogged by nests and debrisSpec:Item Type: Roof VentilatorMaterial: 304 Stainless Steel (galvanized inside)Function: ventilation, exhaust, ventilation, heat dissipationSize: Diameter110mm/4.3in , 160mm/6.3in , 200mm/7.9in , 250mm/9.8in , 300mm/11.8in , 400mm/15.7inPackageList:1 x Roof VentilatorNote: The product is hand-measured, please allow an error of 1-3 cm due to factors such as shooting angle, light, display parameters, etc., the actual color may be different from the photo, and the actual product shall prevail.