Rotating Roof Vents Roof Wind Turbines Cap Vent Round, 4 in 8 in 10 in Stainless Steel Exhaust Cap Roof Flue Vent, No Electricity Loss, for Kitchen, Canteen Ventilation, Chimney Flue Cowl

Round Roof Turbines Vents, House Chimney Vents, Wind Turbines Rain Cap Vents 100-400mm Diameter Stainless Steel Roof VentsFeatures: zero consumption, zero noise, rainproof, weatherproof and rustproof, high speed, high hardness, long service life, prevents pipes from being clogged by nests and debrisName: house chimney vent capMaterial: 304 stainless steel (galvanized inside)Function: ventilation, exhaust, ventilation, heat dissipationsize:110 mm (4.3 inches)150 mm (5.9 inches)200 mm (7.9 in)250mm (9.8")300mm (11.8")350mm (13.8")400mm (15.7 inches)Package:Vent hood x 1Accessories: (110-250mm: 1 clamp, 300mm: 3 fixed feet, 350-400mm: 4 fixed feet)If you have any questions about the product, please feel free to contact us, our professional customer service team will answer your doubts

• ▲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
• ▲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 curved fan blades can ensure that rainwater will never intrude under working conditions. High exhaust efficiency and light operation
• ▲The variable-angle neck tube design allows the fan to be installed freely on a slope of 0-22.5 degrees, flat or inclined.
• ▲Applicable to chimneys, farms, factory roofs, ventilation ducts, houses, warehouses, etc. easy to install