Stainless Steel Round Vent Grille Hood, External Roof Round Air Turbines Ventilator Cover, Chimney Hood Rings Air Vent Attic Ventilator Wind Turbines, for Houses Factory

? Roof Turbines solves the air backfilling caused by high winds and low air pressure, and avoids filling the home with oil smoke and odor. When the wind speed is 200 km/h and the rainfall is 200mm/h, the ventilator is still running intact without water leakage. ? Features : - No energy power, high speed, high precision, high density. - Rainproof, high hardness and long service life. - Ensure Air Circulation: Provides maximum protection without hindering the performance of the chimney. - Enough strong to withstand 200km/h wind speed and 100KG load without damage and deformation. ? Material: 304 stainless steel ? packing list: 1 x Roof Ventilator ? Size - The package includes: 110mm (4.3 inches) ventilation cap×1, clamp×1 160mm (6.3 inches) ventilation cap×1, clamp×1 200mm (7.9 inches) ventilation cap×1, clamp×1 250mm (9.8 inches) ventilation cap×1, clamp×1 300mm (11.8 inches) ventilation cap×1, fixed foot×3 350mm (13.8 inches) ventilation cap×1, fixed foot×4 400mm (15.7 inches) ventilation cap×1, fixed foot×4 ? Application: It is is used as exhausted outlet and ventilation on the exterior walls of washrooms, kitchens, warehouses, houses,apartments, condominiums, gymnasiums...ect ? Notice : Please wear gloves when installing!

• ? High-grade stainless steel dual ball bearings with integrated molded shields to protects the bearings, inner and outer brackets; permanently lubricated ball bearings. The fan can be installed on a slope of 0-22.5 degrees, flat or inclined.
• ? The roof ventilator smoke extractor is made of high-quality 304 stainless steel, which is not easily deformed, has a smooth surface and has no sharp angles. Curved fan blades provide less wind resistance and smooth rotation
• ? Strong enough to withstand 200 km/h wind speed and 100 kg load without deformation or damage. High ventilation efficiency, light , preventings rainwater intrusion
• ? Weather Resistants. Provides the performance of standard roof ventilation systems, releasing trapped air in your roof space in just minutes
• It is recommended to clean the vents regularly to maintain ventilation effectiveness. Avoid the vents being blocked by dust, debris, etc., affecting ventilation effectiveness.