Stainless Steel Roof Wind Turbine Cap Vent 8 Inch 12 Inch Round Rotating Roof Vents - Easy to Install, Unpowered Rotation - Exhaust Cap Roof Flue Vent for Effective Ventilation

specifications：Product DetailsName: Roof VentilatorZero consumption:Using natural wind and air-heat convection caused by the temperature difference between indoor and outdoor to drive the turbine to rotate,In this way, centrifugal force and negative pressure are used to discharge the stale air in the room.Material: 304 stainless steelSize: Diameter100mm/4in , 150mm/6in , 200mm/8in , 300mm/12in , 350mm/13.8in , 400mm/15.8in , 450mm/17.8in , 500mm/19.6in , 600mm/23.6in The mounting nozzle is slightly smaller than the vent pipe for easy installation. Note:The product is measured manually and may have an error of 2-3cm;due to differences in light and screen, the color of the item may be slightly different from the picture.

• Crafted from durable 304 stainless steel with a galvanized support frame and premium ball bearings for long-lasting quality.
• Features: Boasting zero energy consumption and noise levels, as well as rain and rust resistance, high hardness, and exceptional corrosion resistance for a reliable and durable performance.
• Working principle: Harnessing natural wind and thermal convection to drive the turbine and efficiently exhaust stale indoor air.
• Installation: Comes with two types of installation accessories - clamps for smaller sizes to minimize gaps and 90° fixed feet for larger sizes for secure mounting.
• Application: Ideal for ventilation ducts, chimneys, farms, factory roofs, warehouses, and more.