FENGZEQUAN Non Power Roof Ventilator Outside Dryer Vent Covers,Chimney Cap Rotation Air Vent Outlet, For Chimney/Shed Roof Industrial Rotating Roofing Ventilator, Wind Driven (Size : 100mm/3.94in)

Perfect Protection: The thickened stainless steel rotating chimney cap spinner fits most standard chimney pots, preventing wind blowing and increasing ventilation. Protect your chimney from rain and moisture, especially suitable for chimneys that are not used frequently. Multipurpose: The swivel hood is suitable for ventilation ducts, chimneys and exhaust vents. The hood provides maximum protection without affecting the performance of the chimney. Protect your chimney from rain and moisture, especially suitable for chimneys that are not used frequently. Stainless steel construction with thickened mounting feet; complete mounting kit included Design: The hat is designed to rotate with the action of the wind, so that the more the wind blows, the more the blades rotate, and the more powerful the air intake is from the inside to the outside. Prevent exhaust gas backflow, promote inhalation, improve combustion, and protect the chimney from external influences such as rain and snow. It can prevent strong winds from invading pipes, chimneys, stoves, etc., thereby avoiding the adverse effects of chimneys. SIZE: Bottom diameter fits most standard chimneys. The bottom diameter is 100mm, 110mm, 150mm, 160mm, 200mm, 300mm, 350mm, 400mm, 450mm, 500mm. Suitable for standard chimneys, the stainless steel structure is sturdy and supports customization. Rotating Chimney Cap: Choose size based on pipe outer diameter. The rotor ball spins with minimal wind force, not only standing on the roof but also providing excellent performance. Ventilation ducts, chimneys and swirls of exhaust gases…