STAINLESS STEEL ROTATING SPINNING VENTILATION AMNEY COWL Welcome to Stainless Steel Rotating amney Hoods Stainless Steel amney Cap, Shower amney Cap, Galvanized Cooker Hood Cover, Stainless Steel a Exhaust, Swivel amney Cap, amney Duct amney Cap The roof ventilation fan makes no noise when rotating. The distance between the downwardly protruding slats is small a to prevent rainwater from entering the ventilation system. The hat is designed to rotate with 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. Name: Unpowered Air Cap (amney Hood) arial: 304 stainless steel (galvanized raer inside) Praiple: Use natural wind and indoor temperaa difference to generate air convection to rotate the turbine Use centrifugal force and neaive pressure to expel old air from the room feaa: -- a of sturdy stainless steel. -- Suitable for use with solid fuels. -- Fits most standard amney bases --Installation is ay - just a screwa is needed. Precautions: If you have anyquestions, plae feel free to at us and we will respond to you within 24 hours. Sae our sizes and picas are taken manually, due to monitor and light raons, the sizes are maured manually, so there may be errors. Plae refer to the aual item received, plae understand.Producto 100% original