7.9 Inch Roof Turbine Ventilator, Stainless Steel Roof Vent Hood for Ducts, Chimneys and Roofs, Waterproof Vent Cap (Size : 100mm)

Name "Stainless steel unpowered hoodMaterial "201 stainless steelSpecifications: 100mm, 150mm, 200mm, 300mmFunctions: "High precision, high speed, rain protection, efficient ventilation

• Application: Suitable for chimneys, farms, factory roofs, residential buildings, ventilation ducts, warehouses, etc.
• Rotating chimney cap: Made of thickened 201 stainless steel, waterproof and durable, with long service life. Easy to clean. Various sizes
• Practical: Very effective in preventing downdrafts and increasing ventilation. The chimney cap's ring prevents wind from flowing down the chimney, completing the solution for preventing downdrafts
• Silent and rainproof: The curved fan blades have encrypted blades to ensure that rainwater will not invade during working conditions. High exhaust efficiency allows for easy operation. Protect your chimney from rain and moisture
• Operating principle: Utilizes natural wind and air thermal convection caused by indoor and outdoor temperature differences to drive the turbine to rotate and discharge indoor air.