Easy to Install The fan can be installed on a slope of 0-22.5 degrees, flat or inclined. High exhaust efficiency Unpowered Chimney Cap The rotating chimney cap uses natural wind and air heat convection caused by the temperature difference between indoor and outdoor to drive the turbines to rotate and discharge indoor dirty air. Versatile Application: Perfect for a wide range including chimneys, farms, factory roofs, commercial spaces, ventilation ducts, residential buildings, warehouses, and more. Enhance air circulation and maintain optimal indoor conditions effortlessly. Use Suitable for use on chimneys, farms, factory roofs, ventilation ducts, residential flues, vent pipe/hose warehouses, bathroom vents and extractors, air conditioning units, kitchen fans and vents. Suitable for chimneys and ventilation systems., Manufacturer: FGJtguE