WQPMNYG 110mm, 160mm Chimney Spinner Cowl, 300mm Stainless Steel Rotating Chimney Cowl Cap, Non-Rusting, Maintenance-Free, Smooth, Easy to Install, Pipe Rain Cover Protector Cap Ending

【Wind Rotation】Use the wind tomake it rotate, forming a vacuum/vortex in the channel it is installed in, thus achieving the effect of rapid discharge of indoor air, without any power loss and no noise 【Exhaust Ventilation】It can ensure the air exchange in the room, accelerate the air circulation, act as a guide for the smoke, preventthe smoke from staying back in the room from the ventilation ducts, improve the ventilation of the chimney and expel the non-fresh air from the room 【304 stainless steel】Made of 304 stainless steel, can meet all the needs of the wind exhaust smoke, strong and durable, strong pressure resistance, can withstand 200 km/h wind speed without deformation, 100 kg load pressure without damage, can be used for a long time 【Weatherproof design】Surface consists of curved blade arrangement, high temperature resistance, cold resistance, can resist the adverse effects of bad weather, outdoor use does not rust, no deformation, preventthe wind and rain backflow, preventforeign objects from entering 【Widely used】 Suitable for 110 to 400mm chimney ducts, can be used in sunrooms, factories, canteens, warehouses and humid environments to achieve rapid ventilation and heat dissipation