roof vent fan, attic vents, Wind Turbines Air Vents, Sphere Ventilation Grill Cover Hooded, Air Diffusers, Or Ventilation And Exhaust (Color : Silver,

roof vent fan, attic vents, Wind Turbines Air Vents, Sphere Ventilation Grill Cover Hooded, Air Diffusers, Or Ventilation And Exhaust (Color : Silver,

Product material: made of stainless steel, high operation, high precision, zero noise, large force wind pressure resistance, strength enough to withstand 200 km / h wind speeds Unpowered wind cap: Unpowered stainless steel wind ball, sturdy and durable - rain and insects - zero energy consumption and no noise, 4 core for you to drive away indoor air pollution, high efficiency exhaust function, effectively exclude the dry heat of the plant, odour, dust, the blades are tightly arranged to increase the wind pressure, strong and does not leak rain! Simple installation: all the hoods are shipped as a whole, no need to assemble, with installation accessories, easy to install, just take it out and fix it. Product design: blade tight blade tight arrangement, scientific design can completely prevent rainwater into the seamless welding technology, wind cap foot ring stitching for seamless spot welding technology fine workmanship, excellence, cooling exhaust heat balloon by generating air convection, reduce indoor temperature, maintain fresh air, circulation of air exchange The turbine roof vent effectively increases the air circulation and removes stagnant air, improving overall indoor air quality and freshness. This design ensures efficient and effective ventilation for optimal comfort. Dome Ventilator, Stainless Steel Exhaust Cap, for Flats, Apartment, Home DecorProduct Name: Unpowered wind capMaterial: Thickened 304 stainless steelProduct Colour: Stainless steel colourProduct features: zero energy consumption, zero noise, no rain leakageProduct features: no energy power, high speed, high precision, high density, rain and smoke backflow preventionInstallation: All wind caps are shipped as a whole, no assembly required, with mounting accessories, easy to install, just take it out and fix it.Working Principle: Using natural wind and air thermal convection caused by indoor and outdoor temperature difference to push the turbine to rotate, so as to use centrifugal force and negative pressure effect to discharge the indoor unfresh air.