Louvered Vent, Roof Ventilator, Galvanized Turbines, Wind Turbines Air Vents, Internally Braced Wind Turbine, 304 Stainless Steel Air Round Hood, DIY Easy Vent Hookup Kit, for Ventilation an

Internally Braced Wind Turbine, Louvered Grille Cover, for Kitchen Bedroom Bathroom Office etc Product Name: Turbine Ventilator Material: Thickened 304 stainless steel Product Color: Silver Product Specifications：110mm---400mm Product features: no energy power, high speed, high precision, high density, rain and smoke backflow prevention Product Principle: The use of natural wind and indoor temperature difference caused by thermal convection air to promote the rotation of the turbine so as to use the centrifugal force and the negative pressure effect will be indoor not fresh air out.

• High quality stainless steel material: the roof turbine is made of 304 thickened stainless steel material, high density, not easy to deform, long service life.
• Keep the room well ventilated: the rotating turbine can also be installed on roofs, sunrooms and other places with poor air circulation. Equipped with a ball bearing base, it requires only a small amount of wind to make it rotate automatically and silently. Keeps indoor air fresh and ventilated 24/7 without the need for electricity.
• Easy to install: all air caps are shipped as a unit, no assembly required, comes with mounting accessories, no assembly required for the vents, just remove and install to the desired location.
• Scope of application:Can be used in greenhouses, residential buildings, covered terraces, industrial warehouses, damp houses and closed or seldom used rooms or spaces to promote air circulation
• Hood Size:4.3inch(110mm), 6.3inch(160mm), 7.9inch(200mm), 9.8inch(250mm), 11.8inch(300mm), 15.7inch(400mm)