Vents Whirlybird, Ventilating Fan, Roof Ventilator, Cap Vent Round, 304 Stainless Steel Round Exhaust Grille Louvered Vent, DIY Easy Vent Hookup Kit, for Flats, Apartment, Home Decor(4.3inch

Dome Ventilator, 304 Stainless Steel Air Vent, DIY Easy Vent Hookup Kit, for Flats, Apartment, Home DecorProduct Name: VentilatorMaterial: 304 Stainless SteelProduct Color: SilverProduct Specifications：110mm---200mmProduct features: no energy power, high speed, high precision, high density, rain and smoke backflow preventionProduct Principle: The use of natural wind and indoor temperature difference caused by thermal convection air to promote the rotation of the so as to use the centrifugal force and the negative pressure effect will be indoor not fresh air out.

• Excellent material: the hood is made of 304 stainless steel, the finished product is strong and not deformed, the bearing rotates flexibly and smoothly, the bracket is firmly fixed and durable.
• Product design: non-powered hood, this chimney hood ring is specially designed to be very effective in wind and increasing ventilation, the hood rotates by air thermal convection to expel stuffy indoor air and keep the flue from deposition, designed to release the roof air in minutes, from rain and .
• Easy Installation: All air hoods are shipped as a whole, no assembly required, comes with mounting accessories, no assembly required for vents, just and install to the desired location.
• Hood size:4.3inch(110mm), 6.3inch(160mm), 7.9inch(200mm),
• Wide range of applications: farms, machinery factories, roof chimneys, industrial plants, production workshops, kitchens canteens farming, workshop ventilation, tile houses, flue smoke exhaust and other areas