20" Wind Driven Turbine Ventilators - Roof Ventilators

The un-powered attic ventilation fan uses the natural wind speed in nature to drive the turbine of the fan to rotate. The attic turbine fan does not need electricity, no noise, and can run for a long time. According to the natural laws of the air and the principle of air flow, it is rationally arranged on the top of the roof, which can quickly exhaust indoor hot and dirty gases, and improve the indoor environment.

• Galvanized bearings, the turbine blades can withstand the wind speed of 200 km/h under high-speed operation, and the load of 100KG will never be deformed.
• Thicker high-quality stainless steel, higher density and longer life
•  The blades are arranged closely, and the air volume is strong and does not leak rain
•  No rust and oxidation resistance in humid environment
• There is no need for electricity, automatic exhaust all the time, and it will also reduce the fire and other unnecessary troubles caused by short circuit or voltage overload.