Natural Wind On Top whirligig 300/400mm type ventilation exhaust fans for home ventilation

 Selling Point:

Our Roof turbine ventilators are made of stainless steel. All the parts of the turbine ventilators are finished by the professional molding tools, they are assembled after checking by the professional equipments. It works without the electricity power, they can change our air condition indoors, leave us a comfortable environment. Also, when used in a workshop or a storeroom, they can advance the working environment, and this improves the workers' efficiency. 

Raw materials:

Ventilations are made of the stainless steel 
Advanced totally enclosed bearings

Operating theory:

Arc blades can gain the optimal exhaust effect which are calculated scientificly, ensuring the rainwater can't enter during the work 
The central axis is with fine steps,and the blades can never be deformed in high-speed operation, thus greatly enhancing the service life 
The design of variable angle neck tube can make the ventilation installed in the slope of 0 to 22.5 angle, and the installation is very simple, generally only need 30 minutes 
Turbine Blades can normally operate for 15 years

Applications:

power plants, chemical plants, pharmaceutical factories, food processing plants, metallurgy, rubber, warehouses, and advanced civil buildings

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100mm 150mm 160mm 200mm 300mm 360 mm 400 mm 450mm 500mm 600mm 680mm 800mm 900mm 1000mm 1100mm 1200mm 14’’  16’’  18’’  20’’  22’’  24’’