Aluminum Alloy turbine roof exhaust fan

Ventilator.Wind Turbine Ventilators.Roof Turbine Air Ventilator.Rooftop Ventilator,Turbine Ventilator.Ventilation.Wind-Driv 
Our Roof turbine ventilators are made of stainless steel, and import the UBC bearing from USA. 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. 
Experienced Staff 
Green Product 
Competive Price 
Quality Approvals 
Reputation and Service 

No-power Roof Turbine Ventilator is to make use of the air free convection that natural wind power and the interior outside temperature difference bring about, the effect driving a turbine to rotate making use of centrifugal force and negative pressure thereby discharge the interior stale hot-air 
It makes the fresh air flow in, thus the purpose of cleaning air can be reached 
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 
Features: 
High efficient venting function 
Unique variable angle tube neck 
Special diversion vane of beveled fanner 
Easy to install 
Excellent energy-saving effect 
Applications: power plants, chemical plants, pharmaceutical factories, food processing plants, metallurgy, rubber, warehouses, and advanced civil buildings

Assembled as carton packing,and also spare parts for your choose.

Delivery time is about 15 days and warranty is 12 months for  industrial roof exhaust fan.