turbine wind cap for chimney,roof turbine ventilator , roof smoke ventilator, roof mount ventilator, roof ventilator for factory, roof wind ventilator, wind driven roof ventilator, roof turbo ventilator, industrial roof ventilation, roof centrifugal ventilator, powerless roof ventilator, automatic roof ventilator, roof ridge ventilator, roof ventilation.roof exhaust fans, city roof fan wind ventilator, roof fan fan part ventilation fan, powerless roof ventilator,garage  ventilation operate use the slight energy of the wind, so it save power cost. 

It work without the electricity power,they can change our air condition indoor,leave us a comfortable environments.
The turbine alway rotate in the same direction no matter of the wind strength or its direction.
It is to be mounted on gravitation based ventilation chimney duct ending.Roof turbine ventilator can exhaust the hot air, waste gas, dust and other harmful gas; meanwhile Beautify our living and surrounding.

It is widely used in home and factory.

Material: steel, aluminium, stainless steel available

You can let me know your warehouse area and temperature and so on and then we can help you to choose the right item and quantity