air driven turbine roof ventilation fan
1.low noise,long life
2.durable, stainless steel blade

Tianhui air driven turbine roof ventilation  fan 

1.Natural wind drives, operates all day.

2.High sensitivity, slight wind or the range of temperature can drive the tubine blader to move.

3.Rotary stablely, quietly to improve the inner environment of room.

4.Using complete senior axis bearing, no lubrication and solid.

5.Corrosion resistance, acid and alkali proof and long service life.