Specifications

ventilation fan
1)unpowered,energy saving
2)sensetive,operate all day
3)stainless steel.durable
4)low noise,large air output

Unpowered Roof Fan/Ventilation Fan

 

1.Without any energy, environment friendly, benefit from an investment for life.

2. Efficient ventilation, moisture capacity

3. Special blade design ensures to operate sensitively.   

4. Imported bearings, low noise, durable.

5. The unique angle-diameter, easy to install.

 

 

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.