HY roof mount ventilator/unpowered roof ventilator

roof mount ventilator 

unpowered roof ventilator
1)without energy consumption
2)durable, low noise
3)high corrosion resistance

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

2. Efficient ventilation, moisture capacity

3. Special blade design ensure 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, solid.

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