These non-power ventilation exhaust fans are amounted on the building roofs when it is not available to fix wall-mounted fans.
These fans run without motor power which are widely used in factories, warehouses, greenhouses, mine tunnel where ventilation and exhaust is required.
Features of non-power working roof exhaust fans
- Environmental-friendly, no electricity power needed, no noise
- Use fully enclosed ball and self-lubricating bearing which will rotate at wind speed even less than 3.2km/h
- Dust proof and easy to clean
- Zero maintenance
- Blades ware made of stainless steel and long service life
|Model||Blades Pieces||Height (mm)||Turbine Diameter (mm)||Vent Diameter (mm)|
|RF 300||24 blades||330||420||300|
|RF 400||26 blades||390||500||400|
|RF 500||32 blades||480||600||500|
|RF 600||32 blades||600||710||600|
|RF 800||42 blades||660||900||800|