The roof ventilation fan applies the they of convection between natural wind air to accelerate transfm any parallel airflow into vertical so as to improve the indo ventilation. The hot air rises cold air falls which makes the fan rotate. So the indo heat stink dust are exhausted effectively. As a result it improves the wking environment protects wkers health enhances the wking efficiency.
Its significant characteristics： no energy cost free maintenance strong ventilation high sensitivity no noise stable durable dehumidification anti-sweat rain-proof.

Model No.：300
Amount of Blades：20pcs
Total Height：350400mm
Turbine Diameter：430mm
Ventilation Diameter：300mm

产品名称：Sell Turbine Roof Ventilat
产品手机链接：http://m.vooec.com/trade_3133112.html
产品网站链接：http://www.vooec.com/sjshow_3133112/