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•Our Non-power Ventilations do not need the electric power, easily driving the turbine vanes to rotate.
It begins to revolve at the wind speed of 0.20m/ s or when temperature difference between indoor and outdoor is 0.45C.so as to make sure the running without cost.
They are the real practical and energy saving products without noise and pollution, so they can save much electric power and labor for users in order to lower the production cost clearly, to improve the working surrounding of the workshop, to rise the working efficiency even to strengthen the quality of the their products. 

•1)High-efficiency ventilation
2)High-quality stainless steel body
3)EaXHand fast installation.
4)Environmental protection, energy saving and no electricity cost.
5)stable and durable, dehumidification, anti-sweat and rain-proof.
6)High sensitivity and no noise.
7)All the ventilators using complete senior axis bearing,nolubrication.