TG No-power Turbine Ventilator

Our Nopower Ventilations need not the electric power instead of easily driving the turbine vanes to ratate by nature breeze or the temperature difference between indoor and outdoor so as to make true 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 labour 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.