The turbine ventilator is the use of natural wind and indoor and outdoor temperature difference caused by the air convection to drive a turbine rotation to take advantage of the centrifugal force and vacuum effect to fresh indoor hot air exhaust. Non-powered fan purposes: generate air convection, the row of cooling gas. To reduce air conditioning load, increase the indoor fresh air. 3, out the roof moisture, Meiqi,, steam, keep the roof dry. 4, instead of heavy-duty electric exhaust fan to reduce the cost of stents to save electricity, and subtract the noise. 
 The Liaocheng Sunlight Stainless Steel Co., Ltd. is currently the only one specializing in the production of roof ventilation equipment manufacturers. In recent years, under the joint efforts of engineers and technicians, factory production of free electricity --- roof ventilation domestic specifications largest, most complete variety of manufacturers, one of which 300, 360, 450, with in residential buildings, villas floor roof ventilation mouth, 500, 600, 680 is mainly used for factory workshop and large public places ventilation exhaust. Contact: King Star Sales Tel :0635 -8,322,238 13,906,356,805