Exhaust system used for the basement, large shopping malls, large fire district, long corridors, as well as under natural draft conditions can not meet their needs plus mechanical exhaust system. Opening plus exhaust valve exhaust port form, plate electric exhaust port forms can also be normally closed. Fans can be used in conjunction with underground diversion. Basement, to be used in conjunction with the makeup air equipment. Adjustable exhaust fan fire, is to let the wind pressure or wind turbines reach a standard artificially control the fan. Through effective regulation, allowing high pressure air in ensuring the stable operation of the fan exhaust fan selection conditions, it is necessary to meet the production requirements of the flow or pressure can maximize energy savings. Although users can use different ways to adjust fire smoke roof fan, but achievable goal is the same exhaust fan wholesale, but the effect is there are some differences. Select the adjustment method is not only related to the use of exhaust fan fire effects, and more fan energy savings will have a huge impact, so choose an appropriate way to keep adjusting the fan to achieve the same effect in the premise of energy-saving effect. The only way to improve the efficiency of the fan, to energy efficient, but also to better protect the fans, to extend efficiency. Prominent feature fire exhaust fan performance is such that its effect is that these energy-efficient, we must be based on the above instructions for proper operation, to obtain better results. Fire roof exhaust fans, air conditioning Chenyu factory outlets (certified), exhaust fan provided by Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen Yu-conditioning in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu conditioning a better future.