Because the underground chambers by underground limiting factors and space, in the wind and air pressure and other factors of satisfaction coefficient, fire fighting systems and smoke exhaust ventilation is usually used in combination can, therefore, we in the underground garage Use two-speed fan, the same is basically the same fans and the same duct. Under normal circumstances, as the exhaust ventilation fan running at low speed applications, when a fire, fan into a fast run both stand as fire exhaust fan applications. So use a machine 2, Longyan exhaust fan, not only decrease the cost of health made, save space, more important thing is to greatly enhance the configuration of the application rate and credibility. Should the smoke exhaust and harm are basically two systems left, but the fire exhaust fan only, produce fire bet when running, usually fewer applications, as revealed problems not easily be discovered in time and get the repairs, and real fire When not easy to guarantee Hang Shun betting applications. The two-speed fan just to overcome this deficiency, usually as an exhaust fan running, the problem appears to be excavated and get timely repair, exhaust fan specifications, often in a good posture drops ready. Scope: MHL3-2A, MPYH-14A (MHTFL-14A) Francis two-speed high-temperature exhaust fan, exhaust fan maintenance, a new type of wind turbine is between axial and centrifugal fan between having high pressure centrifugal fan, axial fan a large flow, high efficiency, energy saving and low-noise, exhaust fan manufacturers, and easy installation. MHL3-2A, MPYH-14A (MHTFL-14A) Francis two-speed high-temperature exhaust fan, novel design, compact structure, small size, light weight, easy to install, and old-fashioned compared to centrifugal fan can save 20% When speed is less than 2000rpm, noise below 75dB works: Almost two-speed high-temperature exhaust fan at low speed in order to meet the exhaust air flow, when a fire occurs, the temperature exhaust fan in the cabinet under the joint control of the role of automatic high-speed operation, in order to meet Smoke need, while fire smoke partition exhaust pipe smoke damper and smoke damper makeup air duct smoke and make no operation of wind, automatic smoke dampers exhaust smoke partition other fan manufacturers, Chen Yu-conditioned (certified), exhaust fan Longyan City by Wu Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs ??? Chen Yu-conditioned in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu air conditioning better future.