According to the different requirements of senior civil use of variable speed or multi-speed drive form the heart reaches one machine (ie, when used through ventilation and fire high-temperature exhaust) purposes; airfoil into axial flow (HTF (GYF ) -I, II) and Francis HTF (GYF) -IG, also making rooftop silencer type. 2. High efficiency: This series of axial fan using advanced CAD software by the multi-objective optimization design of new products developed in the test shows that fan efficiency greater than 80%, some big machine number greater than 85%, and has a flat efficiency curve characteristics conducive to energy conservation; 3, easy installation, covering less centrifugal fan: The fan base in the form of an axial flow fan or mixed flow fan, direct pipe connection or wall mounting with the wind, the installation can be vertical or horizontal form. Considerably reduced footprint. Under normal circumstances, the exhaust should first cut off the air supply local reporting, so the combustion air fan, but in accordance with the "high level of civilian health plan made nuisance fire standards" (GB50045-95,2001年版) and in Article 8.4.11 "Libraries car repair garage, brakes library planning hinder fire standard" no direct (GB50067-97) defined in 8.2.7 exhaust fan manufacturers, high-rise residential building healthy smoke machine is located underground chamber and Car library There was an opening in the dispersion hinder fire district to the outside, when setting machine exhaust system, the air supply system when Hou set to be the same. Air system blower and exhaust fan to send air valve linkage should begin in fire, resulting in a positive pressure area, smoke exhaust before signing out. Two-speed exhaust fan and exhaust mechanical electron source shall request the fire power supply. As we all know, a large amount of smoke and heat fire, and consume large amounts of oxygen. On its hazards, particularly at night to smoke, smoke contains many toxic elements, even toxic exhaust fan wide occasion will lead to hypoxia due to combustion asphyxiation death. Every fire accidents in the burned persons, most are also the first to be smoked fainted after being burned when the fire spread fast smoke exhaust fan quotes, level up 0.5-0.8m / s, vertical up 6-8m / s. In the fire, the one fire, and then a smoke control. Is off the fire extinguishing, broken smoke source, smoke control system was to provide safe passage to escape, and to facilitate the initial fire; smoke control system is referred to as the smoke and smoke two parts. Today, while the height of high-rise buildings, but also the depth development of space, underground development, and high-rise buildings in the basement, the smoke control system is very important. The design of the unit concerned, we should pay attention to prevention in the design, exhaust design. Exhaust fan occasion wide | Chenyu air conditioning (certified) | exhaust fan by Wu Cheng 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.