As we all know, a large amount of smoke and heat fire, and consume large amounts of oxygen. On its dedicated exhaust fan fire hazards, particularly at night to smoke, smoke contains many toxic elements, even though non-toxic, can also 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 smoke spread fast, level up to 0.5-0.8m / s, vertical up to 6-8m / s. In the fire, the one fire exhaust fan, 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. We plan on several projects in recent years, but stresses the high temperature exhaust fan fire, such as Tianmu Road Branch train halfway Shanghai China Electronic Information Management Building, the building a total of 16 floors, the underground chamber (2000m2 top and bottom) of the brake library. In planning we consider the harm tobacco and machine smoke machine, both set outlet in every room floor escalator, front room and other locations, the pressurized air through the fan, and then curse the files generates positive pressure flue violations, in order to maintain Ping dispersed. Set on the channel exhaust valves, top pull or move closer to the top of the wall is set to pull the exhaust port, the exhaust flue gas discharge machine Chu outdoor temperature is high. And screenings are set to large-amplitude surface hinder smoke partitions, just behind the smoke nuisance survey is reported in which the exhaust smoke partition. So as to expand and increase the pre-harm just smoke the field, causing a discrete fireworks. Otherwise, not only affects the smoke effect, but also may lead to the flue gas temperature due to high non fire sprinkler lotus position on their own tents and mess spray head fracture, affecting both the fire effect and cause unwanted damage. Nuisance, nuisance smoke exhaust systems and smoke are two parts (BuFen) is saying. Now senior Hou Jian made at the same time to the extent, spatial development (FaZhan) similarly to the depth of the underground development (FaZhan) kitchen exhaust duct fans are made at the top healthy underground chamber, harm, exhaust system is particularly critical. Of the Planning Unit, while speaking, we should pay more attention in the planning of the harm, smoke planning. Two-speed exhaust fan, Chen Yu-conditioned (certified), Hohhot 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.