Admitted the possibility of a short high-temperature air is not large, so why use the 280 degree heat of it. Consider draw more good than harm. Should use the 280-degree valve, the reason is very simple, natural mechanical exhaust air make Shihai not also to 280 degrees just do not make the wind. And just upstairs talking about, should all complement wind up new wind from the outside, does not contain smoke, even temperatures above 100 degrees also to air, otherwise the smoke can not run normally, 100-degree air to promote fire no effect of the smoke damper, people still can stay in a couple of Baidu dry air into it. 1,07 K103-1 (HVAC Building smoke and fire protection design) Atlas of the above settings, P28, P29, P30, P31 page smoke damper models are used in 70-degree air intake damper smoke damper mechanism , using 280 degree smoke dampers. 2, smoke control system requirements: After the fire alarm, stop the relevant parts of the air conditioning, ventilation system, turn off the electric damper, and receive their feedback signal; start the relevant parts of the anti-exhaust fan, exhaust valves, and receive their feedback signal (dampers, exhaust valves in series with the relay can control the appearance of beautiful smoke damper to make the last valve feedback signal); blower damper when it reached 70 degrees, automatically shut down, smoke machine when it reaches 280 fire dampers When degrees, automatically shut down; anti exhaust fan should be without coding module by direct manual control of the bus. [] Suihua smoke damper, smoke damper models, intellectual property rights provided by the manufacturer Hongxin air conditioning equipment. Welcome to consult the Texas Air Conditioning Equipment Co., Ltd. Hongxin (www.hxktsb.com), be sure to specify when contact is through the "Business Alliance Member" see, thank you! Contact: Yuan Qingxiang