HTF series exhaust fan fire for high-rise buildings, underground buildings and tunnels, drying room and other high-temperature exhaust or ventilation. Capable of continuous operation at 280 ℃ high temperature for 30 minutes or more, the medium temperature at 100 ℃ continuous operation 20 hours / times without damage, fire is the ideal necessary facilities. 1, the performance of the fan performance table lists the performance in the most efficient range, according to the performance of the air volume is divided into five operating points, according to prevail in the selection of the performance table. Factory fan qualified under rated air flow, total pressure value error does not exceed ± 5%, the performance of the selection table is a performance standard state, regardless of the technical documentation or performance are subject to the requirements of the standard state orders; 2, the fan installation can be divided into horizontal and roof two-speed exhaust fan fire prices, wind, total pressure, mounting dimensions and other properties have special requirements; fire exhaust fan set Location: exhaust fan fire from the side wall of the tunnel distance should not be too close to the exhaust fan, so as not to affect the ventilation. fire exhaust fan arrangement minimum distance from the tunnel wall is 20 cm, rescue "sentinel" setting the tunnel is divided into different regions of disaster prevention, full use of the rescue station at fixed inclined and fire at both ends of the tunnel as an exhaust fan into the fresh air and exhaust channels, cross ventilation openings must maintain positive pressure state fire control exhaust fan to prevent flue gas flow channel. ventilation system from a secure tunnel to cross the channel by direction of the air tunnel accidents, inhibit the flue gas into a cross-channel and tunnel accident did not occur to meet the evacuees facing fresh air into the tunnel cross passages and safety, while ensuring that the region needed to wait for fresh air. According to different tunnel accident disaster preparedness in the region with different ventilation mode. "sentinel" Disaster ventilation scheme implemented when the train rescue point set may be reversed in the "sentinel" range for all of the cross-channel fan made contact with fresh air from within the security tunnel. Fire roof exhaust fans, air conditioning, Chen Yu (certified), Chengde 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.