Axial-flow exhaust fan at a predetermined flow rate, corresponding to the pressure deviation of ± 5%. Centrifugal exhaust fan at a predetermined flow rate, corresponding to the pressure deviation of ± 5%. A sound level than the exhaust fan noise limits in the specification given operating point should meet the requirements under the JB / T8690-1998 of. Exhaust fan can be an ordinary or special steel centrifugal fan axial exhaust fan. Exhaust fan specifications according to "fire protection design of tall buildings" in the regulations. The minimum air volume exhaust fan 7200m / h, the maximum air flow should not exceed 60000m / h (refers to a partition of the maximum exhaust air volume). Features editor HTF series fire temperature exhaust fan system national "Spark" project product exhaust fan, with excellent performance, high temperature performance, high efficiency, covering less than the centrifugal fan, easy installation. 2, HTF Fire fan high temperature performance: Fan tested to meet fire code standards GBJ45-82 exhaust fan installed above the standards set up internal control systems to ensure exhaust fan designed for continuous operation at high temperature 300 ℃ 60 conditions minutes or more, at a temperature of 100 ℃ for 20 hours / time is not damaged, widely used in high buildings, oven, underground garage, tunnels and other occasions. 3, performance HTF Fire fan performance table lists the performance specifications of the exhaust fan in the most efficient range, according to the air volume is divided into five performance points, according to prevail in the selection of the performance table. Fire fans quality products manufactured in the rated flow, total pressure error does not exceed ± 5%, the performance of the selection list is performance under standard conditions, regardless of the technical documentation or orders required exhaust fan pictures, Sheng clean air conditioning (already certification), Hechi exhaust fan from the Texas Sheng provide clean air-conditioning Equipment Co., Ltd. Texas Air Conditioning Equipment Co., Ltd. Sheng-purification (www.dzhffj.com) is an industry leader in Shandong 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 . Sheng leader in clean air conditioning with the staff warmly welcome all inquiries negotiations to create clean air conditioning Sheng better future.