Choice points: The main exhaust fan selection control parameters temperature, air flow, total pressure, efficiency, noise, electrical power, speed and shaft power. Exhaust fan at a temperature not higher than 85 ℃ conditions should be long-term normal operation. Exhaust fan shall ensure that: When the transmission medium temperature at 280 ℃ continuous work 30min when the exhaust fan, and the medium temperature cooled to ambient temperature still continuous running. At rated speed in the work area, fans of the measured pressure curve with the description given in the curve should meet the following requirements: 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). Exhaust fan flow should be required to increase airflow value of not less than 10% to 20% of the surplus amount. Pressurized smoke exhaust fan pressure value shall be calculated loop system is the most unfavorable specialized in producing exhaust fan, and to ensure that the value of residual pressure in the stairwell 40 ~ 50Pa. The residual pressure value inside the front room, shared room, fire elevator room, refuge floors, etc. 25 ~ 30Pa. Fire exhaust fan should be consistent with the current standard JB / T10281-2001 "fire exhaust fan technical conditions." Fan exhaust system should be set separately. Exhaust fan should be in the same position or an upper layer of smoke region. How efficient energy-saving effect of the full performance exhaust fan fire exhaust fan fire it called in used, not only to make the appropriate use and maintenance of exhaust fan sales, but also to its performance fully displayed, increase the use of wind turbines efficiency, so as to increase its scope of application, the majority of user acceptance. So we should make energy-efficient exhaust fan fire effect on how full performance of it, today as we detail below: for the existence of some relationship between the different flow exhaust fan manufacturer, we adjusted into several different ways of practices that regulate energy-saving mode has little effect, even not only energy saving, but because of the presence of adjusting means more power consumption. Variable-speed control curve closer to the ideal curve. Therefore, the variable-speed control mode is superior, especially the use of variable frequency motor speed control of energy-saving program is the best, but the need for additional frequency devices. Regulating exhaust fan fire, it is to let the wind pressure or wind turbines reach a standard, the fan artificially controlled. Through effective regulation, allowing high pressure air blower in ensuring the stable operation of the conditions necessary to meet the production requirements for flow or pressure but also to maximize energy savings. Although users will use a different adjustment method, but achievable goal is the same, but the effect is there are some differences. Select the adjustment method is not only related to the effect of exhaust fan fire, more fan energy savings will have a huge impact, so choose an appropriate adjustment method to keep fans on the premises to achieve the same effect of energy-saving effect. The only way to improve the efficiency of the fan, to achieve energy efficient, but also to better protect the fans, to extend efficiency. Exhaust fan, exhaust fan type, Sheng clean air-conditioning (certified merchants) from the Texas Air Conditioning Equipment Co., Ltd. Sheng-purification provided. Road Zhiyuan, temper forward. Texas Air Conditioning Equipment Co., Ltd. Sheng-purification (www.dzhffj.com) aims to become and you win symbiosis, strategic partners to move forward, more determined to become a fan, ventilation equipment most influential companies, together with you leap and common success!