Choice points: exhaust fans choose the main control parameters for temperature, air flow, total pressure, efficiency, noise, electrical power, speed and shaft power. Exhaust fan at medium temperature not higher than 85 ℃ conditions should be long-term normal operation. Exhaust fan shall ensure that: When the transmission medium temperature at 280 ℃ during continuous work 30min roof exhaust fan, and at medium temperature cooled to ambient temperature still continuous running. At rated speed exhaust fan in the work area manufacturers, fan pressure curves measured with the instructions given in the curve should satisfy the following requirements: axial-flow exhaust fan at a predetermined flow rate, corresponding to the pressure value deviation of ± 5%. Centrifugal exhaust fan in the flow specified proof exhaust fan, the corresponding pressure deviation ± 5%. How it works: the usual two-speed high-temperature exhaust fan at low speed in order to meet the exhaust air flow, when the fire broke out, the high temperature exhaust fan in the cabinet under the joint control of the role of automatic high speed exhaust fan to meet the needs of smoke, while the occurrence of No action exhaust pipe smoke damper fire smoke damper and smoke partition makeup air and exhaust pipes make up the wind, smoke partition other automatic smoke damper exhaust fan manufacturers, air conditioning prices Chenyu Minimum (certified), exhaust fan Cangzhou city by Wu Chen-yu air-conditioning Limited. 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.