Exhaust fan for the selection of the main 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 low-noise exhaust fan, and the medium temperature cooled to ambient temperature still continuous running. Aerodynamic performance test aerodynamic performance test fire exhaust fan in accordance with the provisions GB + T 1236 will be. Sound Test noise measurement method according to CB / r 2888 requirements. Noise limits should be consistent with the provisions of 7BIT 8690. High temperature test rod into the press GA211 regulations. High performance crystal playing field required to achieve the specified 4.42. Exhaust wind chassis zatfsb proof exhaust fan, the Yanbian Korean Autonomous Prefecture. Exhaust fan, air conditioning provided by Yanda Yanda Wu County air-conditioning plant. Wu County Yanda air-conditioning plant (www.wcydkt.com) (www.wcydkt.com) strong, credible, Shandong Texas heat, refrigeration and air conditioning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Yanda into the brilliant air conditioning and you work for a better future!