Exhaust fan choice points: exhaust fan in the instructions given operating point lower than the A-weighted sound level noise limits should be consistent with the provisions of JB / T8690-1998 of. Exhaust fan can be an ordinary or special steel centrifugal exhaust fan axial fan. Exhaust fan specifications according to "fire protection design of tall buildings" in the regulations. The minimum air volume exhaust fan 7200m / h cf type kitchen exhaust duct fans, should not exceed the maximum amount of wind 60000m / h (refer to a smoke partition maximum amount of wind). Exhaust fan air flow should be required to increase airflow value of not less than 10% to 20% of the surplus amount. Exhaust fan test methods: cutting impeller balance correction 7BIT 9101 according to the provisions in the balancing machine. Impeller speed test conducted according to the provisions 7BIT 6445. Mechanical operation test fire exhaust fan in the work book Jen confusion kitchen exhaust fan speed continuous operation design, bearing temperature stable after 20min, bearing m liters and vibration measurement. no more than a liter of the 4nC, vibration and seized 99 m values ??should be consistent with the relevant provisions of 7Bfr 96V. Kitchen exhaust fan design, Hakusan City, exhaust fan, air-conditioned double benefit low prices offered by the Texas two-Carrier Air Conditioning Equipment Co., Ltd. Carrier Air Conditioning Equipment Co., Texas two (www.slktsb.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the double benefit air conditioning and you hand into the brilliant, for a better future!