... With CE,EMC,FCC,SAA Certi HCSINO Quality Temperature Controlled Centrifugal Fan Kits ---Holds CE,EMC,FCC,SAA Certificate *Configurable idle ... below the thermostat threshold the motor will switch to the pre-set speed to maintain the desired temperature.Temperature controlled ventilation ... / 5024524500~1850690Φ315mm120 / 23060 / 5025025200~1900720 Quality In Line Hydroponic Centrifugal Fan Kits