... hall-free, power,etc.Applications: External rotor motor, centrifugal fan, centrifugal blower, axial fan in HVAC,Tele-communication, refrigeration, clean room, IT industry ... saving motor, DC and EC Centrifugal fan, DC and EC axial fan, DC and EC circular duct fan, EC Gas blower, etc. High ... efficiency EC fan 24V brushless DC motor ...