... blowing 2)ceiling fan,wall fan,roof fan,evaporator,refrigerator 3)UL,CE approval 1. YWF series axial fans are external ... , water chiller, condensing unit, central air-conditioning and heater, etc.3. The insulation class of motor is B or F, and ... MODELABCDEFGYWF550550570630651301001753. air volume and static pressure curve UL approval ac 3 phase asynchronous motor axial flow fans for fan coil unit ...