The KF-25 mobile trailer refrigeration units are used for-20℃ to 10℃ temperature controlled for 20m³ box ,that is to say, you can use it on a 8 ft, 10 ft or 12 ft size box. the voltage is AC110V voltage, 60Hz . The flow rates of the evaporator and condenser blowers are 1100m³/h and 1000m³/h respectively.