Air-cooled Refrigetaion Unit: 1.evaporating temperature: -30c ~ -5c. 2.Low power consumption 3.Easy and quick install The features ... kinds of refrigerant, such as R22,R404A,R507,R134A,R407C .2. The same series compressors can apply to different conditions.3 ... area, less refrigerant filled volume.6. pressure controller use pressure sensor control which can monitor high and low pressure of refrigeration ...