1.R290 refrigerant,environmental friendly 2.Higher water temperature output up to 75℃ 3.Government subsidies 4.Adopt DC inverter technology, with high efficiency 5.High pressure protection 6.Defrost automatically 7.Ultra low noise（≤48db） 8.Adapt intelligent controller, full automatically operation 9.Can still operate efficiently in an environment of -30℃. 10.Through different installation,the system can be used for cooling or heating