... 2)More high efficiency,COP 3)More fashional and beautiful All in one(multi-functional)heat pump system: ... 3,Heat preservation time lasts longer. 4,Authentically achieve water and electricity separation,much safer. 5,Low noise,more quiet. 6 ... supplied while the tap is opened and maintenance free. 7,Easy installation 8,Intelligent and automatic control,defrosting automatically,functional, it can supply ...