1.Solar+air+electric+tank all in one system 2.COP 5.4 3.Dc inverter 4.EEV&PHE use 5.Flexible,floor,radiators,coil,water SAVE ENERGY, COMFORTABLE WARMTH IN YOUR HOME ENS All in one heat pump is a synthetical system with astainless steel-lined hot water storage tank.,air source heat pump, two plate heat exchange ,solar system connection, The system recovers energy from the ventilation air and solar ...