... 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 ... kWSound pressure level measured at 1m from the unit Heat Pump All In One ( 5KW, Air +solar DC inverter heat pump )