... heat pump technology, compared with other ordinary hot water equipment (for example, combustion oil boilers, combustion gas boilers, electronic boilers ... 3) Design flexibly,easy installation and replacement: Unit design separately for mainmodel and water unit model, with water unit inside, avoiding ... pump, has the DC inverter, Soft Star, Stainless steel shell for option Code SWBR-21.0B(S)SWBR-26.0B(S ...