... fan 4.CE, ETL Swimming pool accessory , heat pump with Titanium heat exchanger, CE,ETL,SAA High COP above 5.2Shell ... .2) Economical and high-efficiencyUsing heat pump technology, compared with otherordinary hot water equipment (for example, combustion oil boilers, combustion ... environment. 3) Design flexibly,easy installationUnit design separately for main model and water unit model, with water unit ...