Air to Water Converter: 1.Function:cooling and heating 2.COP: 5.2 3.Patent ... for every unit before pacage in the factory. CERTIFICATIONSCE, CB, EC, ETL, CETL, C-TICK, WATER MARK, STANDARD MARK, UL, SABS ... , Lean Production and Management MACON swimming pool heater(CE, CB, EC, ETL, CETL, C-TICK, WATER MARK, STANDARD MARK, UL, SABS ...