... throttling devices can control the refrigerant flow more accurately3) Compact structure and good demountabality4) Titanium coil exchanger with full resistance ... before pacage in the factory. CERTIFICATIONSCE, CB, EC, ETL, CETL, C-TICK, WATER MARK, STANDARD MARK, UL, SABS, SANS, SAA, ... Management MACON swimming pool heater(CE, CB, EC, ETL, CETL, C-TICK, WATER MARK, STANDARD MARK, UL, SABS, SANS, SAA, ...