... switch for water flow protection7) Intelligent controller and adjustment by quick-mind microprocessor8) LCD wire controller with touch screen9) Air exchanger ( ... for every unit before pacage in the factory. CERTIFICATIONSCE, CB, EC, ETL, CETL, C-TICK, WATER MARK, STANDARD MARK, UL, ... , Lean Production and Management MACON swimming pool heater(CE, CB, EC, ETL, CETL, C-TICK, WATER MARK, STANDARD MARK, UL ...