Aziz, AzridjalHarianto, JokoMainil, Afdhal Kurniawan2016-04-162016-04-162016-04-162086-3403wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/8202Central air conditioning is one type of refrigeration machine that is widely used in large or multi-storey buildings such as offices, hotels or shopping malls. Waste heat energy from the condenser of refrigeration machine is generally rejected as useless energy. Actually, this thermal energy can be utilized for energy-efficient water heater, as a source of energy obtained for free from the condenser waste heat energy. To determine the wasted heat energy that can be used for the water heater, it is necessary to count the heating potential. The calculation and analysis of data obtained showed that the energy potential of waste heat in the condenser that can be used as a water heater is equal to 228.318 kW with a maximum condenser inlet temperature is 57.78 °C.enpotentialCentral Air Conditioningrefrigeration machinewater heatercondenserUR-Scientific Work Lecturer