tThis paper presents an experimental investigation of the Coefficient of Performance (COP)’s augmenta-tion of an air conditioning system utilizing an evaporative cooling condenser. The experimental facilityconsisted of four major components, which are, the compressor, the evaporator, the thermal expansionvalve, and the condenser. An evaporative cooling unit was located upstream from the condenser. Thermalparameters, such as relative humidity, dry bulb temperature, and wet bulb temperature were measuredto evaluate the effect of in-direct evaporative cooling on the system’s COP. The results indicated an inverserelation between the condenser inlet dry bulb temperature and the COP. The changes in specific enthalpyof the air across the evaporative cooled condenser were due to latent heat transfer and sensible heatexchanges, whereas the specific enthalpy changes for the conventional condenser were primarily causedby sensible heat exchanges. By using the evaporative cooling condenser to pre-cool the air, the saturationtemperature drop through the condenser increased from 2.4◦C to 6.6◦C. It also resulted in an increase ofthe mass flow rate of refrigerant that went into the evaporator. This mass increase of liquid entering theevaporator consequently resulted in the increase of COP from 6.1% to 18%. A power reduction up to 14.3%on the compressor was also achieved. The result reveals the relation between water consumption andcompressor energy saving regarding to their costs. Although greater power reductions were fulfilled athigher dry bulb temperatures, in this circumstance, the cost-optimal applicable temperature is around33.1◦C.