The paper Improvement the possibility of using ground to absorb the heat rejected into the atmosphere by the condensing unit of normal air conditioner. To this end, the copper coil of condenser and buried at 1.1m, 1.2m, 1.5m depth where annual ground temperature. The required amount of R-134a refrigerant was 5.8 kg (1.2 kg for normal unit). It was found that with this modified unit, the coefficient of performance (COP) of modified air conditioner was much higher than that a conventional one. Consequently, there is a very high potential in using ground as a heat sink which would considerably contribute to saving the environment.