Energy saving is one of the key issues, not only from the view point of fuel Consumption but also for the protection of global environment. So, it is imperative that a Significant and concrete effort should be made for conserving energy. This paper discusses the energy conservation in single split Air Conditioning system addition of helical coil intercooler act as a heat exchanger. The fluid which consisted mixture of water and anti-freezing materials like ethylene glycol with ratio 50:50.The inter cooler reduces the refrigerant entry temperature in the evaporator from 18 to 13°C and also compressor outlet temperature from 70 to 45°C. The compressor's running time is reduced from 44 minutes 30 seconds to 29 minutes. The required indoor temperature of 18$C is reached in 15 minutes 30 seconds earlier. It is evident that the time taken for cooling by the modified system is 34.83 % less than that of the existing split air condition system. Time taken for cooling reduces means compressor running time reduces automatically improve the efficiency of the air conditioning system. The new system reduces the energy consumption and also indirectly reduces the global warming.