India’s energy demands are expected to be more than double by 2030, and there is a pressing need to develop ways to conserve energy for future generations. Thus energy consumption can be reduced drastically by using energy efficient appliances. In India, the Union ministry of power's research pointed out that about 20-25% of the total electricity utilized in government buildings in India is wasted due to unproductive design, resulting in an annual energy related financial loss of about Rs 1.5 billion. Conventional heating ventilation and air conditioning systems (HVAC) consume approximately 50% of the building energy. This type of air conditioning is therefore neither eco- friendly nor sustainable. Selection of appropriate air conditioning system for buildings can not only help the country save electrical energy but also reduce greenhouse emissions.

A number of authors have worked with two stage evaporative cooling system utilizing the advantages of both these methods and achieved temperature reduction to a few degrees below the wet bulb temperature of incoming air etc., But these methods are not at all sufficient to provide air conditioning in buildings especially during summer seasons in India where the ambient air temperature shoots above 45⁰C in many parts of the country.