Evaporative cooling is actually an oldest and simplest form of air conditioning available till today. Generally when dry air comes in contact with water, it absorbs the water and becomes humid or damp air. When the air is less humid, it can absorb more water and a large amount of evaporation takes places. Similarly, evaporative cooling systems evaporate the water to cool the air. Fresh, warm, dry air from outside is drawn in via a cooling unit. This warm air is passed or filtered through moist pads or quilts where evaporation cools the air and increases its moisture content. The cool air is distributed in the house via ducts or outlets placed strategically throughout the house. The process is as similar as to the experience of feeling cold as soon as you get out of a swimming pool, in a breeze. Continue reading