Have you ever wondered why you feel cool by the sea? This is because the hot air that is blown over water, causes some of the water to evaporate and absorbs the heat. An evaporative air cooler works on the same principle.
When the fan runs inside the air cooler, evaporation is created. Fresh air is sucked into the air cooler through the wet cooling pad. As the hot air passes over the wet surface of cooling pad, the water evaporates into the air stream. This moist air absorbs the heat and therefore cools the air.
Evaporative air cooler is a high tec-tch product, originally from USA, now this type of product is used in many countries .