Energy Efficient, Indoor & Semi-Outdoor Portable Air coolers that come with A world of features Aisen air coolers gives instant relief from the scorching heat by delivering strong gush of naturally cooled air even in peak summer. Every cooler is made with highest quality components to give robust & outstanding performance under extreme weather conditions while superior aesthetics tastefully add up to the surrounding ambience. Aisen coolers work on evaporative air technology which is the most natural way of cooling. Warm air is drawn inside the cooler through cooling pads on which water is continuously dripped evenly. The water drops take the heat of air and evaporates thereby cooling the air inside the cooler. Cool air is then blown out of the cooler by powerful blower or fan to give cool air comfort. No gaseous refrigerants are used in Aisen air coolers and with low power consumption, it is the healthiest and energy efficient way of getting cool air. Unlike, air conditioner which circulates trapped air inside the room, Aisen air coolers keeps drawing fresh air through open windows and doors and gives continuous flow of cool and fresh air.