A perfect way to beat the heat and also to save loads of energy in the process, evaporative coolers have gained in popularity in recent years. Based on the simple principle that evaporation of water results in cooling, an evaporative cooler can decrease the temperature of the surroundings by a considerable number of degrees. Evaporative coolers can drop the surrounding temperature by four to six degrees. Evaporative coolers work best at the time of the day when it is the hottest and the humidity levels are the lowest.
