How Does an Evaporative Cooler Work?
Nature’s most efficient means of cooling is through the evaporation of water. A simple example is the cooling you feel when stepping out of a swimming pool- the water evaporates quickly from your body, taking heat with it. Our coolers do essentially the same thing by drawing hot air through wet pads using a fan or blower. As water evaporates from the pads, it takes heat from the air with it, resulting in up to 30 degree cooler air being discharged from the cooler. Cooling Temperatures An evaporative cooler will nearly always deliver air cooler than 80 degrees F. In addition, the constant air movement created by an evaporative cooler lowers the temperature perceived by room occupants – called the “effective temperature” – by an additional 4 to 6 degrees below “evaporative cooled temperatures.” Finally, an evaporative cooler works best in the hottest time of the day. This is because relative humidity drops quickly as temperature increases. For example, a morning relative humidity of 60 p
