Learn About Evaporative Coolers

In optimal conditions, a swamp cooler can lower the temperature by as much as 20° F.  Modern swamp coolers use simple technology and electrical power to provide a cooling effect.  A motor essentially pumps water into water-soaked, fibrous pads, while a fan powered by a separate motor pushes air through the pad.  In arid climates, the entering air is hot and dry and the water will be evaporated.  Not only does this decrease the ambient temperature, but it also makes the environment more comfortable because the chilled air is always recirculated and somewhat damp. 

When deciding on a swamp cooler, pay attention to the unit's moving capacity and installation and maintenance requirements.  Furthermore, be aware that air coolers may require a bit more maintenance than portable ACs, but this usually only consists of refilling the water supply, draining the unit, and ensuring the pads are clean.  Nonetheless, swamp coolers are still quite popular because they can effectively cool by using one third the amount of energy of traditional air conditioners.