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Home > Evaporative Coolers

Evaporative Coolers for Sale at R.E. Williams

If you live in a dry region, try an evaporative cooling system for your home. Evaporative coolers bring in outside air and then lower its temperature through condensation. However, these units lose cooling power when relative humidity rises. For homes located in arid regions, evaporative coolers run on far less energy than air conditioners, reducing consumption and operating costs.

Our selection of residential evaporative coolers is affordable and efficient, a cooling system that won’t break your budget. Try the Sunpentown SF-613 air cooler, featuring an LED display and convenient remote control. This user-friendly product is equipped with a washable cooler and nearly silent motor, perfect for use in your home. The affordable five-in-one evaporative air cooler also functions as a fan, air purifier, heater and humidifier. This compact item is eco-friendly, CFC free with super-low energy consumption. Take advantage of this cooler’s activated carbon filter, four fan speeds and ice compartment where you can insert ice for extra cooling power. View our affordable line of energy-efficient home cooling systems at RE Williams.

The process of evaporation happens all the time. Our bodies, for example, perspire in hot weather; through evaporation the sweat dries and drops our body temperature.

Whenever dry air passes over water, some of the water will be absorbed by the air. That's why evaporative cooling naturally occurs near waterfalls, at rivers, lakes and oceans. The hotter and drier the air, the more water that can be absorbed. This happens because the temperature and the vapor pressure of the water and the air attempt to equalize. Liquid water molecules become gas in the dry air, a process that uses energy to change the physical state. Heat moves from the higher temperature of the air to the lower temperature of the water. As a result, the air is cooler. Eventually the air becomes saturated, unable to hold more water, and evaporation ceases.

Evaporative Cooling Chart - Typical Results With Evaporative Cooling, based on outside temperature and relative humidity.  Note:  The higher the relative humidity the less temperature drop from the evaporative cooler:

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