Evaporative air cooler --- or "desert cooler" --- use water to push warm air out through open windows to keep homes naturally air and cool. Evaporative air cooler cost about half as much to install as central air conditioners and use about one-quarter as much energy. Because evaporative air cooler provide natural humidity, they're best used in dry, desert-like climates.
Instructions
Select the right size evaporative air cooler for the room or area you want to cool. Evaporative air cooler is rated by the number of cubic feet per minute (CFM) of cooled air that flows into a room. Typical models (from portable types to whole house duct systems) are sized from 3,000 to 25,000 CFMs. Figure out the cubic feet of the area you want to cool and divide by two to determine the appropriate size cooler you need.
Decide if you want your cooler to blow air into one or more smaller rooms (as in a central location installation) or to cool your entire house (as in a ducted system installation). Portable air cooler-- or horizontal-flow coolers --- are installed in a single window and are good for cooling one room or a small part of your house. Ducted systems are ideal for large homes with hallways and many bedrooms to cool.
Open window in different rooms and at varying heights to experiment with temperature and humidity levels. If your windows are open too much, you'll feel the hot air coming in and your cooler will operate less effectively. If your windows aren't open enough, you'll get more humidity than you bargained for. Close windows in rooms that aren't being used.
Maintain your evaporative air cooler so that it runs efficiently throughout the summer. Change the pads and filters at least twice during the cooling season. Check the pump and reservoir for sediment accumulation and clean it out regularly. Evaporative air cooler need to be thoroughly cleaned at the beginning of every season.
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