According to the US Department of Energy (DOE), an evaporative cooler can successfully reduce the ambient temperature by 5 to 15 degrees—but even the DOE is quick to clarify that this process works only in areas with low humidity.

Are portable swamp coolers worth it?

Using portable air coolers is very cost-effective to cool your place without spending much money on electricity. Swamp coolers cost up to 50 percent less than air conditioners that use refrigerated cooling systems. … Because the operating costs needed are only for water and electricity.

Do portable swamp coolers work inside?

Evaporative coolers can be used in outdoor or semi-outdoor areas (like garages, porches and backyards) anywhere in the country – even if you live in humid conditions. Swamp coolers do, however, add moisture to the air as they cool. If you live in a typically humid and hot climate, then don’t use them indoors.