>Aren't swamp coolers only really useful when the humidity is under something like 50%? They are less effective, but still work. As long as the dew point is ~7

>Aren't swamp coolers only really useful when the humidity is under something like 50%? They are less effective, but still work. As long as the dew point is ~72 degrees, or lower, they can still cool enough to do the job (although of course not to the extent of an AC). But yes, ultimately it comes down to people being ok with not setting the AC to 68 degrees when it's 80 degrees out, and using the minimal amount of cooling necessary to be comfortable.