Well just got back from a trip to ace and picked up a hygrometer... It's pegged at... 85? 90? Percent? Don't know since it stops at 80 and it's past that...
So how swamp/evaporative coolers work is by drawing hot arid(dry) air through water saturated filteres. The energy expended evaporating the water, which in relativity easy since it's already fine droplets, cools the air, resulting in cooler, moister air. The advantage is they are very energy efficient, since all it is is a pump to keep the filters wet and a fan, and there dirt cheap. Just a bunch of tin, a fan and a pump. They work best in dry climates.
I have a large, rolling ac unit, 12500 BTU's I believe that also has a dehumidifier setting, but using it cuts the efficiency of the coolers in half since one dumps water into the air and the other removes it. But the cooler does a great job at cooling the whole house, in the morning our bedroom is a chilly 55 ish degrees and the other end of the house is 60 ish.
May have to keep the dehumidifier or AC unit pumping a few days to see how the humidity changes
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