Just keep in mind this only works if the humidity where you live is on the lower side. If you deal with high humidity where you live you won’t experience nearly as much cooling from those wet curtains or the old wet towel over a box fan trick.

The towel on your head still works though because it’s on a much smaller scale unless you’re dealing with near 100% relative humidity. Double that with a fan of some type and you’re in business.

I was searching to see if someone had posted this already because that was exactly what I wanted to contribute. Excellent work!

As another person stated, that’s an evaporative cooler or “swamp” cooler.

AC works by “moving” heat energy from one place to another by way of the refrigeration cycle. This helps you feel comfortable by both cooling the air and also as a byproduct it removes humidity from it. If you want a nice long video on how that works just search “technology connections air conditioning” on YouTube and enjoy. Very informative.

Upvoted for Technology Connections. If you didn’t link that video I was going to. Window units, if you can mount them or get help mounting them, are superior in every way.

The main problem with swamp coolers is they don’t work very well or at all in high humidity climates due to the way in which they cool air. I’m from East Coast US and it gets pretty damn humid in the summer, which is honestly worse than the heat some days. AC is honestly the best solution if dealing with heat and humidity because it combats both issues even if it can’t fully cool a space.

Dryer climates though? Wet towel over a box fan all the way baby!