Swamp coolers

[early]

This is what we call em in NM
" evaporative air coolers don't work everywhere. Swamps, for instance, are lousy places for swamp coolers. It's not entirely clear where they got the nickname, but it probably refers to the humidity they add to the air or the swampy smell that can develop when they aren't cleaned often enough. In order to work, they need a hot, dry climate. "

Last year I did not pay attention to humidity for my few Phals, because I did not know any better. The swamp cooler works very well in my home. 100* out and 70* in.
My question is for anyone else in a dry arid climate, do you use evaporative coolers, and what effect does it have on orchids. Should I still run a couple of humidifiers near them, I guess that would be trial and error, but I am a curious one and just thinking ahead.