Thanks for the input, Scott. I wouldn't have thought they would be prevalent down here, either (we're not as humid as Houston, but damned close
), but there are several few shops--automotive, florist, etc.--in San Antonio where I've seen them in use and spoken to the owners. As a rule they have indicated that the coolers create a drop of 10 degrees or more on even the hottest days. I'm more concerned about introducing even more humidity into the environment, especially during those months here when it's still hot but (relatively) dry. I don't know enough about the engineering principles involved, I guess, to know if the fact that the air is significantly cooler somehow negates the effects of the tiny water droplets it is carrying...