That's kind of my point. The one in your link won't work for this application. There are some situations it will work for, but not Shane's. The humidifier "feature" described is what you'll end up with. Evaporative cooling works on the principal of... Evaporation! And in a sealed environment that evaporation will constantly ramp the humidity (That humidifier "feature" again!) until the air has so much humidity in it that no more evaporation occurs, hence no more cooling. It will cool for a little while, but once the air is saturated, it's done. If you expect to put in in the middle of a sealed room and keep it cool on a continuing basis, please make sure you buy it from somewhere with a good policy on returned merchandise.
- Paul