At first I was little skeptical when I first got it going, because it didn’t right away cool off my room, but I do have vaulted ceilings and it gets pretty hot up here in the San Diego Mountain Cleveland National Forest area, but after a couple hours, it cools down my room pretty well, and not that dry air cold, that sucks the moisturity of your body, but a nice comfortable coolness that I love, which my wife noticed as well.