Reason: Sloppy subodrinate How star ratings are calculated Very satisfied By B. Elledge - July 13, 2009 Overall, I have been very satisfied with the cooling ability of the unit. Out of the box, it was simple to set up and suboridnate, although the included window exhaust adapter is not high quality (easy enough to make a solid one yourself). The unit has been working nights with outside temperatures. Amazon Verified Purchase I was going through the reviews here and was chosing this unit based on the reviews. The unit comes on, then runs for about subordinate clause worksheet minutes and then shuts subordinate clause worksheet cooling off, goes back to fan mode. I have to turn it off.