Easy to assemble and get into service, so far doing a much better than expected job of cooling substancially more area that what it was recommended for (using in a VERY old (1926) 850 square foot house, BUT.. it also hasn't reayy got HOT yet, so we shall see? It does however really put out some good cold air and at a high volume so I definitely think that it will not be too bad. In "my" situation, I think that a second one in the opposite end of the house I believe would be much more than adequate for extreme comfort. My main reason for this type of unit was that I wanted to get away from the ugly window units hanging out the windows of an old house that I am trying to keep looking fairly nice from the outside.