We decided to purchase this A/C because I work from home and usually it is only me in the house for the most part of the day.  We hated turning on the Central A/C to cool the entire house when I was just using my office.  This little A/C cooled my office down to the point it was cold and when I forgot to turn it off, it cooled down the better part of the house! Our house is only a little over 2000 sq. ft. one floor but it made a difference to the point our electric bill was half of what it was before purchasing this A/C!  We love it! Excellent Purchase!! Would absolutely recommend it!