This air conditioner works great way better than I expected, I put it in a 16 by 24 garage that has 10 foot ceilings and no insulation in the walls or ceiling. The walls are finished on the inside as well as the ceiling is Sheetrock but with no insulation I didn't think there would be any hope of keeping it cool but this unit works great it keeps it quite comfortable during the day even with the sun bearing down and will freeze you out at night! Very satisfied!