This unit works well, but don't expect it to cool a large open space like a smaller window unit would in a medium sized room like a bedroom or office. Our 2nd floor apartment can get into the 100s on exceptionally hot days and this will bring the temps down in our rather large living room to the high 80s - this means we can actually go in the room during a heat wave! That being said in a large room it's more going to make things bearable, vs comfortable. If you have a room of 300 sq feet or smaller, I would imagine this will cool it quite nicely.  I haven' t tried the dehumidifier or heat options.