The unit is huge, make sure you measure your window beforehand, and it requires some outside support. The unit does cool my 3rd floor 500sf apartment, however it is loud.  At times louder than others depending on how the fan it kicking in.  If I were to do it again, I'd drop the BTU's to 13,000 max. The unit was far too large to try to return, so I'm keeping it, but lesson learned.