I put this in my bedroom window that was getting to hot to sleep in (I work at night) and the first day I was reaching for a blanket using the unit on low! I do have a very small bedroom not well insulated and it was high 90’s outside. I have had it 1 week and LOVE it! I have not used it on high yet.I have to turn it off at night because it gets too cold. Simple to install, I covered everything except the unit itself to block any light or draughts. I first made a mistake and used low fan instead of low a/c. After that I was chilled and sleeping soundly.