We are renovating a home while living in it and installing a whole new system from gas to electric. Since this past summer the temps were in the triple feels like digits, we got this bad boy. We put it in our room which is a 12x13 or a little bit bigger, and it's kept it icy!! It's absolutely awesome! Amazon thankfully delivered it gently and carefully which is a major plus. We did have to make adjustments for it to not leak though. We got a super sturdy tall end table and set it on top of that so we could take the clear pipe it came with and insert it into the unit and pop it out of the window so it would keep running on super humid days. The window slide piece that you attach the vent to wasn't long enough for our window, but my husband had an extra piece of board insulation from our camper. So we put it all together and it works. We only had one or two instances where it froze up with ice, but it rained pretty hard and we didn't think about cutting it off, so that was our fault. (Hairdryers work pretty well for that!) I love this unit and Id buy another one.** I also thought I read something about heat on this one, just be aware that this unit is AC only. Just wanted to clarify for anyone who's looking for both.