I researched A LOT of AC's to replace the one we had. We wanted something more powerful that would cool our 15x20 foot room during the hottest part of the day when it's 90 out with 90% humidity. And low and behold it does! We are very happy with this AC, and are also happy that the volume level is good. I mean it's a portable AC machine so you know it's on, but it's MUCH quieter than our old one and we can sleep with it on, even when it turns off and on during the night.