Might be a little louder than a window unit. Note the fan has 3 speeds and it works much better for a quick cool down at F3. It works good for the size room it is designed for, I think it was 300 sq feet. Not sure if the luvers open and close while using. they do open up when turned on so maybe the do if you set it with the remote. I did not need that function as I knew where I wanted it directed and it stayed in place. It would be nice if they had a super quiet mode for once you have a bedroom cooled down and just needed it to work at a minimum; perhaps no portable does that. The F1 is not too loud as the sound is directed up and your laying down in the bed to the side.