The unit doesn’t get any quieter with a lower temperature setting. We put it in a room about 150 square feet and it cooled it down 10 degrees within an hour (off of perception). To keep from drilling holes into my window, I got two 3 foot strips of wood approximately 3/4 inch by 1 inch and used the drill holes for the side panel fans to extend them to my desired length. Then I added some wood blocks on top of the window to keep it from being opened. It turned out really secure! I’m sure GE can’t recommend this mount though.