I purchased the LW1216ER after extensive careful research of window AC's. This unit is simply not cooling the space, which btw is a little under the square footage it is intended for. I turn it on 3 hours in advance in hopes of the room being cool by the hottest time of day, and the room is still only slightly cool at best. Even worst, it was a BEAST to install. I had two professional installation companies attempt to install it. After over an hour of trying, the first company was unable to do it. Hired a 2nd company and after two visits, the 2nd company finally was able to complete the installation. Puzzled as to how and why this unit received a high rating. Dissatisfied with this unit and would not recommend.