LG LW1216ER windows mounted AC unit. We only used it for 3 summers and it was only mounted for 2-3 months each year. Otherwise it was stored in the original box in my basement. We now have a whole home unit so we're selling this one. It did a great job of cooling our upstairs with 3 bedrooms. We were lucky enough to have a window at the end of the hallway and used fans to direct the cool hallway air into our bedrooms.