This unit is doing the job in a big room of an old brick home.  Installation was not as easy as others I have installed.  The according wing fillers are weak and do not align well.  The screws to hold these plastic wings in place were huge 1".long.  Them these wings come with a stick on foam to insulate them.  The foam barly sticks and if you plan to remove for winter the reinstall next spring you will need to find somthing else for this task.
It is quite heavy even for two people hanging out the window.