I'd like to upgrade some of the window a/c that came with my house. I understand that window a/c should be the right BTU "size" for the square footage of the room . . . however, does that presume that the door of the room is closed? My first floor has a kitchen, lvg room, dining, 1 bedroom and family room. I typically leave the doors open and/or there are no doors . . . how do I figure out how many a/c and/or what size they should be? If I put just 1 that has BTU's sufficient for the total square footage won't I have 1 room that is freezing (where a/c is located) and the farthest room warm? If I do 2 (say in the living room and the farthest room)how do I decide what size they each should be?
Hope this makes sense.