Because heat rises, the ac unit will work best the higher up you can place it.I have purchased a 24000 btu AC an its heavy I can't place it at the top of the room. But can place it in the middle level. Will it matter where i place AC or it doesn't if I want even temperature at the top and at the bottom. As I use shelves method.
I suggest you put up a ladder, eat your wheaties, throw that bitch on your shoulder, and carry it up there. Thats what I did
Me myself and I put that up, 24K BTU