I'm planning on putting a mini-split in an upstairs bonus room. The indoor units are designed to be mounted high on the wall. My bonus room is long and narrow with the long walls starting to vault at 5 foot up. I planned to have the indoor unit mounted in the center of the room for more even distribution but that would mean it would be sitting at 5 feet. Would that be ok or would I be better off mounting at the end of the room where I could have it higher up (7.5 feet)?