Well that didn't work out too well. The little unit puts out 4 times as much heat as cold air. The 6" ducts heated up like oven elements. I haven't cut the soffit yet, making sure this was going to work first. I just jammed the duct down in the soffit and hot air was blowing back a little. The room heated up to 94' in a few minutes so I abandoned the project to regroup. I either have to decide to cut out the soffit or put it in the window. Right now the windows are covered with plywood painted black so it looks dark inside all the time. No light escapes at all. I'll have to cut a square hole then light will leak.