Not exactly to the point of this thread, but something else to think about with dryers. When I was building new houses, I had to design them anyway since a lake house needs two fronts-one on the road side and one on the water side. One thing I always did was put the dryer backing up against an outside wall so it direct vented through the wall, so that no flex hose was used or needed. I expect we all know how lossy flex hose is, and that they always accumulate fine lint from dryers. The wall vent was removable and in a panel that it could be located in a different spot in the future if needed. You could install the wall vent after the dryer was in place.