I'm thinking of layouts for a bathroom reno, and wall space is at a premium. There is an existing recessed hot water radiator along one wall and I'd like to place the toilet in front of it. Because the radiator is in-wall there seems to be enough space behind the toilet for it. The toilet does not touch the wall. I don't see any problem with getting the necessary plumbing to both of them. Is there any problem with this arrangement?