I framed in the walls of the boiler room in the basement. I did this now as the plumber needs the additional wall-space for more of his radiant pipe manifolds. Usually he'd just strecch them along the foundation wall, but I wanted to condense the space committed to pipes (takes away from model train space!), so I asked him to use the boiler-room wall instead. Eventually I'll sheetrock the outside of this framing, isolating all the heating equipment inside a kid-proof room.