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Running Return Pipes Inside Fintube Baseboard?
I recently looked at an older home retrofitted with new(ish) fin tube baseboards, in which the installer brought both supply and return in at one end, supplied the fin tube, and ran the return back to the starting point with the return pipe resting on the fin tube, in the enclosure. Is this kosher? It seems like the pipe must be decreasing the heat emitting ability by partially obstructing the fins. Although I'm not sure running it along under the fin tube would be much better. obstruction is obstruction. He was obviously only wanting to have the vertical pipe runs furred in at one spot (they are on the second floor). I also have serious doubts about whether he took into account water temperature drop when he strung several together in series. Any thoughts?