Lloyd, It will probably be fascinating to hear how this is effective for you. Provided that the output temp received’t recover from 140F I feel, I’ve heard you may have to repipe radiators so each operate straight from a manifold instead of in series. River Property has a sizable lake https://commercialheatpumps85936.blogs100.com/23951881/the-smart-trick-of-water-source-heat-pumps-that-no-one-is-discussing