Based on Doc's comments about my desuperheater thread, and other aspects, I've started to rethink my geothermal setup. Considering my house currently uses hydronic baseboard heating (currently using an oil boiler) across all three floors (2nd story, 1st story, finished basement) and ducted central air (2nd story, 1st story), I'm now instead considering the Hydron Cruise Variable Speed Water-to-Water unit... anyone have any experience with these types of units? Per Doc's idea, this unit could also produce domestic hot water for us in addition to the heating and cooling. Seems like a truly all-in-one solution. We would put an air handler in the conditioned attic (ceiling close cell spray foamed) and use the existing ductwork for cooling. While the ductwork could be improved, we're in Massachusetts and cooling is definitely the less critical aspect of our climate control. I would replace all existing baseboards w/ low temperature baseboards. The Hydronic Heating Technologies Inc. Eco-Con caught my eye, but I see there are a number of other brands too. I'm sure I'll need to do some math on if I can do a one-to-one (i.e. linear foot match) swap out of the existing baseboards w/ the low temp ones. I expect this also depends on outputted water temperature and flow rate. All that said, does anyone have experience w/ low temp baseboards? If so, on average, do you find you need more or less linear feet of low-temp baseboards to cover the current heating load? This really seems to be a great solution for those who currently use hydronic heating w/ typical baseboards and want to go geothermal. Thanks for reading and cheers.