this post was submitted on 17 Sep 2025
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Yeah I already had the hydronic floors and ran numbers on heating the floors off thermal solar panels, propane, heat pump, and the resistive boiler. The thermal panels made the least sense because they are useless eight months of the year.
The heat pump might have worked but when I really needed it my semi-outdoor closet would be in single digits and full of water supply pipes so the heat pump would be least efficient when I needed it most, and would not help keep the closet warm.
The resistive boiler meant I could add a bunch of panels to run it during the day and get the floors up to 85F, then run all electric appliances with no worries during the day the rest of the year with the extra capacity. So instead of being net positive generation from 10am to 4pm in summer, its now 8 am to 6pm with way more than I can use at peak.