Jeff, this is exactly why I built my first PVT panels a few years ago. The real issue now is the amount of equipment needed to do the job. As we reduce our heat load, the equipment can make sense but still, there is a lot of piping, pumps and storage to put in. Economics come in to play so we found that the best is to do pool heating with it (so far). Using it with a heat pump was always on my mind though.
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