Thanks both for the posts.
Robl, I read your pdf for your gshp build, very impressive! The nearest commercial product is called a hotspot and is an additional heat exchanger to put tin the refrigerant loop to pump heat to a cylinder. I guess that retains the ability to dump heat to atmosphere once the cylinder is charged.
Nihaomike, I like your thinking, engineers always jump straight to engineering..! I’d also read that solar panels reduce the extent to which the building warms up, so I’ll stick to that part of the plan too!
Thanks again
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