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Gray0689
Thanks Pipes Plumbing and AWheating. Solar will contribute in autumn and spring but not for around 10 weeks in winter as the sun disappears behind a mountain ridge to the south. We're aware we won't need a lot of input from the solid fuel, hence designing the heat exchanger into the cook stove rather than space heating, because it will only be run for short periods.
Just out of interest where you doing this?