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Choice of solar direct coil or Open vented ports on my Gledhill Sol Thermal store. I'm hooked up to the Solar coil at present but it is low in the store. Me I just thought heat rises, but the OV boiler ports are nearer the middle where CH flow comes out of the store, so get that part hot...

Hullo chaps first post, looks like some good knowledge here; some advice please. In the deepest wilds of the back of beyond where plumbers fear to tread I have a house with the following set up: 16KW woodburner sends 12kw of heat on a good day via gravity fed open vented 28mm pipes to a 300L...