My understanding was that the vast majority of combi boilers can't be used with solar thermal - IIRC something to do with modulating temperatures – but there are a couple of manufacturers who do make solar-friendly combis. (We're not on gas but I looked into it all before our renovation last summer; we ended up with a wood pellet stove with thermal store, and hope to plug solar thermal in when our finances recover.)
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Date: 2011-10-03 08:17 am (UTC)