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mark_mc
you could use a triple coil cylinder albion do one called a eco cylinder and they are a good job available in 50x18 and 60x18, i installed one with a oil boiler, wood burning stove and solar.
the dunsley things are ok but would do it with a thermal store its a far better install option i know its cheaper the other way.
the dunsley things are ok but would do it with a thermal store its a far better install option i know its cheaper the other way.