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How many kW boiler do I need for a 3 bed house?

Most flats, apartments and smaller houses with up to 10 average size radiators and 1 bathroom will need a 24 to 27kw Combi Boiler. A 28-34kw boiler would be installed in a 3-4 bedroom house with up to 15 average size radiators and 1 bathroom.

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