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What size boiler do I need for 8 radiators?

As an estimate of the smallest apartments, apartments and houses, with up to 10 medium sized radiators and 1 bathroom will require a combi 24-27kw boiler. For an average house of 3-4 bedrooms with up to 15 medium sized radiators, 1 bathroom and a bathroom en suite, a combi 28-34kw boiler would be installed.

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