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What size boiler do I need for 6 radiators?

As an approximate estimate of most smaller apartments, apartments and houses, with up to 10 medium sized radiators and 1 bathroom, you will need a Combi boiler from 24 to 27kw. For an average size house of 3-4 bedrooms with up to 15 medium sized radiators, 1 bathroom and a private bath, a Combi boiler of 28-34kw would be installed.

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