What size boiler do I need?
As an approximate estimate of most smaller apartments, apartments and houses, with up to 10 medium radiators and 1 bathroom will require a Combi boiler from 24 to 27kw. For an average house of 3-4 large rooms with up to 15 medium radiators, 1 bathroom and a private bathroom, a Combi 28-34kw boiler would have been installed.
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