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Plumbing

Boiler Advice - difference of opinion

Anonymous user 09/03/2024 - 2.57 PM

Do i need a bigger boiler? Currently have a Baxi heating system- 18kw. Having an extension to the house meaning we will have 11 radiators. Advise from British Gas is that this should be sufficient. However, had quotes from plumbers saying we will need a 30kw. Unsure on what to do

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1 Answer

Duval Heating

Rating: 5 out of 5

Ipswich

Hi Jpinder When working out the size of boiler you need a rule of thumb is single rads + 1kw and double rads + 2 kw. So if you 11 rads are all doubles then you have a 22kw load. The hot water tank depending on size is normally around 5kw + or - On previous jobs of mine 11 rads and hot water tank would normally be a 25kw boiler unless all the rads are extra big. Hope this helps Steve Duval

Answered6 June 2018