Size of Gas Boiler ?

Poulgorm · 27-09-2013 09:49AM #1

My son has bought a detached 3 bedroom house, about 35 years old. Double glazed, about 6 inches of insulation in the attic, probably no insulation in the walls. BER rating D3.

The house area is modest - at a guess, 1250 sq ft.

The plumber intends to install a 35,000 BTU gas combi boiler. Is this adequate? Seems a bit small to me.

What would you recommend ? Thanks, in advance

corkgsxr · 27-09-2013 10:19AM

Unless im thinking wrong about house size that seems huge. 24 or 28 would be plenty.

But he could be going bigger for hw output.

Over 35kw is nearly commercial outputs

Poulgorm · 27-09-2013 12:49PM

Sorry - my fault - I should have said 35,000 BTU - I have edited it now.

scudo2 · 27-09-2013 04:10PM

35,000 = 10.26 kw
Way to small I'd recommend 26 kw min.

10kw = small/ tiny granny flat

Something wrong somewhere !

I reckon he ment a 35kw boiler, especialy as its a combi . 35 would be right in my humble opinion.

To convert BTU to KW devide by 3412

Kw to BTU X 3412

27-09-2013 06:55PM

Poulgorm wrote: »

My son has bought a detached 3 bedroom house, about 35 years old. Double glazed, about 6 inches of insulation in the attic, probably no insulation in the walls. BER rating D3.

The house area is modest - at a guess, 1250 sq ft.

The plumber intends to install a 35,000 BTU gas combi boiler. Is this adequate? Seems a bit small to me.

What would you recommend ? Thanks, in advance

As above, I think you may have made a mistake as i'v never seen a 35,000 BTU combi.

JohnnieK · 27-09-2013 09:56PM

Your going to need at least a 30kW combi for a house that size. Especially if it has a bath and an ensuite too.

I put in a 35kW in my own house in May, We use the bath a good bit and it fills it in no time.

we also have an ensuite. I would have gone for a 30 nut I got the 35 for free:cool:

Size of Gas Boiler ?

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