"Tony Bryer" wrote in message
...
In article , Set Square wrote:
Even Drivel didn't say you'd get a 40% saving on gas - he said *up to*
40% -
which is a bit different - and grossly optimistic at that unless you've
got
a literally 'stone age' boiler.


The OP's description was "a fifteen year old rarely serviced (probably
never
since new)" boiler so the new boiler may well save 40% on the present gas
usage. But servicing the existing boiler might produce a double-digit
saving.

I have a 24 year old boiler that's 84% efficient so it would take ages to
get the costs of a new one back.
There is not a lot to service either, just vac it out occasionally and check
the flame is burning OK.

Were other boilers of that era significantly different?


PS. Can I move it to a new location if I build an extension or do I have to
fit a new condensing boiler?
Its only 50,000 btu so I might just keep it as a water heater (storage) and
run the heating off a new one
(in the attic?).