In an earlier contribution to this discussion,
Adrian C wrote:


If it actually comes to *needing* replacement, then we will have to.
If it seems the 40% saving on gas will neatly pay for the seem to be
required breakdown cover and future ongoing repair/replacement costs
of the new fangled wotsit, then frankly i'd much rather stick with
the cast iron lump.

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. As long as the 'iron lump' can be restored
to reliable operation, stick with it - by the time a new boiler has paid for
itself in fuel savings, *that* will need replacing.
--
Cheers,
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