Capitol wrote:

Before you embark on a load of misleading figures. The efficiency of a
25 year old boiler is likely to be around 55% efficient. Like the one
I just got shot of.


1973, Ideal Standard efficiency, 76%

If you wander through the SEDBUK database, there are very few that are
as low as 55% (39 models out of over 3,300 listed - mostly poxytons).

There are a few hundred at 65%, but the vast bulk are 70% or better.

--
Cheers,

John.

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