On Sun, 17 Sep 2006 22:33:19 +0100 someone who may be "Doctor
Drivel" wrote this:-

I think you should do your figures on replacing a boiler with a modern
condensing boiler.

You are making the rather large assumption that I have not done so.

As gas prices has risen on one year by 25%

They have done, but it now looks like that was a one off. Indeed the
government customer group is already warning suppliers that it
expects them to reduce their prices in line with the reduction in
the cost of gas they buy.

the figures are overwhelmingly in favour of a new boiler.

As has already been discussed, one needs to allow for the parts that
will fail on a new boiler and thus counteract the savings the boiler
will make on gas. Then one has to look at the installation cost.

There are many reasons to replace an old boiler with a modern one
(and make the changes to the heating system to make it work
properly), but simple payback is not one of them.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54