On Mon, 15 May 2006 12:21:18 +0100, David Hansen
wrote:


Economically solar water heating is still a long term investment, at
current fuel prices.

Actually it is a long term non-investment as in most cases, and all
commercially installed and maintained systems, it will never even
break even.

There are also other advantages, such
as being able to largely turn the boiler off in summer and thus
(probably) prolonging its life.

There is no evidence that this is the case at all, and in all
probability it will almost certainly reduce its life as seals and
bearings in pumps and valves really dislike being unused for months
on end and corrosion will also worsen.

Environmentally solar water heating is an excellent investment.

In propaganda.


--
Peter Parry.
http://www.wpp.ltd.uk/