On Tue, 16 May 2006 17:39:46 +0100, "Mary Fisher"
wrote:


"Peter Parry" wrote

I'd be interested in seeing any. The only mentions I have found are
unsubstantiated statements usually made by peddlers of solar
fittings.

You haven't given any evidence of your claims.

That turning boilers off for weeks or months on end causes harm? Ask
your local plumber. Failing that look at the pattern of repairs that
one user of this group who fixes such things by the thousand has
reported in the past - each autumn the spares consumption increases
dramatically as boilers come on after summer and pumps, valves and
PCB's fail.

If you want a more academic treatise Failure Modes Effects Analysis
by Palady discuses failure modes effects and criticality. Shafts
bind to bearings if not used - Machinerys Handbook (every edition
since the beginning of the last century).

It is simple basic mechanics. There is ample evidence that lack of
use shortens life and causes harm in devices such as boilers. There
is none at all that not using them for some months every year does
them good or extends their working life.



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