On Tue, 21 Sep 2004 11:29:06 +0100, Pete C
wrote:

On Mon, 20 Sep 2004 10:25:39 +0100, Malcolm Reeves
wrote:

A condensing boiler with its lower flue gas temperature is much more
likely to accumulate fumes at low level (that's why they plume after
all). The advice on siting says to take account of the plume
possibility. My flue will face my neighbour. Do I want to risk the
possibility I might be dropping smelly fumes into his garden (and over
his washing line). For, perhaps GBP20 pa when I won't break even on
the boiler costs for 10yrs. NO.

Hi,

Why not make a stainless flue gas heat exchanger for a conventional
oil boiler, and use the low grade heat for UFH/HRV/DHW
preheat/kickspace heater?

Cos I'd need to convince Building control it was ok and given that
boiler is already about 90% efficient that only leaves 10% to get.
GBP40 pa tops. Not worth the effort. I could probably save more
shopping around for oil, improving insulation etc. It would be a very
risky endeavour with unknown gains.

I'd expect oil to increase in price over inflation in the next 10
years, this will speed up the payback on any up front investment.

Why? The US is wedded to the car. They drive everywhere and the
layout of their shops support that. If oil was more expensive so
would be US petrol. A much as I think they should pay more for petrol
to cut down their emissions I don't see it happening. Plus the last
time the Arab states hike petrol prices the world went into recession
which hit them too. Now they adopt a balancing act to get the biggest
income, that is the middle ground between cheap oil - large sales and
expensive oil - low sales. So why should oil increase in price? It
might fluctuate some, but that's all.


--

Malcolm

Malcolm Reeves BSc CEng MIEE MIRSE, Full Circuit Ltd, Chippenham, UK
, or ).
Design Service for Analogue/Digital H/W & S/W Railway Signalling and Power
electronics. More details plus freeware, Win95/98 DUN and Pspice tips, see:

http://www.fullcircuit.com or http://www.fullcircuit.co.uk

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