"Peter Parry" wrote in message
...
On Thu, 24 Nov 2005 05:12:38 +0000, David Hansen
wrote:

On Wed, 23 Nov 2005 18:01:06 +0000 someone who may be Peter Parry
wrote this:-

Solar water heating has no advantages at all over any
other form of water heating,

Really. So not burning gas or electricity and thus reducing
greenhouse gas emissions is not an advantage?

No, because it is trivially insignificant. If every house in the UK
went to solar water heating tomorrow it would have a negligible
effect upon world greenhouse gas emissions.

But a hell of lot locally. Imagine London full of solar panels on every
roof. The air quality would rise substantially. If the roofs were full of
PV panels then even more.

If regs are introduced to implement solar then prices will come down and
everyone benefits and many ways.

Indulging in posture
politics and switching off brain as soon as "global warming" is
mentioned simply distracts from the real problem which isn't in the
UK or capable of being solved by the UK.

You are burying your head in the sand.

Not running a boiler all the year round is not an advantage?

No, because the solar supply is unreliable - you still need
conventional water heating available. If you switch off the boiler
for the summer and rely upon a daytime immersion heater for the times
the solar water heating is inadequate the small saving it makes is
wiped out in a few days.

Nonsense. Over the whole years solar may produce substantial heat, and who
in their right mind used an electric immersion when cheaper oil or gas is
available.

as well as making no economic sense is visually unattractive

I suspect we are getting to your real motives now.

Try not to be a prat all your life.

That is right. Do you occasionally have a day off?

Do you think that
a panel built into a roof www.imaginationsolar.com is unattractive?

Actually, yes, nearly all the examples shown are pretty awful. Not
all roofs are dull grey.

Panels from gutter to apex look good.

Solar water heating will never make sense in the vast majority of
situations in the UK.

As others have said, mass production and installation in new
buildings will even change the economics.

Possibly, but we are talking about retrofitting today - not built in
tomorrow.

If it is DIYed using Navitron panels, then it IS viable.