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Posted by M.P. Android on April 1, 2009, 2:01 pm

And, IIRC, there is an indoor air pollution effect when you get so well
insulated you're living in a big Thermos bottle.  Some systems I remember
from the Great Oil Shortage used an air exchanger that heated incoming
fresh air with outgoing stale.  With, of course, the usual losses.
Entropy's a bitch.

Email on polite request in newsgroup

Posted by Eeyore on April 2, 2009, 9:57 pm

"M.P. Android" wrote:

They're about 80% efficient now IIRC. I designed such a thing 30 or so years
ago. In the UK ( EU ? ) 'condensing boilers' or furnaces as you'd call them
maybe must be > 90% efficient. Some are close to 100%.

Yes, you need some fresh air. Most important.


Posted by Eeyore on April 2, 2009, 9:55 pm

RF wrote:

Insulation is amazingly cheap. Best designed into new build of course. I recently
came across a new type of building block on a UK architectural program which uses
a form of  'foamed' solid which with its extra trapped air reduces heat losses /
gains for example. And new wall treatments can add extra insulation to old build.
And none of those are expensive.

New types of glass can maximise solar gain or reject it, depending on your

Generating so called 'green energy' is actually very ungreen as it's energy
intensive. Better to tackle the problem at source. It always is rather than spend
money on 'band-aid' technology.


Posted by me on April 1, 2009, 6:37 pm

Ok thanks

I do agree with you but was curious abt
"how much"

Posted by Eeyore on April 2, 2009, 10:00 pm

me@privacy.net wrote:

A good energy specialist should be able to calculate the optimum insulation for
any building based on energy rates and the owners' demands. Heating remotely
located homes here in the UK using ground heat pumps which have a COP of around 4
is increasingly popular now.


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