"The Natural Philosopher" wrote in message
...
Terry wrote:

Another problem that can arise with
very high levels of insulation and a
well sealed house, is large amounts
of condensation.

Correct ventilation cures that.

Very interesting stuff, but of course
in teh UK we don't get that much
ultra cold waeather, and teh cost
benefit of such a system as described
below is not as great, if indeed it exists at all.

What tripe! Look at what Gorki Deveci has been doing in the UK.

I keep harking back to teh mediaeval
castle,

That is because you are ancient.