"Peter Parry" wrote in message
...
On Sun, 02 Jul 2006 22:50:09 +0100, David Hansen
wrote:

On Sun, 02 Jul 2006 21:45:19 +0100 someone who may be Peter Parry
wrote this:-

One could, it makes very little difference however.

That depends on how well the house is designed for natural
ventilation.

It is quite possible to design houses for natural ventilation,

It is quite possible to design a house to use Mechanical Heat and Vent using
a 40w fan motor. Have high thermal mass (masonry), superinuslation all
around that, eves overhangs for shading of windows and walls and forced air
coming in from the north side. It makes a nice cool house in a UK climate.
No need for expensive to buy and run a/c units.