Well that can't be measured very easily then. Figures would have to be
established on each side of the house and maybe the bisecting angles in
between. Now who knows which way the wind blows and for how long and the
answer is:

A big ****ing guess!

"Rod Speed" wrote in message
...

Gymmie Bob wrote in message
...

missing one big factor there.

Nope, its only a small factore.

If there is no pressure difference the leakage is zero.

Yes, but there usually is a pressure difference. The only time
there isnt is when its dead calm outside and that isnt that common.

wrote in message
...
Abby Normal wrote:

In sealed homes, built to Canadian Codes, probably 40% of the heat
loss
would be infiltration.

A 2400 ft^2 house built to the Canadian IDEAS standard would only leak
2.5
cfm.

To be realistic, 400 would have to be conductance only

Are you talking about igloos again? :-)

Nick