On Tue, 19 Aug 2008 08:54:03 +0100, Steve O'Hara-Smith
wrote:

Then there are ice dams in winter.

Also too used to mild winters where below freezing is rare.

OK, for people in your type of climate, the reason against using the attic to
pre-heat domestic water is to limit air-conditioning costs. The money you save
on hot water by using the attic to pre-heat it is more than cancelled out by the
extra money you spend on AC, as compared to what you could have saved by
passively venting your attic.


Robert Scott
Ypsilanti, Michigan