On Sat, 1 Oct 2005 15:57:28 +0000 (UTC), John wrote:

Heat lost "into" the house is not really lost is it?

Not in my book but do the boiler efficiencies take that into account?
They must simply take energy in and energy out via the pipe work. It
would be very difficult to account for losses via the casing and flue
as they would be totally dependant on where the boiler is located.

--
Cheers
Dave. pam is missing e-mail