Not seem thatIn article ,
T i m wrote:
The problem with a back boiler is that it pulls in hot air from the
room and shoots it up the chimney - to be replaced with cold from
outside. Which was known to be inefficient long before condensing
boilers arrived. Hence balanced flue boilers which have been around for
many a year.

Hmm, good point .. didn't some boilers require an input duct so they
do actually collect their input air from outside (like a balanced flue
jobby) though?

Not seen that arrangement with a back boiler - although I suppose it's
possible.

I admit the front fire would still consume room air and
send heat into space ... but wouldn't the exhaust gasses (back boiler
and front fire) give some of their heat to the chimney breast /
internal stack and hence to the house on their way out (where a
balanced flue wouldn't)?

Yes - some 'flue heat' won't be wasted. But the majority will. ;-)

--
*If work is so terrific, how come they have to pay you to do it?

Dave Plowman London SW
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