On 10/08/2014 21:44, John Rumm wrote:
Was looking at possible positions where someone could site a new
boiler... There is a nNice space on the wall in the kitchen which would
be ideal (above where the old floorstander boiler is currently fitted).
However there is a partially removed chimney breast on the outside of
the wall that is in the place the flue would normally exit. (its
corbelled out from the wall about 5' off the ground, and then continues
up to a normal chimney stack).

So I said that they would probably need to have an extra extension in to
boiler flue to run half a meter to the side in the kitchen first, before
turning and exiting the wall in the normal way so as to miss the old
chimney stack.

That got me wondering though, although it does not seem "right" I can't
put my finger on any rule for not sticking the normal flue right through
the old stack - its completely unused and only about a foot deep. Can
anyone think of a reason?


Try and download boiler installation manuals. They will tell you the
flue requirements.


--
Michael Chare