On Thu, 8 Sep 2016 21:57:08 +0100, The Natural Philosopher
wrote:





What did they suggest you needed?!

normally double skinned insulated stainless steel Easily a grand,
installed.

Stoves are less.

Ah the mythical insulated stainless flue liner again
...;-)

Nothing mythical about it. That's what I installed. BCO insisted.

Obviously you are ignorant

http://www.flexifluedirect.com/index.php?cPath=24_58

You are getting like Harry in that you think there is only one
solution to things and that your view is the sole right one even when
you are wrong.
Your BCO would have asked for an insulated flue system because you
were a new build, now study the flexible flue liners that are on the
site you gave a link to under the section chimney liners , you will
see two types 316 for wood burning only and 904 which is for
multlifuel burners. These are not insulated liners , they are
permitted to be installed in existing chimneys such as may take place
when installing a stove in place of an open fire place where it is
often impracticable to demolish an existing chimney flue to get a
straight sectional insulated one in, not that you need one in this
circumstance.
If the chimney flue is a small one in good condition then that may be
enough, if it is a large one such as may be found in a large old
farmhouse or the chimney is in poor condition then a decent installer
may add some insulation external to the flexible liner such as
filling the void around it with vermiculite, again on the very link
you gave you will find this under the section Installation
AccessoriesChimney insulation materials.
In truth if an existing chimney is in good condition then it is not an
absolute requirement even under the part J building regs to have a
liner at all but most Hetas installers prefer to fit one to ensure the
regs are met in all conditions, but if a smoke pellet test shows
adequate draught and no leaks form the existing structure they may
write out the Hetas certification, chimneys that are already lined
with concrete sections or pumice components are better candidates for
not needing any more liner.


Now stop being like Harry and thinking you are right all the time
just because you two had a love affair over the Brexit campaign.



G.Harman