Reusing Old Gas Flue Liner for new Multifuel Stove

marieidat

We're hoping to install a new multifuel stove in an old fireplace that (under a previous owner) held a gas fire. It's still got the flexible stainless steel liner - single skin, 316 grade - which I'm wondering whether, in the sprit of moneysaving, we can reuse?

Looking at the building regs, planning portal and HETAS has confused me, so I'm hoping a knowledgable MSEer could help?


p24 ofthis says you can reuse old flue liner, if it complies with building regs forthe new use, and passes the smoke tests etc. http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADJ_2010.pdf -but that "If a chimney has been relined in the past using a metal liningsystem and the appliance is being replaced, the metal liner should also bereplaced unless the metal liner can be proven to be recently installed and canbe seen to be in good condition."

(so I'll double check the receipts we've got from the previous owner, but Idon't think we can prove it's recent.)

andbottom of p3 here says

"Thereare two types of flexible liners:
- Singleskin liners for use with gas appliances and Twin skin liners, manufacturedfrom overlapping strips of highgrade stainless steel to give a smooth sealed flue-way. These linersshould be used with wood and
multi-fuelappliances. Single skin liners must never be used with woodor multi-fuel applications."

http://www.hetas.co.uk/wp-content/mediauploads/BFCMA-General-Guidance-10-12-12.pdf (sothat seems to say no to the single skin liner, even if it passes smoke tests).

Can anyone advise?
Thanks

Greenfires

It's a definite no. Gas liner is completely unsuitable for any multi fuel stove I'm afraid.

marieidat

Ah okay - thank you. I would have thought gas would need more protection than solid fuel, since if it's gas tight it would have to be smoke tight ? Not sure of the logic but, the regs must be obeyed. Thanks for letting me know.

Greenfires

More to do with higher temperatures and creosote/tar deposits from solid fuel. If the gas liner managed to survive the heat from the fire, then it's highly unlikely it would withstand sweeping hard enough to remove the deposits stoves leave behind.

Anthony_snh

Gas fire flue liner wont be able to with stand the heat from a wood burner, it will distort and then disintegrate. The only way forward is to remove the old gas flue liner and replace it with a twin walled 316 or a 904 liner for your application.