Any advice on log burner flues?

23 Apr 2013
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United Kingdom
Can anyone help me?

My wife and would dearly love to have a log burner installed in our living room (see pic) and I have had 3 different quotes for the installation of one and it seems the more I learn the less I understand. For a bit of background, I live in a house built in 1988 with an existing gas fire and a concrete or clay lined flue (im not sure which). The visits went thus:

Company 1 said I needed a liner but the 5 inch flexible pipe wouldn't be able to negotiate a tight bend in the flue about 3 meters from the ground without some brick being done to the chimney - which he didn't do and therefore prevented him installing a stove. End of the road there...

Company 2 said I also needed a liner but this was an easy process, he could do the brickwork modifications for £130. Unfortunately this company was very unprofessional in a number of areas and also suggested putting in a 6.5 Kw Aga Ludlow stove in a 4.8m x 3.4m room (which we believe would be massively more powerful than required).

Company 3 said I didn't need a liner as the concrete flue was sufficient, the chimney was external to the property and only connected on one side and that anyone that had said we needed a liner was talking nonsense.

I simply don't know what to do. All 3 companies are on the Hetas register - I have actually checked that myself. As I understand best practice these days seems to be to install a liner - but I have read things suggesting that it is the decision of the Hetas installer and in modern buildings with concrete flues, a liner isn't really needed.

If anyone can through advise me I would be most grateful as I don't think I can see the wood from the trees any more!

Kentish Lad
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A tin liner will last about 20 years then its time to replace it.

If your flue has any leaks and tar starts manifesting itself on the walls in a few years then you will probably blame your installer for not fitting a liner.

I'd sooner tear my chimney down if it didn't pass a smoke test and re build it and have a solution that will last over 100 years.
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OP... Is your flue an 8 inch round concrete liner?

5 inch liner is too small and a 6.5kW stove is too large.... even a 5kW is too large but a least you don't need ventilation... Just stick one log on rather than two

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