chimney liner and ventalation

[ttclark]

I'm intending to fit a flexible chimney liner and stove. I've read many articicles but one thing puzzles me. All the articles say or infer that the brick chimney is sealed - sealed at top by closing plate and bottom by registry plate. But what happens if say the joint between the flue pipe and liner is faulty and carbon monoxide leaks into the chimney? The gases would accumulate in the chimney and probably seep through the brickwork. Surely an opening at the chimney stack to release gases would be advisable.

[htg engineer]

The flexible liner will be one continuous run, the only joints would be onto the appliance (must be accessible) and to the terminal/cowl (accessible and outside)


htg

[ttclark]

Yes, as you say there is at least one joint above the registry plate, and where there's joint there's a possible leak!

[htg engineer]

No there wont be, the joints will be accessible.

[ttclark]

There won't be what? Just because a joint is accessible doesn't mean it won't leak. And the liner-fluepipe joint is above the register plate so is not readily accessible.

[htg engineer]

'There won't be what?'

ANY JOINTS, if YOU don't put any joints between the register plate and the closing plate then there wont be any joints. You're installing it, if the stove flue is 1 meter long put the register plate at 1100mm, if it's 500mm long put the register plate at 600mm = no inaccessible joints. It really is as simple as it sounds.

Look at the project section, there's a piece about installing a flexible flue liner.

'Just because a joint is accessible doesn't mean it won't leak'
ok but it's been done for donkey's years.

If you're worried about joints leaking scrap the stove idea and go for a room sealed boiler - Sorted.

[ttclark]

Right, I get your meaning now - all other articles I've seen put the connector ABOVE the register plate. Thank for your help.