D
Doggit
Fair enough if they've been at it for a few years, but trying to refit the connector and stove pipe still gives me concerns; and fitting a different cowl also raises questions. And although they've been back a few times, if everything had been done properly, then you wouldn't be getting smoke in the bedroom, so they've got to keep coming back until it's fixed. It could be worth getting in touch with HETAS, not to complain about them, but to see if someone's got some better suggestions for them to try.
The chimney flaunching shouldn't be a problem, so I wouldn't disturb it, and if there are bricks missing between the flues, then the liner would have overcome that, so no need to go down that route either. The liner could have been damaged when it got pulled down, but you won't know till it gets replaced. It might be worth adding vermiculite if a new liner goes down, but only as long as there's no danger of damp wicking across it.
Best of luck.
The chimney flaunching shouldn't be a problem, so I wouldn't disturb it, and if there are bricks missing between the flues, then the liner would have overcome that, so no need to go down that route either. The liner could have been damaged when it got pulled down, but you won't know till it gets replaced. It might be worth adding vermiculite if a new liner goes down, but only as long as there's no danger of damp wicking across it.
Best of luck.