Flue liner or not?

[namsag]

Salt glaze different from brick at very least if i had done what you done i would have fitted a terminal also.
I would say the book has not caught up with these type of fires and how they connect into existing salt glazed /lined chimneys , But i would also have spoke to the dog aswell as to manufacturers

 

[heatingman]

Corgi did an article a couple of issues back. Its a dfe gas fire, just a funny shape.