my chimney has oval clay flue and exterior chimney. To get a 6" ss liner insulated through the damper area. I know I have to remove damper. What about the smoke shelf? Can I remove parts of it?
Possibly a little. What would be the clearance with just the damper removed?
I think you would be ok to take out a brick or two to make the 6" clearance for the liner.
View attachment 116365 Most of the time you don't need to do that. Angle the liner at the smoke shelf and use a stainless fixed elbow coming off the top of the stove.
Mine is that same way.
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