Just want to clarify my point regarding 'deficient' chimneys.
Liners improve a chimney that is structurally sound.
They may just be an old unlined brick flue or a massive single chimney without separate flues for each appliance.
Structurally deficient chimneys are not fixed with a liner.
Coal fired devices run at relatively low temperatures.
We are discussing coal not wood fired devices.
Chimney fires are not an issue, unless you never cleaned/inspected the chimney as a wood burner.
Every situation is unique there is no 'one size fits all' solution.
If you are unsure/uncomfortable/unable consult a professional for assistance or a second opinion.
We all make mistakes and learn from others.
Remember the earth was once flat and the sun revolved around us!
The advise given is in context with the thread specific question.
In this case:
I figured I would ask you guys. I have a masonary chimney, with a 8x8 clay tile liner. My intention was to put a damper seal kit in my existing fireplace and run the coal stove pipe thru it into the chimney. I was told by a company rep where I was buying this damper kit from, that it was going to destroy my chimney if I didn't run SS flue pipe all the way to the top.
Sales pitch to someone that is uninformed, or is this fact?
I am not an engineer, train or otherwise!
I am surrounded by people who have stamps and extra letters at the beginning and end of their names.
I stay at a Holiday Inn at least once a year!
Most of all I do have common sense and a practical application of logic.
Oh, add humor, on the dry side, along with a wee bit 'o sarcasm.