Looking into a Lopi wood burning insert. My supplier says I don’t need an insulated liner because the chimney has no exterior wall. Of course, once it goes above the roof, all walls are exterior. Thoughts?
Is an insulated liner always recommended?
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That is not the determining factor. The clearance of the chimney structure from combustibles is. An interior chimney needs 2" clearance all the way up, an exterior chimney needs 1". If the interior chimney has 2" clearance then the clay liner also needs to be in good condition, no cracks, gaps, etc. If flawed, insulate the liner.
Ctwoodtick
Minister of Fire
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