Insulate chimney liner in prefab chimney

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nawtyflier

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Nov 28, 2011
13
Raleigh NC
I'm installing a Lopi 1750i into my Majestic ZC fireplace. The chimney is a 8 or 9" metal chimney in a wood chase. Probably a 28 ft chimney and chimney is interior through first and second floors and attic. I plan on installing a 6" flex SS liner as well. The insulation kit adds $250-300 to the install and I'm wondering if it is really necessary. I believe this existing chimney (circa 1982) is rated to 1600 degrees, so will the insulation really provide that much additional performance to my system? I don't see any safety concerns by omitting the insulation.

Thanks all for your answers
 
I have a very similar install as you are talking about. I had a hard time just putting the 6" liner inside the zc liner (had a 30 degree bend) and I think it would be impossible if you wrapped it with insulation. I know everyone will say "insulate" but since it is interior I just don't buy it. My insert is working just fine.
 
Before assuming anything I would examine the existing flue to determine exactly what pipe was used, whether it was safely installed and what condition it is in.
 
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