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chimney liners

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Stan_5
Stan_5 Member Posts: 22
in THE MAIN WALL
I was wondering if someone could help me with a chimney liner question. We are installing a 90% direct vent furnace and pulling a flexible metal liner down an exterior chimney for the water heater. The chimney was relined recently with a cast in place lining system. Does the metal liner need to be installed or does the cast in place lining system take its place.

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  • Tim McElwain
    Tim McElwain Member Posts: 4,625
    edited October 2011
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    What are the interior dimensions

    of the existing chimney? What is the BTU input of the water heater? Is the existing chimney without the liner acceptable to the local inspector?
  • Stan_5
    Stan_5 Member Posts: 22
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    chimney liners

    The existing chimney was 6 3/4 x 6 3/4 inside dimension but because of the cast in place liner its less, maybe at most 5". The water heater is about 40,000 btu's input. I was wondering if the cast in place would insulate the chimney enough so that the water heater could vent into the chimney without a metal liner. I don't know if it would be acceptable to the local inspector or not. I can't seem to find any info on line that addresses this. Perhaps its best to just pull the liner but why do it if it's not necessary. I don't know the height of the chimney, a fellow co-worker asked me about this so I thought I would do some digging for him.
  • PeterNH
    PeterNH Member Posts: 88
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    Liner

    If it's a "Golden Flue" there should be no problem.

    Peter
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