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  1. #14
    Join Date
    Aug 2007
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    I think the installation instructions require insulation. The chase is in a chimmy that runs up the side of the house about 30 feet .

  2. #15
    Join Date
    Mar 2005
    Suppy NC
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    one other reason for insulating at least the exhaust pipe in an uncodition space

    even if frezing doesnt happen the cold air is denser and harder to push
    the induce may have a harder time to move that colder air up and out
    and experience a nusience pressure switch lock out till it pushes the colder air out. with insulation on the pipe the air will be hust a little warmer and not as hard to remove. this is just my opinion only

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