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  1. #1
    Join Date
    Sep 2013
    Posts
    1

    Default Can a PVC furnace exhaust pipe be insulated?

    I live in northern Michigan, where ice dams are a problem.

    I installed soffit vents and added a gable vent to keep the attic cold during winter. Part of the roof also has a ridge vent. (The roof has three gables and a section of shed roof.) My attic is pretty well insulated, and I'm ready to add more this fall. I also plan to add foam baffles to the roof near the eaves.

    I upgraded to a high-efficiency furnace two years ago, and the PVC exhaust pipe goes right up through the roof. Is there a safe way to insulate that PVC pipe to help keep heat out of the attic? I've heard different opinions on this.

  2. #2
    Join Date
    Aug 2007
    Location
    Portland, Oregon, formerly of Chicago
    Posts
    1,583

    Default Re: Can a PVC furnace exhaust pipe be insulated?

    How much heat can a PVC exhaust lose to an attic? It is in a plastic pipe because it is not not!

  3. #3
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    5,081

    Default Re: Can a PVC furnace exhaust pipe be insulated?

    Around here, I have never seen an insulated PVC furnace vent.

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