insulation around Pellet direct vent pipe

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by houset, Jun 27, 2008.

Thread Status:
Not open for further replies.
  1. houset

    houset
    Expand Collapse
    Member

    Joined:
    Feb 8, 2008
    Messages:
    45
    Likes Received:
    0
    Loc:
    Pennsylvania
    Hi,

    Hopefully someone could answer this for me. I am in the middle of replacing my interior plaster walls that were never insulated with 2X4 studs and R-13 fiberglass insulation covered with Drywall. On the insulation warning label, it states that the insulation should not be installed around a metal chimney. My question is does this really cause a problem? I clearly don't want to create a fire hazard, but i can't imagine that the double wall pipe would get hot enough to cause a potential fire hazard. If anyone here has thoughts, let me know.


    Thanks
    Todd
     

    Helpful Sponsor Ads!





  2. jtp10181

    jtp10181
    Expand Collapse
    Minister of Fire

    Joined:
    Feb 26, 2007
    Messages:
    3,729
    Likes Received:
    3
    Loc:
    Madison, WI
    All clearances on pellet or wood chimney pipe is an air space clearance and must be air space. Insulation will trap heat and could result in the pipe getting hotter than tested for elsewhere. Over time this could cause combustibles to dry out lowering thier ignition temperature and eventually igniting.
     
    Collapse Signature Expand Signature
  3. houset

    houset
    Expand Collapse
    Member

    Joined:
    Feb 8, 2008
    Messages:
    45
    Likes Received:
    0
    Loc:
    Pennsylvania
    So i guess my followup question is how much clearance from the insulation is needed? 6 inches, 12 inches? Basically my pipe will run through the wall, so are you saying that when i look at the pipe going through the wall, i need to see daylight all around it to prevent a fire hazard? That seems a bit extreme.
     
  4. Jerry_NJ

    Jerry_NJ
    Expand Collapse
    Minister of Fire

    Joined:
    Apr 19, 2008
    Messages:
    1,052
    Likes Received:
    21
    Loc:
    New Jersey USA
    When a pipe passes through a wall, or ceiling, any surface, it must have the appropriate sleeve/adapter/whatever...don't know the "legal" name. That's what I think and have seen.
     
    Collapse Signature Expand Signature
  5. hoverfly

    hoverfly
    Expand Collapse
    Minister of Fire

    Joined:
    Jun 26, 2008
    Messages:
    550
    Likes Received:
    17
    Loc:
    Southern NH
    You need a wall thimble.
     
    Collapse Signature Expand Signature
  6. jtp10181

    jtp10181
    Expand Collapse
    Minister of Fire

    Joined:
    Feb 26, 2007
    Messages:
    3,729
    Likes Received:
    3
    Loc:
    Madison, WI
    You should use the approved wall thimble for your venting system. It will normally force the required clearances and also fill the gap with metal so you don't see daylight. You can use a black silicone caulk where the pipe passes through the thimble.
     
    Collapse Signature Expand Signature
  7. houset

    houset
    Expand Collapse
    Member

    Joined:
    Feb 8, 2008
    Messages:
    45
    Likes Received:
    0
    Loc:
    Pennsylvania

    This is exactly what i was looking for. Thanks guys..
     
Thread Status:
Not open for further replies.

Share This Page