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Triple wall stove pipe?

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by suprz, Sep 26, 2012.

  1. suprz

    suprz Member

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    At the fireplace shop today, (ordering touch up paint for the jotul) i asked the owner about chimney pipe and he only installs triple wall stainless pipe. I have never heard of this type. He said it only has air gaps between the pipes, no hard packed insulation. He said it is rated up to 2500 degrees. Does anyone here use anything like this? He didnt tell me the name of the pipe company though

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  2. firecracker_77

    firecracker_77 Minister of Fire

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    Triple wall is commonly used, especially going through attic spaces and as the top section of the chimney through the roof. Remains cooler to the touch than double or single and is code in many installations.
  3. firecracker_77

    firecracker_77 Minister of Fire

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    Expensive per foot and not needed for the full length of most chimneys. I use double and then triple in the attic and out the roof. Much pricier given that it's stainless.
  4. corey21

    corey21 Minister of Fire

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    Triple wall keep gases hot and it is code.
  5. begreen

    begreen Mooderator Staff Member

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    Triple wall is not required and not code that I know of. Class A, UL 103 HT and ULC S604 (MH7399) are the required ratings. There are thousands if not millions of installations done with good quality refractory insulated double-wall pipe. Our house being amongst them. An example would be DuraVent's DuraTech (double wall) as compared to DuraPlus (triple wall). Both are rated UL 103 HT, yet the double-wall is the slightly more expensive product with a heavier gauge inner stainless wall.
    ScotO likes this.
  6. FyreBug

    FyreBug Minister of Fire

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    I heard triple wall is not as effective as double wall. Is that correct? Is there any downside to triple wall?

    In Canada, triple wall is not allowed in any installations.
  7. ScotO

    ScotO Guest

    I was under the assumption that triple wall would be phased out to class A insulated pipe. I've been wrong before. As Fyrebug stated, I'm pretty sure you HAVE to use class A in Canada.
  8. begreen

    begreen Mooderator Staff Member

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    Could be some confusion here with definitions. There is a difference between triple wall pipe that is totally air cooled and 3 wall pipe that has an inner refractory insulation and an air jacket on the exterior wall.

    suprz, what brand and model of pipe is your dealer promoting?
    Heatsource likes this.
  9. realstihl

    realstihl Feeling the Heat

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    I had some of that triple wall air insulated stuff one time at our old house. I didn't like it at all. Preway was the name brand I think. Galvanized outer with ss liner. Lots of creosote.
    ScotO likes this.
  10. firecracker_77

    firecracker_77 Minister of Fire

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    I was mistaken. I have Class A stainless. I thought that was the same as triple wall. ;em
    ScotO likes this.
  11. ScotO

    ScotO Guest

    You should be happy!
  12. DexterDay

    DexterDay Guest

    My Simpson is Triple wall Class A. It has about 1/2"-3/4" insulation between the inner wall and 2nd wall, then about 2" of air gap to the outer wall. About 10" in diameter total.

    So some triple wall is insulated.
  13. ScotO

    ScotO Guest

    I was always under that assumption, but others told me that ALL triple wall was NOT insulated. Good to know. I know I wouldn't want the un-insulated stuff on my house. I'm really happy with the Class A double wall I have. Looks great, draws great, stays relatively clean (mostly because I'm burning wood thats been seasoned for 2 to 3 years) and it stays reasonable to the touch. It gets warm but not hot....
  14. corey21

    corey21 Minister of Fire

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    I am confused....
  15. suprz

    suprz Member

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    Unfortunately i dont know the name of the brand of pipe. When i go back to pick up the touch up paint for the F3 i will ask. I think he said the pipe was rated up to 2500 degrees?
  16. oldspark

    oldspark Guest

    Triple wall pipe with no insulation and just air gaps is not as good as the insulated pipe.
    suprz likes this.
  17. suprz

    suprz Member

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    That is what i was thinking, it has to have some kind of insulation in one of the triple wall spaces. There would be mothing but air to stop the heat from radiating outward through the layers
  18. begreen

    begreen Mooderator Staff Member

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    Beware of salesmen blowing smoke. Get the specifics.
  19. begreen

    begreen Mooderator Staff Member

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    Not nothing, though not as much protection without the insulation. There is zc fireplace approved, triple wall pipe with just air gaps between the layers. I believe this is lower temp rated, but it's late so I'll let you look it up.
  20. suprz

    suprz Member

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    I called the shop back and the name of the pipe is "AIRJET" anyone using this pipe or know anything about it? The shop guy said they have been using this pipe exclusively for many years and have had zero failures or issues
  21. begreen

    begreen Mooderator Staff Member

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