Boxing in my new chimney

Norsk Posted By Norsk, Oct 13, 2010 at 2:51 AM

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  1. Norsk

    New Member 2.

    Sep 27, 2010
    Central, MN
    I installed a regency stove in our lower level and used Metalbestos pipe to go up through the next level. This is our first wood stove. Can I place vents in the boxed in area? It is dry walled with fire grade drywall. I don't know if placing a vent on the box will offer warmth or would create a problem. The inspector did not know.

    Also, I'm over 2 inches away from the framing, although in two to spots I'm under 3 inches. Can anyone speak to what type of safety testing is done on these pipes? Just wondering if I can I sleep at night.

  2. begreen

    Mooderator 2.
    Staff Member

    Nov 18, 2005
    South Puget Sound, WA
    Yes, you can vent the chase. It will probably be most effective if you put a vent at the top and bottom to assist convection. The class A pipe is safely tested at 2" clearances, though no harm exceeding the minimums. Have a good night's sleep.
  3. Dakotas Dad

    Dakotas Dad
    Minister of Fire 2.

    Mar 19, 2009
    Central Kentucky
    While I cannot tell you exactly what "safety testing" is done, I can tell you I hang with several mechanical and materials engineers, as well as a couple civil, and I am positive, if the manufacturer and .gov has come up with "2 inches is safe" you can bet the true safe value is at least 1/4 of that, or in this case 1/2 inch. As long as you meet the minimum (2") everywhere, you are, as they say, golden.
  4. basswidow

    Minister of Fire 2.

    Oct 17, 2008
    Milton GA
    with my stove blazing on a full load, I can go up in my attic were the chase is open and touch the pipe with my hand and it's cool to the touch. Amazing. My chase has all the appropriate clearances. I should probably close in the attic side too, but the inspector did not require it - so it's still open. I feel very safe with my set up. My chase is insulated on the house wall side only and I worried that the flue temps might be too hot for the insulation or what if the insulation fell loose and against the flue. But I don't worry after feeling the pipe for myself. It is amazing. You may find that venting the chase doesn't do much. Warm up and sleep well.
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