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fireplace metal block off plate seal/insulation and steel pipe questions

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by lmei007, Nov 27, 2007.

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  1. lmei007

    lmei007 Member

    Joined:
    Nov 12, 2007
    Messages:
    117
    Loc:
    Boston MA
    Hi there,

    I am in the process to make a metal block off plate for my fireplace. There are two holes for the pellet stove exhaust pipe and air intake pipe. My question is what kind of insulation material i can use to seal those two holes? I bought a bag of fireglass in Homedepot plumbing department but I am wondering if it is ok to be used here because the temperature here will be very high at least for the exhaust pipe.

    I plan to use stove gasket kit to seal the plate with the fireplace: http://www.lowes.com/lowes/lkn?action=productDetail&productId=67093-85334-GA1086&lpage=none

    Another question is how can I cut the stainless steel pipe? Is this one (http://www.homedepot.com/webapp/wcs...N=10000003 90039&marketID=39&locStoreNum=2674) good enough for this purpose? or I can use small metal saw to cut it?

    No experience, please point me to the right direction.

    thanks,

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  2. Xena

    Xena Minister of Fire

    Joined:
    Nov 30, 2005
    Messages:
    2,491
    Loc:
    South Shore MA
    lmei the recommendation is for kaowool
    to insulate the plate. The pellet vent does not
    get hot like a wood stove pipe btw. I can hold my hand
    on it with the stove running and not get burned
    but it's still recommended to use the kaowool.

    I'd return that bag of fiberglass you bought and
    see if they carry the kaowool. Ask for help in the
    store to avoid buying the wrong this a second time.

    Cutting the ss flex is easy with the right tool.
    I used an air tool cut off wheel, but I'm sure HD sells
    some sort of big tin snips that will cut the ss flex.


    Again, ask for help in the store and tell them you are cutting stainless
    steel flex pipe so you don't wind up buying something
    that won't do the job.
    Don't forget to wear gloves and eye protection when cutting that flex.
    The edges are sharp as cat claws after cutting.
  3. lmei007

    lmei007 Member

    Joined:
    Nov 12, 2007
    Messages:
    117
    Loc:
    Boston MA
    The user manual (http://content.hearthnhome.com/downloads/installManuals/man_1200i.pdf) page 14 and page 15 says: Use metal plate around exhaust vent pipe and seal all edges with non-flammable insulation such as fibreglass, mineral wool or ceramic." So I think the fiberglass should be ok here. But I don't know if the fiberglass has different types and different type can only be used at certain environment.
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