adapter or 6 inch all the way?

ramackJuly 27, 2011

I am putting in a 65000 BTU wood stove with a 6 inch flue. This will be replacing a Heatilator which has a triple wall 12 inch O.D., 8 inch I.D. steel chimney. Could I use a 6-8 inch adapter from the stove to the chimney, or do I need 6 inch pipe all the way out? This is a 15 foot straight vertical chimney.

The place I bought the stove is telling me I need 6 inch all the way. I'm thinking that I can use an adapter from the 6 inch stove pipe to the 8 inch chimney pipe.

Rich

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christopherh

You need the 6 inch all the way up to maintain a proper draft. And there should be insulation surrounding the insert to maintain heat in the flue to keep the draft.

    Bookmark   July 28, 2011 at 7:15AM
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ramack

What type of insulation material? Vermiculite?

Looks like I am going to need the 6" all the way. The current Heatilator doesn't appear to be rated for 2100F.

    Bookmark   July 28, 2011 at 11:35PM
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christopherh

The brand name is Kaowool. It's a white ceramic fiber insulation and is used in places where heat is a concern, like power plants.

But why are you looking at 2100 degrees? The normal surface temperature of a well running stove is +/- 600 degrees. And today's modern stoves either use a CAT or secondary combustion to retain the heat and prevent that heat from escaping up the flue. Lost heat is lost money.

What brand is the stove?

    Bookmark   July 30, 2011 at 6:39AM
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