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Thread: Outdoor rock fireplace chimney - share with house fireplace?

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    texasdad's Avatar
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    Outdoor rock fireplace chimney - share with house fireplace?

    Please give my typing mistakes. I'm posting from my iPhone. The keys are small, my fingers are fat, and the phone keeps incorectly correcting me.

    I'm am transitioning between the dreaming and planning stage of an outdoor fireplace and wood oven. The location I want for it is just opposite the living room fireplace. Is it possible to tie the chimneys together around ceiling height. Or should I plan on building a new chimney above roofline next to the existing one? I'm concerned two chimneys side by side would look bad on the house roofline.

    If it makes any difference the existing fireplace is modern with metal firebox and metal pipe chimney.
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    WestSidePool's Avatar
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    Re: Outdoor rock fireplace chimney - share with house firepl

    These rules vary depending on location and authority, so you'll have to check your local building codes. But it's usually considered unsafe because the exhaust products from one fireplace can find it's way back into the house through the other fireplace.
    Eric

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    Melt In The Sun's Avatar
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    Re: Outdoor rock fireplace chimney - share with house firepl

    +1 for WestSidePool's comments. Check your codes, but it's probably not allowed. I bet you could run two separate metal chimneys inside one larger stone structure.
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    Re: Outdoor rock fireplace chimney - share with house firepl

    And +1 from Melt. It would probably require a rebuild for your current chimney. You will have to have 2 separate flues going up the entire chimney chase. Tying 2 flues would do exactly that.....drafting the wrong place/wrong time, and you would have some issues.
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    texasdad's Avatar
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    Re: Outdoor rock fireplace chimney - share with house firepl

    Ok, so my first idea to merge the flues into one is a no go.
    Maybe two flues in the existing chimney structure is workable. I'll look closer at what is there now to see.
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    Re: Outdoor rock fireplace chimney - share with house firepl

    Quote Originally Posted by WestSidePool
    These rules vary depending on location and authority, so you'll have to check your local building codes. But it's usually considered unsafe because the exhaust products from one fireplace can find it's way back into the house through the other fireplace.
    X2.
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