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  1. #1
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    Default NG Vented Fireplace

    New construction. This vents a natural gas manufactured fireplace.

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  2. #2
    Join Date
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    Default Re: NG Vented Fireplace

    I'm not seeing anything.... Do you mean the chimney? Or, the bath fan vent? Is there a chance the FP is a ventless type?


  3. #3
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    Post Re: NG Vented Fireplace

    It's a wood frame chimney with metal vent inside, terminates at the top. Note the two-story house about three feet away, and the operable window.

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  4. #4
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    Spring City/Surrounding Philadelphia area
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    Default Re: NG Vented Fireplace

    Now that's what you call planning.


  5. #5
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    Question Re: NG Vented Fireplace

    Is it a factory built wood burning fireplace with a set of vented gas logs, a B-vented gas fireplace, or a direct vent fireplace? Each has its own special requirements.

    You guys tell me, what would be the requirements in each of these cases based on what you see and the information that is is three feet from the gable end where that bath fan termination is? Also, in each case, if you find it a problem, what remedial measures do you recommend and what is your source for that recommendation?

    Bob Harper

    Keep the fire in the fireplace.

  6. #6
    Join Date
    Mar 2007
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    Ormond Beach, Florida
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    Default Re: NG Vented Fireplace

    Quote Originally Posted by Bob Harper View Post
    Is it a factory built wood burning fireplace with a set of vented gas logs, a B-vented gas fireplace, or a direct vent fireplace? Each has its own special requirements.

    You guys tell me, what would be the requirements in each of these cases based on what you see and the information that is is three feet from the gable end where that bath fan termination is? Also, in each case, if you find it a problem, what remedial measures do you recommend and what is your source for that recommendation?

    Bob Harper
    What a set-up for failure for us.

    Q: "Is it a factory built wood burning fireplace with a set of vented gas logs,"

    A: Wood burning requires that the top of the flue/vent be (3-2-10 rule) at least 3 feet high, and at least 2 feet higher than any part of any structure within 10 feet.

    Q: " a B-vented gas fireplace,"

    A: Type B gas vents require the top of the vent to be (1*-2-8 rule) at least 1 foot high*, and at least 2 feet higher than an obstruction within 8 feet.

    *The 1 foot minimum varies based on slope, 1 foot is the minimum, it goes up from there with steeper slopes. Check the table (see attached example).

    Q: " or a direct vent fireplace? "

    A: Read the manufacturer's installation instructions.

    By raising the first two to the minimum height above the nearby roof, I think it eliminates the bath fan question - of course, though, Bob H., will show me the errors of my ways ...

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  7. #7
    Randy Clayton's Avatar
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    Default Re: NG Vented Fireplace

    Jerry is corect check those findings;and just another thing I would look out for on your inspections ive found many gas log fireplaces with zip screws put into the side of flues to secure straps

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  8. #8
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    Mar 2007
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    Post Re: NG Vented Fireplace

    Any way it is sliced, it looks like either the code inspector was not thinking, or there is some fact not yet revealed. Those plans had to have been reviewed.

    The unit was not fully visible - covered with plastic sheeting and waiting for finish work around the fireplace on the interior. But the information that I have is that it is a manufactured gas fireplace.

    Even if it is a direct vent unit, the vent termination does not appear to meet standards. (In this case, the Michigan Residential Code)

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  9. #9
    Join Date
    Mar 2007
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    Hudson, WI
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    Default Re: NG Vented Fireplace

    Quote Originally Posted by Randy Aldering View Post
    Even if it is a direct vent unit, the vent termination does not appear to meet standards. (In this case, the Michigan Residential Code)
    Since we don't have sufficient info to determine if this install is in line with the manufacturer's instructions, what does "Michigan's Residential Code" have to say about this install?

    Just trying to understand where you are coming from.


  10. #10
    Join Date
    Mar 2007
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    Post Re: NG Vented Fireplace

    So far, one code inspector is saying that the 10-2 rule does not apply, and another is saying it does. The mfr. guidelines supplied by the builder does not mention the 10-2 rule, but mentions checking local codes in the fine print. It boggles my mind as to why the 10-2 rule would not apply. Even if the fireplace is classified as a direct-vent appliance, they are not utilizing that type of vent. The builder provided only the venting information, and not the mfr., model, or any other information - so far.

    Randall Aldering GHI BAOM MSM
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