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  1. #1
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    High efficiency venting options.

    My boss sold this job that has 2 furnaces. Furnace 1 is being replaced with a Bryant evolution 95%. Furnace 2 is staying. We are below grade with the old 80% venting into a chimney. We have another chimney right next to it available but it offsets about 10" and I cant get 3" PVC in that offset. Any ideas?
    I have heard of poly vents but no one around here knows WTF I'm asking for.

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  2. #2
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    Jul 2018
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    Will 2inch fit? If so you may be able to reduce to 2inch for a short length. It shouldn't restrict a crazy amount but will increase the velocity in that section of pipe. If you need to reduce on a horizontal keep in mind you can get eccentric PVC reducers.

    Sent from my SM-G960U using Tapatalk

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  4. #3
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    Thread Starter
    Quote Originally Posted by Spitz View Post
    Will 2inch fit? If so you may be able to reduce to 2inch for a short length. It shouldn't restrict a crazy amount but will increase the velocity in that section of pipe. If you need to reduce on a horizontal keep in mind you can get eccentric PVC reducers.

    Sent from my SM-G960U using Tapatalk
    Not really. Its 7x7 terracotta and it offsets about 12 inches over 3 ft.

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  5. #4
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    Apr 2003
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    This might be the "poly vent" that you heard about. I have never seen or used it, but it might be a good option if you can find someone to sell you the stuff.....

    http://www.duravent.com/Product.aspx?hProduct=26

    If at First You Don't Succeed, Skydiving Is Not for You.

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  7. #5
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    Jul 2000
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    Northern Wisconsin
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    If the other chimney is straight, swap furnace venting?
    Use the biggest hammer you like, pounding a square peg into a round hole does not equal a proper fit.

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  9. #6
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    Jul 2018
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    Quote Originally Posted by firecontrol View Post
    If the other chimney is straight, swap furnace venting?
    Was thinking sell them two new furnaces and run the pvc up the chimney

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  10. #7
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    Thread Starter
    Quote Originally Posted by firecontrol View Post
    If the other chimney is straight, swap furnace venting?
    I have been thinking about this for about an hour now.

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  11. #8
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    Sep 2015
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    Ontari-ari-ari-o
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    How far below grade? I consider running venting up and out the chimney the last resort usually there is some spot to punch a hole and take the venting out the side. If I have to break out any ladder taller than 6' that is a failure of a day to me.

  12. #9
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    Feb 2018
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    Thread Starter
    Quote Originally Posted by ammoniadog View Post
    This might be the "poly vent" that you heard about. I have never seen or used it, but it might be a good option if you can find someone to sell you the stuff.....

    http://www.duravent.com/Product.aspx?hProduct=26

    That's the stuff just gotta find it.

    Sent from my SM-G955U using Tapatalk

  13. #10
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    Quote Originally Posted by Sooty View Post
    How far below grade? I consider running venting up and out the chimney the last resort usually there is some spot to punch a hole and take the venting out the side. If I have to break out any ladder taller than 6' that is a failure of a day to me.
    The subfloor above is at grade. My only option. Is up and I'm beginning to think swapping the flue is the answer.

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  14. #11
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    Sep 2015
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    Could you get where you need to go with a helper and a shovel?

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  16. #12
    Join Date
    Mar 2015
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    Hamersville, Ohio
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    Quote Originally Posted by Zamoramax View Post
    My boss sold this job that has 2 furnaces. Furnace 1 is being replaced with a Bryant evolution 95%. Furnace 2 is staying. We are below grade with the old 80% venting into a chimney. We have another chimney right next to it available but it offsets about 10" and I cant get 3" PVC in that offset. Any ideas?
    I have heard of poly vents but no one around here knows WTF I'm asking for.

    Sent from my SM-G955U using Tapatalk
    "We are below grade"

    Meaning that the Banding board for the Floor joists is "Below Grade" Zamoramax?

    Can't You Sidewall the Venting via Sch. 40 PVC?
    Hos 4:6 My people are destroyed for lack of knowledge. Because you have rejected knowledge, I will also reject you, that you may be no priest to me. Because you have forgotten your God’s law, I will also forget your children.


    "You've got to Stand for Something or You'll fall for anything" (A. Tippin)


    Mat_15:24 But he answered, “I wasn’t sent to anyone but the lost sheep of the house of Israel.”

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  18. #13
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    Mar 2015
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    Hamersville, Ohio
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    Quote Originally Posted by Sooty View Post
    How far below grade? I consider running venting up and out the chimney the last resort usually there is some spot to punch a hole and take the venting out the side. If I have to break out any ladder taller than 6' that is a failure of a day to me.
    Hos 4:6 My people are destroyed for lack of knowledge. Because you have rejected knowledge, I will also reject you, that you may be no priest to me. Because you have forgotten your God’s law, I will also forget your children.


    "You've got to Stand for Something or You'll fall for anything" (A. Tippin)


    Mat_15:24 But he answered, “I wasn’t sent to anyone but the lost sheep of the house of Israel.”

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