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concentric vents

jjp76
jjp76 Member Posts: 3
in Gas Heating

I have a gas furnace and a on demand tank less water heater both vented with concentric vents How far can the concentric be apart or how close one is lower on the roofline then the other but in line

Thanks!

Comments

  • Ironman
    Ironman Member Posts: 7,539

    Check the installation manual for both appliances as it can vary. However, one should not be installed below the other one as that can cause exhaust gases to be drawn into the upper one.

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    Mad Dog_2
  • jjp76
    jjp76 Member Posts: 3
    https://forum.heatinghelp.com/discussion/comment/1823022#Comment_1823022

    says 4 inches to 24 inches between i see your point about one lower then the other so should i install across same elevation as the other would be my thought

  • Ironman
    Ironman Member Posts: 7,539

    Yes.

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.

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