Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Importance of Barometric Damper?

Bob Bona_4
Bob Bona_4 Member Posts: 2,083
to put it on the branch of a T. Do you put the weight on "V" or "H" ?

Does make it easy to vac the chimney though :)


  • Eric L._2
    Eric L._2 Member Posts: 94
    Importance of Barometric Damper?

    What is the importance of the Barometric Damper on an atmospheric bolier? Does it have any effect on efficiency? The Effikal I had on my SGO7 was not working right at all as it would get stuck closed. I replaced it with an RC damper spec'd for my boiler and now it has flamed out twice so I adjusted the air intake and it seems fine , gotta' get it tuned. Does it really have that much effect on boiler operation? Thanks.

    Eric L.
  • Brad White_185
    Brad White_185 Member Posts: 265
    Barometric Dampers

    The function of a barometric damper is to negate (not impose) an effect on the boiler.

    Once your air/fuel ratio is set up at the burner, it essentially wants to remain constant.

    Without a barometric damper (or the ubiquitous AGA draft hood), with every change in the indoor/outdoor temperature difference, change in wind speed and direction, the draft would also change and upset the balance you have created.

    If the draft increases, these devices act as a "vacuum breaker" to draw in the balance of air the chimney requires. The chimney will not be denied, but if you feed it directly, it will leave your boiler essentially alone.

    As for the details of flame-out and adjustment, I will leave that to the more qualified techs to answer.
  • Bob Bona_4
    Bob Bona_4 Member Posts: 2,083
    see my

    lower post on the "Riello" thread on "flameouts".
  • Bob Forand
    Bob Forand Member Posts: 305
    How about

    I have seen the draft regulator placed in the end of a tee, not in the branch. Does this cause an issue with the damper or draft ? Eric L, this just seemed like a good place to ask the question. As for getting stuck, whenever I service a boiler, I grease that spot on the damper where the rod goes through.
  • JohnNY
    JohnNY Member Posts: 3,226

    What is the "branch" of a tee?

    Please clarify for the plumbers whose own terminology refers to either the run or the bull.


    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
This discussion has been closed.