barometric damper?

tjvt Posted By tjvt, Jun 17, 2014 at 12:08 PM

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  1. tjvt

    tjvt
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  2. henfruit

    henfruit
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    if you have more draft than the boiler spec calls for, then yes it would be a good choice.
     
  3. tjvt

    tjvt
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    How the heck do I know that? Excuse my ignorance. I assume I need some sort of draft-measuring device?
     
  4. maple1

    maple1
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    Yes.

    A Dwyer Model 25 Mark II is a good one.

    (Not 100% sure I got that 100% right - that's from a poor-at-times memory).
     
  5. ewdudley

    ewdudley
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    At the risk of hijacking the thread a little, do units with closed-loop stack temperature control, e.g., Fröling, require a barometric damper?
     
  6. velvetfoot

    velvetfoot
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  7. DaveBP

    DaveBP
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    That digital meter has a 40" range. Recommended drafts for boilers are about 1/20". I don't think you could count on the accuracy of the meter to give you a measurement that would mean anything useful.

    Chimney draft meters are pretty sensitive devices. They measure too narrow a range to be useful for much else.
     
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  8. heaterman

    heaterman
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  9. taxidermist

    taxidermist
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    I use this one.

     
  10. velvetfoot

    velvetfoot
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    It's cheap enough so you can just mount it permanently near the boiler(s). Even 3" is high though; I suppose that's the lowest range of the Dwyers?
     
  11. maple1

    maple1
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    That's the same one I have & was trying to recommend. Mine has been permanently mounted since September 2012. Simple & reliable, and seems to be quite accurate too. Took just a little bit of fiddling, and a little bit of spilled red stuff, to get it zeroed the first time but I haven't touched it since. When burning in the winter I'm pretty steady right at 0.1".
     
  12. tjvt

    tjvt
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    Does the Mark II 25 come with detailed instructions regarding where to mount, where to measure, etc? Do most of you have your dampers below your T like taxidermist? For whatever reason I envisioned installing mine above my T, between my T and the stove pipe.
     
  13. maple1

    maple1
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    My manometer probe is about 6" from the back of my boiler, then my barometric damper is a couple feet downstream of that, followed right away by a cleanout T that sends things up out my chimney - except for a bit of ash that doesn't make it up & out & therefore settles in the bottom of the cleanout.
     
  14. brenndatomu

    brenndatomu
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    The draft probe needs to go in between the baro and the stove. Preferably in the middle of a straight run of pipe
     
  15. taxidermist

    taxidermist
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    I only put it there because it was a after thought and i would hav had to buy more high $$$ pipe to make it work. That being said it works great where it is and it stays very clean.
     
  16. flyingcow

    flyingcow
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    Did not put one in..works fine
     
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