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Burner output at various gas pressures....

I am looking for a simple chart that shows burner output related to manifold pressure from about 0.7 inch WC up to 3.5 inches WC., in 0.1 inch increments. 

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  • JStar
    JStar Member Posts: 2,752

    Working on a modulating furnace?

    I have a chart for pressures 3.0 to 4.0, but no lower than that. I also have a tech book for York modulating furnaces that shows BTUH output per every step of modulation. Could that help?
  • Tim McElwain
    Tim McElwain Member Posts: 4,628
    edited January 2012
    For what orifice size

    are you looking for?

    I use a Bryant Gas Orifice Calculator it goes from .5" W.C. up to 15" W.C.it has a catalog number of MP-5706B, it also includes a pipe size calculator on the other side.
  • That sounds like it will work

    I am trying to find out what manifold pressure to dial in on all the oversized boilers I come upon, which allow downfiring.  Most of the time I just disconnect the high fire circuit and the boiler is at least on the same planet as the system size for steam.  I'll see if I can get that chart.

    Thanks Again!

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  • Empire_2
    Empire_2 Member Posts: 2,343

    I to have the slide calculator and it's a great tool.  Used it many times.

    Mike T.
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