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What the heck do those letters stand for?

HeatingHelp Administrator Posts: 651
edited October 2022 in THE MAIN WALL
imageWhat the heck do those letters stand for?


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  • hawkaye
    hawkaye Member Posts: 1
    What does 3H2C stand for? And what does it mean?
  • Jamie Hall
    Jamie Hall Member Posts: 23,567
    Lovely -- and potentially useful. Stick it in the reference section somewhere.

    I've never been addressed as "your majesty", though. More often it's "that idiot"...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • leonz
    leonz Member Posts: 1,168
    Thanks Dan and Erin,

    Seeing P.P.M. reminded me of my days in underground mining dealing with Radon Daughters
    in parts per million and mine gasses like Methane and Hydrogen Sulfide and measuring them with handheld Drager bellows vacuum pumps.
    JUGHNE Member Posts: 11,095

    In thermostat talk it can mean able to handle equipment having up to 3 Heating stages and 2 Cooling stages.
    Alan (California Radiant) Forbes
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,077
    edited October 2022
    I see WOG, but couldn't find WAG.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • ratio
    ratio Member Posts: 3,676
    I think some are missing:

    RFN = Right Fastly Now (really important)

    OSRFN = Oh Shoot Right Fastly Now (even more really important)