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Calculating heat loss

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magewick
magewick Member Posts: 31
in THE MAIN WALL


heat loss radiation survey - should radiator covers and uninsulated main piping be included in the survey

Comments

  • hot_rod
    hot_rod Member Posts: 27,505

    just the structure itself, walls, windows, roof, etc.

    All homes have some internal gains from lighting, perplexing, appliances, etc.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • ethicalpaul
    ethicalpaul Member Posts: 8,863
    https://forum.heatinghelp.com/discussion/203170/calculating-heat-loss

    are you trying to size a steam boiler with this information?

    NJ Steam Homeowner.
    See my sight glass boiler videos: https://bit.ly/3sZW1el

  • magewick
    magewick Member Posts: 31

    Yes - trying to size boiler

  • Jamie Hall
    Jamie Hall Member Posts: 27,396
    https://forum.heatinghelp.com/discussion/comment/1878810#Comment_1878810

    A steam boiler is not, repeat NOT, sized by building heat loss. It must be sized to match the installed radiation.

    A hot water boiler is sized by heat loss, but not to exceed the installed radiation — quite a significant difference in many cases.

    Which are you doing?

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    ethicalpaul
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 20,236

    If it is steam the radiation rating (total) determines the size of the boiler. Simply determine the radiation load in EDR or square feet (same thing) and compare that to the boiler rating in square feet of steam.

    Don't calculate BTUs you will just get confused.

    The boiler rating in square feet already has an allowance for piping and pick up built in

    ethicalpaul

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