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Boiler Sizing

HeatingHelp
HeatingHelp Administrator Posts: 680
edited October 2017 in THE MAIN WALL

Comments

  • jayjayt
    jayjayt Member Posts: 2
    great article, now how do I size for a new boiler?
  • Henry
    Henry Member Posts: 998
    You have to measure all the radiation and NOT the building.
  • jayjayt
    jayjayt Member Posts: 2
    so how do I go about this? measuring all the radiation? the house is about 100 years old the boiler from 1986 approx. a burnham, no specs on it, we have three floors and a basement.
  • MilanD
    MilanD Member Posts: 1,160
    Search around here for Radiator EDR calculations. You can also Google it. There are a few charts out there to help measure them.
  • Henry
    Henry Member Posts: 998
    You have to identify the radiator type: height depth and number of colums per section. You then need to count the number of sections on each radiator. You can search this site for a listing of radiator types or look up "Boiler Data Book" which has radiators and boiler EDR information. How old is your existing boiler? What make and model?
  • BobC
    BobC Member Posts: 5,502
    This might help you figure it out.

    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
  • TanklessDR
    TanklessDR Member Posts: 4
    jayjayt said:

    great article, now how do I size for a new boiler?

    Check this out.. http://www.dunkirk.com/sites/default/files/Dunkirk Radiation Tables.pdf

  • BobC
    BobC Member Posts: 5,502
    All you have to do is figure out the EDR of each radiator and then total them all up. Then you select the size of boiler by matching the total EDR of all the radiators to the Sq Ft of steam rating of the boiler. Don't bother with the BTU rating, just deal with the Sq Ft of steam.

    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
    Henry
  • neilc
    neilc Member Posts: 2,854
    JT,
    this is a steam system,
    not hot water,
    correct?
    known to beat dead horses

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