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Boiler sizing based on EDR

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Ldallas_87
Ldallas_87 Member Posts: 22
in Strictly Steam

I need a new steam boiler. I calculated my current EDR as 370 without the piping pick up factor. When looking for a boiler do I just need to match the boiler steam sq. ft. output to the EDR because the boiler steam rating includes the 33% pick up factor that I did not account for? For clarity, based on the ratings for Burnham Independence boilers: the IN5I would be slightly below requirements and the IN6I would be somewhat oversized?

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Comments

  • Jamie Hall
    Jamie Hall Member Posts: 27,367

    Match the boiler Square Feet rating to the EDR — don't add anything else. If the match isn't perfect (it rarely is!) better to go slightly undersized than go oversized — so in this case the IN5I would be the prper choice.

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    ethicalpaulRobert_H
  • ethicalpaul
    ethicalpaul Member Posts: 8,786

    Although a Burnham IN model is possibly the worst choice amongst all the available boilers

    NJ Steam Homeowner.
    Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
    See my sight glass boiler videos: https://bit.ly/3sZW1el

    STEAM DOCTORRobert_H
  • Ldallas_87
    Ldallas_87 Member Posts: 22

    Thank you. What would you recommend ethical Paul?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 20,170

    I hate Burnham but the "Steam Max" is their best boiler. Otherwise, Peerless or Weil McLain. Weil McLain also makes the Williamson brand. A few $$$ less same boiler.

    Burnham Independence has a poor track record. You don't want that one. There are a few other decent boilers but most are "rebranded".

    Burnham in particular sells a lot of boilers with different names on them but they are all Burnham. Crown, New Yorker et are Burnham clones afaik

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