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Radiation Identification

I am trying to determine the EDR rating for radiation for a 1931 office building in NYC.

Cannot find the exact match in the EDR book.  Does anyone have any info?


  • ChrisJ
    ChrisJ Member Posts: 15,784

    I think we're going to need some pictures for this one.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • Jeffrey Eichenwald
    Jeffrey Eichenwald Member Posts: 9
    Radiation Identification

    Apparently the photos I sent were too large.  I have reduced them in hope that they can be posted.  If anyone has any info on these panel radiators from the 1930s, it would be greatly appreciated.

  • Canucker
    Canucker Member Posts: 722
    3rd pic

    Hard to tell from this angle but it sure looks like this,

    You can have it good, fast or cheap. Pick two
  • Steamhead
    Steamhead Member Posts: 16,893
    The first two

    are probably National Panel radiators. See page 152 of Dan's book "E.D.R." for dimensions and ratings.

    The third is made up of several standard wall radiator sections, which appear in the same book.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
    Radiator Enclosures

    If some of these radiators have enclosures (like the one shown in the first picture) that block convective air currents, this will reduce the EDR.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24