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Kohler radiators

ChrisJ Member Posts: 11,966
I have already figured out my total EDR for the most part but am curious if anyone has actual published info on these Kohler radiators.  I have various sizes from 7 sections to 20 sections as well as slightly different hights.  Most are between 20 and 22 inches high.  They are around 8 inches deep.

I'm more curious about their age at this point than the EDR however both would be of interest to me.  The town says this house was built in 1920 but the radiators seem too new for that.
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


  • Dave in QCA
    Dave in QCA Member Posts: 1,766
    Here is a Generic EDR Guide

    This comes from an old publication of the ASHRA Guide Book.  Use Table 2 as you have Large Tube radiators.
    Dave in Quad Cities, America
    Weil-McLain 680 with Riello 2-stage burner, December 2012. Firing rate=375MBH Low, 690MBH Hi.
    System = Early Dunham 2-pipe Vacuo-Vapor (inlet and outlet both at bottom of radiators) Traps are Dunham #2 rebuilt w. Barnes-Jones Cage Units, Dunham-Bush 1E, Mepco 1E, and Armstrong TS-2. All valves haveTunstall orifices sized at 8 oz.
    Current connected load EDR= 1,259 sq ft, Original system EDR = 2,100 sq ft Vaporstat, 13 oz cutout, 4 oz cutin - Temp. control Tekmar 279.
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