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Can you help me figure out the square foot edr of these steam radiators

Joseph_4 Member Posts: 274
I have Dan's edr book but I don't see any name anywhere on these units the element is 8 inches height by 5 and half in width and the cabinet height is 21 inches and the widths of the different radiators vary here are two pictures. thanks joe hardoon HHI services LLC 


  • Jamie Hall
    Jamie Hall Member Posts: 23,419
    If you can't find them -- and quite possibly not -- you can make an estimate as follows.

    Measure the height and width of a fin (top to bottom and front to back). Multiply the two and double that to get the effective area of each fin. Count the number of fins per inch and multiply that by the length and then by the effective area of each fin, then divide by 144. This will get you an estimate of the EDR, but with the fins spaced as close together as they are it will be on the high side.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England