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EDR on pipe-based radiator
I have this radiator (one of two 2-pipe radiators in my 1-pipe system) and am trying to determine the EDR. Diameter is 1 1/4 and each section is 24” wide. Using the EDR guide for direct pipe coils from The Lost Art pg 123, I could see two ways of calculating this. It’s either 24’ of single-row (EDR of 16.2) or 2’ of twelve-row (EDR of 8.38).
Any thoughts on which one is correct?
Homeowner from Providence, RI
Home b. 1897, one-pipe steam with a indirect gravity hot air system using Gold's pin radiators.