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As I understand it 1 EDR is the equivalent of 240 BTU's per square ft. of radiation when there is 215 degrees F of steam and 70 degrees of air outside the rad.
With hot water radiation you should get about 170 BTU's per sq. ft. when the water temp. is 180 degrees.
The question I have is related to the latent heat of vaporization. If you have 215 degrees of water ( pressurized, of course) in a radiator, how many BTU's would be released per sq. ft. of radiation?
Would it be the same 240? Shouldn't be less due to the fact that you are not releasing latent heat? If so, how many BTU's per EDR?
Looking to clarify the whole EDR thing at that boiling point temperature regardless of pressure, if that makes any sense.