BTU rating for cast iron radiators

Biker

Looking for a chart that explains the BTU ratings for different size cast iron radiators.
Thanks
Rich

Fred Campbell

Radiator Btu's

Go to "SHOP" on the overhead task bar and get Dan's book, "EDR..every darn radiator". Short of that you can find a professional in your area who has one, or post pics and dimensions of ALL your radiators and hope one of us has the kindness and patience to figure it for you.

Steamhead (in transit)

We also need to know

if you're working on a hot-water or steam system. BTU output differs dramatically between the two.

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Brad White_103

Especially if

you are modulating your hot water temperature.

As a general rule for CI radiators (measured in square feet EDR or "Equivalent Direct Radiation") emit BTU's per hour (BTUH) in a 70 degree room as follows:

215 degrees (steam basis rating) 240 BTUH per EDR

Hot Water at AVERAGE water temperatures (halfway between supply and return temperature at the radiator):

170 F = 150 BTUH

160 F = 130 BTUH

150 F = 110 BTUH

140 F = 90 BTUH

130 F = 70 BTUH

120 F = 50 BTUH

100 F = 30 BTUH

90 F = 10 BTUH

All in a 70 F room remember.

Fred Campbell

So Kind

Brad, I'm gonna cut and paste those figures for myself. A god among men? Well...you're working on it.

TG

Brad White_103

You are too kind, Tom

Thanks for the kind words but I am far from there. Just trying to help where I can.



BEW