Calculate BTU output of my old cast iron radiators

Amy FitzGerald

Can someone recommend a website that is user friendly that I can use to calculate the BTU output of my old cast iron COLUMN TYPE radiator as well as the TUBE TYPE models?

jpf321

E.D.R. Book

Dan, this website's creator, compiled a book that will help you.. http://www.heatinghelp.com/products/Books/5/80/E-D-R-Ratings-for-Every-Darn-Radiator-and-convector-youll-probably-ever-see



I used it recently and found it very helpful.

Jamie Hall

Dan's book

will give you the effective radiating area, called EDR, of the radiator.  Then multiply by 240 to get the output in BTU for steam.