air volume in radiator

Matt_37

Now I'm ready to balance my one-pipe steam system... Since I don't have Dan's Steam School workbook and E.D.R. (I do have the other 3 steam books and the Balancing e-book), could somebody please take a look at the radiator pics attached and tell me what the air volume per section is? I don't know if the chart #2 in Dan's school workbook only lists the volume per EDR for the whole radiator or if it can be broken down by section and then the section volumes can be added up.

The two sizes of standard-looking 3-column radiators throughout the house are either 2' or 2'10" tall, and vary in # of sections. I couldn't find any apparent manufacturer's writing on the radiators. The house was built in 1917, but I can't tell if the radiators were original or added in the first several decades afterwards.

Thanks! Matt

Mike T., Swampeast MO

From old rule-of-thumb regarding water volume of standing radiators:

IN PINTS! AND PER SQUARE FOOT OF EDR!

Column rad: 1.5 pints/sqft EDR

Flue rad: 1.75 pints/sqft EDR

Thin-fin tube: 0.807 pints/sqft EDR

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1 pint = 28.875 cubic inches so, for your column rads:

EDR * 43.31 = approximate volume of air in cubic inches

Matt_37

Thanks for the info Mike!

I guess I'll go ahead and get Dan's E.D.R. book and look around for the ratings on these.

Matt

Mike T., Swampeast MO

Not to an any way diminish the value of "EDR", but EDR ratings for standard (yours is an example) column radiators are easily available--including at this site. Spend the time looking--you'll enjoy what you discover along the way!

Matt_37

Thanks for the push! Pretty steep learning curve for seemingly small stuff like this, but it sure is fun. I've already found the info (I swear I looked around some before asking) and am going down the road...

Matt