Shelf Storage Convector Ratings?

Steamhead

We recently looked at a steamer replacement in a church that has several 1950s-era classrooms attached. Each classroom has shelves under the windows with fin-tube behind the shelves. The fin-tube appears to have 4-inch square fins. The toe-kick level is completely hollow and supplies air underneath the fin-tube, as is the area behind the shelves up to the top of the unit where the warmed air escapes. The tops of the units are 36" off the floor. Fortunately, the traps and valves are under the ceiling of the gym below. I didn't get a picture.

When I try sizing these using per-foot values of similar convector units, I get EDR levels that appear quite outrageous. I know companies like Herman-Nelson made many of these units but can't find any published ratings. Does anyone have any rating charts for these things lying around on some dusty shelf?

Thanks in advance for any help.

JUGHNE

My school of 1954 has the same bookshelf set up.
I did find a name of Vulcan-Hartford on the elements I had access to.
These are 1 1/4" iron pipe with 4 1/4" sq steel fins on 1/4" spacing.
The same open toe kick and they are about 3.5' to the top grill, just under the windows.
From the original print that was located with EDR ratings it appears these are 6.9 EDR per foot.
10' rated at 69 EDR
14' rated at 96.6
6' rated at 41.4
The EDR, down to the decimal points, were on the heating print. The lengths were measured by me on site.
These have Hoffman valves on them with orifices installed.
All the traps were original. They got all new traps as there was cabinet/shelve cutting involved.

They also have 2-high fin tubes in convector cabinets for entries and stairwells.
A 2 high with 2 6' tubes is only labeled for 58.2 EDR.
However a single 6' in the same cabinet is 41.4 EDR.

JUGHNE

Steamhead, you seem to be falling of the edge of the page.
Did you get your EDR figured out?

Steamhead

Not yet, but thanks for the info. This week has been insane. But at least we have plenty of work, eh?