What kind of radiator is this?

ukrolls

My wife @winter_is_coming posted yesterday about our probably dead boiler. Our Weil-McLain EGH-95 is showing signs of wear and lack of maintenance (aka cracks and leaks). As she explaIned forum.heatinghelp.com/discussion/155778/is-my-weil-mclain-egh-95-dead-replacement-advice-requested#latest, we inherited the system two years ago and have fought to keep it running; unfortunately the boiler seems to be dead and we have not found competent help to keep it running.

We have ran the EDR calculations for most of the system but cannot determine the numbers for four of our radiators. These radiators are mounted below the first floor in the basement, and serve the "great" rooms on the first floor, Dining Room (360 sf, 10 ft ceilings), Foyer (180 sf and 10 ft ceilings) and Living Room (480 sf, 10 ft ceilings supplied by 2 radiators).

The radiator systems are made up of "tubes" roughly 1.5" in diameter with discs roughly 3" in diameter. Each "tube" is about 36" long. These "tubes" are in groups of 10 wide and 2 deep and connected in a manifold system. Each radiator is below a grate on the 1st floor and enclosed in duct work below the floor which is connected to another grate to promote air circulation (I assume?).

I have attached pictures that attempt to show the radiators I have described. It is difficult to get a total view since the radiators are covered in duct work. My wife has also attached pictures in the above link that show our situation. How do we determine the EDR for these radiators??

Please pardon my ignorance if my descriptive terms are not correct. Thanks in advance!

Steamhead

Those are indirect radiators. You might be able to find them in Dan's book "E.D.R.". If not, go by the maximum amount of radiation the steam pipe feeding each indirect can carry.