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# Help needed to identify 2 rads and the EDR per section

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Member Posts: 13
edited February 20
I have several rads (of type 1 below), each with different number of sections---- 13" wide and 23 1/2" high. Each section looks like 5 large heavy solid vertical bars between 2 very large heavy solid vertical end "posts". The square part of the "posts" is 3 1/8" deep. Could you help me ID the rad maker or rad design name and/or help me find the EDR of each section so that I can estimate the EDR of the various rads? please.

I also have several rads (of type 2 below), each with a different number of sections (and heights) with 4 bars total, each bar is about 1 3/8" deep and the total depth of the section is 6 1/4" deep. The rad in the picture is 28 1/2" high. Once again, any help you can give me in identifying the maker or the design name of the rad and/or help me find the EDR of each section, would be appreciated --so that I can find the EDR of the various rads?

When they talk about square footage of the rad, do they mean the square footage of the circumference of each bar or post or perhaps just the frontal square footage of the whole rad?

https://imgur.com/gallery/4Ewjb1U
https://imgur.com/a/ppHAbb3

• Member Posts: 13
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is there an easier way to attach a picture?

https://imgur.com/a/G2fr1pB
https://imgur.com/a/XQf4Jxw
• Member Posts: 2,785
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Find any radiator with the same dimensions and number of columns for the " Close enough EDR"

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• Member Posts: 16,842
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Fortunately, radiators were pretty much standardized by the time these were made.

The one with the supply and return on the same end is a standard large-tube type with a different piping hookup. Any chart for this type, such as American "Corto", National "Aero", U.S. "Capitol" etc. will suffice. The "four-tube" sections shown should run 2-1/4 square feet per section at that height. Other heights will have different ratings.

The other type is a standard wall radiator, with a rating of 7 square feet per section.

These are all in @DanHolohan 's book "E.D.R.".
All Steamed Up, Inc.
Towson, MD, USA
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
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• Member Posts: 13
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In example 2 ----with both pipes coming out at the bottom of one end---how is it likely to be piped internally? Could this have been originally a steam radiator (system) or do the 2 pipe holes at the bottom of one end eliminate this as a possibility?
• Member, Moderator, Administrator Posts: 2,289
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dronic123 said:

is there an easier way to attach a picture?

https://imgur.com/a/G2fr1pB
https://imgur.com/a/XQf4Jxw

@dronic123, you can click on the image icon in the toolbar to insert images. I've placed them in your post for you.

President
HeatingHelp.com
• Member Posts: 9,662
edited February 20
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Note that you will size a new boiler by the heat loss of the structure, not by the connected EDR with a hot water system. If you are trying to figure out SWT or something like that then you need to know EDR.

It was almost certainly always hot water, that arrangement might not work so well with steam but it would be fine with gravity hot water.
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