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Which EDR factor to use?

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ranzerox
ranzerox Member Posts: 52
edited December 2021 in Strictly Steam
I have a columnar radiator with 4 tubes, 20" height, 6-1/4" depth, and I'm am trying to determine its EDR. I'm finding different charts provide different factors to use. For example, Chart 1 provides a factor of "4" and that calculates to 76 (4.0 x 19), Chart 2 provides a factor of 2.2 and that calculates to 41.8 (2.2 x 19). What am I doing wrong?

Thanks

Chart 1
Chart 2

Comments

  • KC_Jones
    KC_Jones Member Posts: 5,739
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    You need to determine what type of radiator it is.  You are looking at two different charts, one for column style rads and the other for tube type, so that’s why you are seeing a difference.

    If you post a picture of the radiator we can tell you what type it is, I’m guessing tube type, but the pictures will tell the tail.
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
    ranzerox
  • ranzerox
    ranzerox Member Posts: 52
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    I get that part, columnar vs. tubular, but Chart 2 seems to direct me to use tube numbers due to my radiator 6-1/4" depth. In their chart, for 4 columns/tubes, columnar displays 11-1/4" for the width while tubular displays 7", seems to me that I should use tubular, confusing.

    Thanks


  • KC_Jones
    KC_Jones Member Posts: 5,739
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    The chart doesn’t tell you what type you have, you look at your radiator and determine what type it is then use the appropriate chart.

    If you can’t find it in any readily available charts, you may have something unique.  If you post a picture someone can help.
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
    ranzerox
  • Steamhead
    Steamhead Member Posts: 16,843
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    Post a pic of the radiator in question.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,544
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    It has to be tubular. You couldn't fit 4 columns in a 6 1/4 " space.

    So you should have 2.2 EDR/section
    ranzerox
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,852
    edited December 2021
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    The original manufacturer is the only source for determining the actual EDR of a particular radiator section. Since that information is not always available, there are generic charts that will get you close. Look at your radiator and determine if the radiatoris a column that looks like this or a tube that looks like this

    Column type resembles the circumference of a 1-1/4 to 1-1/2 diameter pipe, while a tube type looks more like 3/4" pipe diameter

    I think the drawings associates with the charts are pretty self explanatory.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
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    Tube type radiators come in two varieties. The newer "slenderized" small-tube radiators, like the American Radiator Arco, and the older large-tube radiators, like the American Radiator Corto, which are closer to column radiators in EDR.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
  • ranzerox
    ranzerox Member Posts: 52
    edited December 2021
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    I have 4 variations of radiators I find, here's their photos:

    a) Living Room
    Height 20; Depth 6-1/4



    b) Dining Room
    Height 32; Depth 5-5/8


    c) Bath
    Height 19-1/2; Depth 4-1/2


    d) Bed Rooms
    Height 26; Depth 4-1/2


    Thanks!

  • Steamhead
    Steamhead Member Posts: 16,843
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    Those look like small-tube radiators. Use the Burnham Slenderized chart in "E.D.R.".
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    ranzerox
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
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    Crane still makes and sells cast iron radiators in the UK.

    https://craneradiators.com/crane-cast-iron-radiators

    Their designs seem to have changed a little, but I'm not sure if or how much this affects the output. You might try contacting them to see if they have ratings for the old radiators.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
    ranzerox
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
    edited December 2021
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    I'm not sure who made that dining room radiator, but you might find some useful information here: https://www.oldcastironradiators.com/NewStyle.htm or here: https://www.oldcastironradiators.com/NewSlenderCompactB.htm
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
  • ranzerox
    ranzerox Member Posts: 52
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    Steamhead said:

    Those look like small-tube radiators. Use the Burnham Slenderized chart in "E.D.R.".

    @Steamhead, I checked the Burnham section on page 190, it doesn't match up to what appears to be Crane radiators I have, ugh.
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
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    Your dining room radiator looks like a slenderized radiator, so it should be similar to the Burnham slenderized. Your Crane radiators should be similar to a tube radiator like an American Corto, Richardson, Weil-McLain Cameo, etc.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
    ranzerox
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,544
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    @ranzerox

    Use the thin tube ratings by Burnham or Weil Mclain. If its not exact it will be fine. Some of the old stuff is hard to find.

    You pick a chunk of cast iron about the same dimensions as what you have and go with it
    ranzerox