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EDR help please

So my stoker bit the dust. I have 4 natural gas steam rads upstairs. I tried my best but can’t come up with the correct sized boiler. I am getting a penco or National as that’s what’s in my budget. These rads are 25 inches high on the four corners but 22 inches by the tube height. The 14 section is 23 inches long let me know if we need anything else measure etc also I can pipe the new boiler right below a union that’s connected to my old stoker thanks in advance ps is it 30% in addition to the edr for the piping down in basement?

Comments

  • KC_Jones
    KC_Jones Member Posts: 5,113
    First, once you get the EDR, you add nothing to that, you use that number to compare directly to the manufacturers rating in sq ft of steam.

    To help we would need the measurement of the depth of each radiator to confirm the ratings.

    that said I’d estimate you are around 125-150 based on those pics, which basically means you need the smallest boiler made, and even that will be too big.

    Measure the depth (front to back) and we can tell you exactly.
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
    hankwylerjr
  • hankwylerjr
    hankwylerjr Member Posts: 110
    edited September 1
    The depth is 5 3/4 it’s only a one bedroom efficient apartment but four rooms total 
  • Steamhead
    Steamhead Member Posts: 15,516
    edited September 1
    Those are "small-tube" radiators. If you have Dan's book "E.D.R.", use the chart for the Burnham Slenderized or Weil-McLain Junior radiators. Ratings were pretty much standardized by the time these were made.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    hankwylerjrj a_2
  • hankwylerjr
    hankwylerjr Member Posts: 110
    i bought Dans book off Amazon gave it to my uncle and he recently passed away from the coronavirus and I cannot find it anywhere that’s one of the reasons I’m posting this here need to know soon because supply house only have a couple left in that smaller size 
  • pecmsg
    pecmsg Member Posts: 3,065
    I would take @KC_Jones guess over any supply houses. 
    Get the smallest possible. 
  • dabrakeman
    dabrakeman Member Posts: 250
    2.4 per section. 33.6 per rad. 134 sqft EDR total.
    hankwylerjrAlan (California Radiant) Forbes
  • hankwylerjr
    hankwylerjr Member Posts: 110
    No kidding? That’s probably the three sections Penco I would need much appreciated 
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 3,640
    Do they make a 2 section Penco? I know Crown boiler and Weil McLain have 2 section boilers for Hot Water systems. Not sure about steam boilers.

    But you are good to get it ASAP, be it a 2 section boiler or 3 section boiler.

    Good Luck with your project,

    Mr. Ed
    Edward Young
    Retired HVAC Contractor from So. Jersey.
    Services first oil burner at age 16
    P/T trainer for EH-CC.org

    hankwylerjr
  • Steamhead
    Steamhead Member Posts: 15,516
    @hankwylerjr , this Pennco model?

    https://penncoboilers.com/sites/default/files/240009892 Pennco 16 Sell Sheet 11-22-21 WEB.pdf

    If so, it's a re-branded Dunkirk. These boilers are VERY finicky when it comes to near-boiler piping. They have 2-1/2" steam outlets, which must not be reduced in size or you'll get wet steam and drastically reduced efficiency.

    Read the manual. If you or your installer have questions, post them here.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    hankwylerjr
  • hankwylerjr
    hankwylerjr Member Posts: 110
    smallest they have is a 3 section penco and yes those are rebranded dunkirk. Unfortunately after a chimney inspection I need a liner but not in budgets this year I don’t hate the power vents but may not have a choice simple install however is there a special kit that is optional with these units or can I either power or direct vent them?