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EDR Calculation Check

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Hi,
I'm looking to replace my boiler. Current is an HB SMITH 6 Section boiler nameplate says 1290 Sq Ft Steam and 309,100 BTU. But it's got a conversion unit attached so this is questionable I guess.

I've attached an excell sheet with all the calcs for EDR of the radiators (2 pipe system). Does anyone care to comment on my totals? I came up with a total EDR of 993 and DOE of 317000.

I think my current boiler is sized correctly, great! Estimates I've gotten suggest I should go with a Burnham IN11.

Just looking for any thoughts or checking of my work.

Thanks in advance.

Comments

  • KC_Jones
    KC_Jones Member Posts: 5,737
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    For calculating boiler size you take your square foot calculation and compare that directly to the square foot rating on the boiler, don't add the pick up to that or you will oversize. So if you are at 992 you compare that to 1290 of your current boiler and you are 30% over sized.

    I suspect some of your sizes are off. At least two stand out to me. You have a rad that is 16" tall 2.5" deep, but you say it's 15 sq ft per section? That sounds really high to me. Another at 30" tall, 3.5" deep and 10 sq ft per section. I can't see these rads, but those dimensions and that sq ft seem way off. Pictures may help clear it up.
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
    EzzyTbigsteamedp
  • Steamhead
    Steamhead Member Posts: 16,840
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    What @KC_Jones said. There are enough different radiators out there that we'd need to see them to verify their capacities. Post some pics and we'll have a look.

    Also, where are you located?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    bigsteamedp
  • bigsteamedp
    bigsteamedp Member Posts: 20
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    Thanks for the replies. Here's a couple of pics of my big rads, they are BIG. One I can't take a good pic (office in my file) but it takes up almost a whole wall. The one long rad is on the ceiling in my basement (hobbit room in my file). The other I have two pics below is of a rad that works on convection heating a large space above in my living room. I'm in Worcester, Ma.
  • bigsteamedp
    bigsteamedp Member Posts: 20
    edited August 2017
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    Second try on the pics
  • Dave0176
    Dave0176 Member Posts: 1,177
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    I'd recommend two Weil McLain EG-55s rated at 521 sq ft steam each, that way you could modulate both of them.
    DL Mechanical LLC Heating, Cooling and Plumbing 732-266-5386
    NJ Master HVACR Lic# 4630
    Specializing in Steam Heating, Serving the residents of New Jersey
    https://heatinghelp.com/find-a-contractor/detail/dl-mechanical-llc

    https://m.facebook.com/DL-Mechanical-LLC-315309995326627/?ref=content_filter

    I cannot force people to spend money, I can only suggest how to spend it wisely.......
    bigsteamedp
  • bigsteamedp
    bigsteamedp Member Posts: 20
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    That sounds like an interesting plan, I will ask about it as I get quotes. my guess is nobody is going to want to do that though it's probably too complicated
  • KC_Jones
    KC_Jones Member Posts: 5,737
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    You had an offer from a great steam guy on here @Charlie from wmass on one of your other posts. Have you called him for a quote?

    https://heatinghelp.com/find-a-contractor/detail/charles-garrity-plumbing-and-heating
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
  • bigsteamedp
    bigsteamedp Member Posts: 20
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    I've contacted him, yes, multiple times. Unfortunately we have not been able to connect to obtain a quote. I've heard great things about his work.
  • Charlie from wmass
    Charlie from wmass Member Posts: 4,322
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    One would be better off splitting the boilers unevenly. This way you could have the larger boiler match the heat load of the building and the smaller one work for the pickup Factor and initial startup. Be warned that hooking in multiple Steam boilers to a single system requires proper piping more than any other system.
    Cost is what you spend , value is what you get.

    cell # 413-841-6726
    https://heatinghelp.com/find-a-contractor/detail/charles-garrity-plumbing-and-heating
    bigsteamedp
  • bigsteamedp
    bigsteamedp Member Posts: 20
    edited August 2017
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    @Charlie from wmass, left you a VM. Talk soon.