Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

Pre 1935 Steam Wall Radiators

Chris MaderiaChris Maderia Posts: 120Member
Can anyone out there help in figuring out how to calculate SqFt EDR for some old Wall Steam Radiators and turning them into btu. I have attached a picture of the type of radiator. It is firgure 21.

In Room 1 I have 4 on 2 walls that are 2'x 1' in a bank of 4 and 1 wall that has 1 2' x 1' in a bank of 10.

In Room 2 I have 2 that are 2'x 1' in a bank of 20.

Thanks in advance for any help you may give....

Comments

  • SteamheadSteamhead Posts: 13,205Member
    Each section of standard wall radiation

    whose measurements are probably closer to 21 x 13 inches, is rated at 7 square feet EDR. On steam, each square foot EDR gives off 240 BTU. On hot water the output will vary with the water temp, but with a boiler temp of 180 degrees F and a 20-degree delta-T, each square foot will emit 150 BTU.

    BTW, #24 is definitely pre-1935.

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
    All Steamed Up, Inc.
    "Reducing our country's energy consumption, one system at a time"
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Baltimore, MD (USA) and consulting anywhere.
    https://heatinghelp.com/find-a-contractor/detail/all-steamed-up-inc
  • Mike T., Swampeast MOMike T., Swampeast MO Posts: 6,928Member
    Looking Through \"EDR\"

    Can positively identify only one: #23 It is an American Rococo #7-A. Should measure 13 5/16" h x 21 7/8 l. EDR is 7 sq. ft.

    The Rococo was made in other sizes: 13 5/16" x 16 5/8" has 5 sf EDR; 29 1/16" x 13 5/16 has 9 sf EDR.

    Sizes were rather standardized so you should be able to compare #21 and #22 to the Rococo measurements. Looks like #22 is either 5 or 7 sf; #21 probably 14 but maybe 10 sf.

    #24 unlike anything in EDR. Looks like they tried to pack some "extra" radiation surface into a smaller area. By eye I'd say 5 or 6 sf.

    #20 looks like it could be a Lincoln Wall Radiator. If so, EDR is 3 sf per section (38"); 2½ sf per section (32"); 2 sf per section 26"; 1½ sf per section 20".

    You should be able to use the measurements for the Lincoln for #19 as well.
This discussion has been closed.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!