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Help w/EDR of this radiator

I have a radiator hanging from the ceiling of my garage. The dimensions are:

approx. 3 inches thick

the ends of each section are approx. 2 1/2 inches wide

the middle tubes of each section are approx. 1 1/2 inches wide

if I were to stand it up with the inlet on the bottom, it's 27 1/2 inches tall

each section is approx. 12 1/2 inches wide

there are 6 sections total

I posted in another thread that it's currently vented with a Hoffman 1, but it's actually a Hoffman 2.

What would be the best estimate for an EDR of this radiator?




  • Steamhead
    Steamhead Member Posts: 16,732
    Each of those sections

    is 9 square feet. So your rad is 54 square feet. It's a standard wall rad that happens to be hung from the ceiling.

    Why is it there? Because antifreeze for cars hadn't been invented yet.

    The Hoffman #2 vent is a vacuum type, which doesn't work well with oil or gas firing. If you don't want much heat in there, a Gorton #4 would be a good replacement.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
  • ryanr256
    ryanr256 Member Posts: 49

    Thanks for the info. The house was built in 1928 so you're probably right about the anti-freeze. I think it was originally coal, but currently we have natural gas.

    The ceiling of the garage is the floor of our dining room. Our garage is in the basement. While I don't need it to be 70 degrees, I would like to keep some heat there. Plus a good portion of the main is looped through the garage.

    Again, thanks. This will allow me to complete JP's spreadsheet for the venting of the system.

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