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National U.S. Radiator

JAS Member Posts: 1
Our house has a National U.S. Radiator Boiler #101-10, Division of Crane Co Johnstown PA. Our house was built in 1929 and I do not know the brand of boiler we had before, but moved the above boiler in aprox 18 years ago from a funeral home they were tearing down. This is a gravilty flow system, since I have the enclosed water tank upstairs in a closet. We do not have a pump on this system. I am wondering if anyone has any information on this unit and how much space it will carry, etc. In the 70's they remodeled the front rooms and put baseboard radiators in the living room only. I want to put back the original up right radiator and I am wondering if this can be done without any pump. (everyone around Central Illinois thinks I need a pump and seperate thermostat. The orginal radiator is 2 feet high and aprox 10 sections long. Will I need a second in a room that is 28X15? I am also thinking I am needing a new thermostat and what connects to the boiler. Thanks for your help.


  • Steamhead
    Steamhead Member Posts: 16,710
    You can pipe a radiator in that system

    to work by gravity, and if done right it'll be fine.

    To see if there was a second radiator in there, go to the basement and look up into the joist spaces. If the radiators in the other rooms are under the windows, look near where the living room windows are or were. If not, look in whatever part of the living room corresponds to the placement of the other rads. Another place to try is near the stairway, if it comes down into the living room. You're looking for old holes that the pipes used to come up thru to feed the radiator. Also look for tees in the main lines that are plugged off.

    Sizing and installing the radiators is best left to a pro. The #101-10 boiler (it is a gas-fired boiler, right?) is rated 1080 square feet EDR on hot water, which translates to 162,000 BTU per hour available to the radiators (the "net" rating).

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