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Help - Need BTUH cap

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BHVACR
BHVACR Member Posts: 1
in THE MAIN WALL
IMG_7821.jpeg IMG_7820.jpeg

Any of you guys ever run into these old units. I am getting ready to retrofit the boiler system in an apt complex that has these in, I can't find any BTUH cap data on them. Any chance anyone here would have that info? They look very similar to the Burham DUO RAD

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  • STEAM DOCTOR
    STEAM DOCTOR Member Posts: 2,584

    Do a heat loss calculation

  • winnie
    winnie Member Posts: 64

    Looks like they are nominally 10K BTU rated, but the info is from an ad that doesn't provide temperature deltas, flow rates, etc.

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    https://www.usmodernist.org/AB/AB-1955-07.pdf page 136

    Given that the label you show say that PEBCO is a division of Burnham, and that the unit looks very very similar to the Burnham B50 units (from Lancaster, PA even) shown in https://heatinghelp.com/assets/documents/Burnham-America.pdf on page 89, I would bet a couple of beers that they are the same.

    GGross
  • GGross
    GGross Member Posts: 1,840

    I'd bet @winnie is right on the money. It's hard to say what temp and delta they are basing the ratings on but often you will see it based on a 180 with a 20 delta at 68 entering air temp *this is an assumption*. That being said if you are trying to add up all these units to get the boiler size that's not the right way to size a forced water boiler system. Size the boiler for the load not the emitters

    mattmia2

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