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SPENCER RF 240 steam Boiler

Mike20 Member Posts: 37
Hello fellow Boiler people

Can any one tell me the BTU input rating of this Old Girl


It is a Low pressure steam, steel,  fire tube boiler currently burning #2 Oil  and it is a Monster

I am looking to replace and Down size to a nice 3 pass federal Boiler

The building is 24 apartments and 21,000 square Ft  located in the Bronx, NY

Thank you

Mike G


  • Sizing an old boiler

    Is this 1-pipe, or 2- pipe? Are you restricted to oil?

    Are you planning this for next spring, or must it be installed ASAP?

    Can you size the new one from the radiation EDR, as relying on what was there before may result in repeating someone else's mistake.--NBC
  • Dave in QCA
    Dave in QCA Member Posts: 1,764
    edited November 2013

    Have you had the current boiler evaluated by a boiler repair specialist? By that, I mean someone who is qualified to repair a fire-tube boiler. The reason that I ask is that these old beasts can often keep on going past the 100 year mark. The expendable part are the tubes, and re-tubing a boiler is not that huge of a deal. The rest of the beast is very heavy plate steel and may be in very good condition. You never know unless you have it evaluated by a qualified professional.

    The good thing about a fire tube boiler is their efficiency. With a finely tuned burner and turbulators inserted in the flues, you are going to have an efficiency in the 80-85% for sure. Also, you generally can down fire this type of boiler as much as 50% with no loss in efficiency.

    As for the INPUT rating that you are looking for, that boiler should be rated in H.P., Horsepower. See if you can find that and someone here will work out the conversion. Of course, if you are working on the question of sizing the new boiler, a complete survey of the radiators in the building is what you need to do.
    Dave in Quad Cities, America
    Weil-McLain 680 with Riello 2-stage burner, December 2012. Firing rate=375MBH Low, 690MBH Hi.
    System = Early Dunham 2-pipe Vacuo-Vapor (inlet and outlet both at bottom of radiators) Traps are Dunham #2 rebuilt w. Barnes-Jones Cage Units, Dunham-Bush 1E, Mepco 1E, and Armstrong TS-2. All valves haveTunstall orifices sized at 8 oz.
    Current connected load EDR= 1,259 sq ft, Original system EDR = 2,100 sq ft Vaporstat, 13 oz cutout, 4 oz cutin - Temp. control Tekmar 279.
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