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steam oil to gas conversion

PaulPaul Member Posts: 244
how much will you save converting a modern oil steam boiler to a gas steam boiler approx. oil in mass is double the cost of gas. thx


  • Jamie HallJamie Hall Member Posts: 6,058
    If it's really a modern oil boiler

    the efficiency is pretty good already; you may have slightly better efficiency on gas, but your savings will come from the difference in the price of the fuel, not from replacing the boiler.  Which is considerable.

    Some boilers can be converted from oil fired to gas fired (not all); you might look into that first.

    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

    Hoffman Equipped System (all original except boiler), Weil-McClain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • BobCBobC Member Posts: 4,245
    How is it sized?

    If the current steam setup is well matched to the heating load (EDR) the savings will be the difference in fuel costs, last year oil was running about $3.50 and NG in the Boston area was about $2.20 for the equivalent amount of gas (1.4 therms). We won't know what the cost is till the gas company posts this years winter rates that take effect at the end of October.

    If that steam boiler is oversized you can dial the output down to match the load by drilling the correct orifice size for the input BTU you need and that can save some fuel.

    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
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