efficiency of +20 year old Weil-Mclain oil boiler P366(HE)?

Discussion in 'Boiler Forum' started by hillpc, Sep 23, 2009.

  1. hillpc

    hillpc New Member

    Sep 23, 2009
    south jersey
    The boiler with Beckett AF burner was here when I moved in. I assume
    the HE stands for high efficiency, but what was that 20 years ago? I
    could keep this boiler going for a long time, but wanted to check if
    it's worth it to replace with new. The Weil-McLain website has a
    calculator but doesn't have the info I need. It shows a 78% default
    efficiency; going from this to 86% or so saves me a little over $200/
    year (at $2.40/gallon). Seems like that'll take quite a while to
    recoup at a boiler equipment only cost of over 2 grand.
  2. flamefix

    flamefix New Member

    Sep 4, 2009
    Heating engineer in the UK licensed to fit service
    Exeter, England
    A flue gas analyser with the oil flow rates set should give you some idea of the efficiency. A modern condensing oil boiler will give you 95-7% efficiency.
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