Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Efficiency Question Regarding Burnham Commercial Boiler

Brad White_78
Brad White_78 Member Posts: 15
Oil input is 16.6 GPH or 2,324 MBH if 140,000 BTU's per Gallon. This would put you at 83.52%

Gas input is 2,396 MBH and this would put you at an even 81% combustion efficiency.

With net I=B=R values (1,507 steam MBH output) this would take you down to 77.64%.


  • Jim_53
    Jim_53 Member Posts: 8
    Burnham Commercial Boiler Thermal Efficiency

    What is the thermal efficiency for a Burnham Commercial Steam Boiler #V1110, with a gross output of 1941 mbh? Thanks!

  • Thermal Efficiencies

    The tested and published Thermal Efficiencies of the V1110 boiler for Oil are 83.5% and 81% for Natural Gas. Combustion Efficiencies are 84.8% for Oil and 82.2 for Gas. These are from the IBR Ratings manuals published by The Hydronics Institute Division of GAMA. Hope this helps.

    Glenn Stanton

    Manager of Training

    Burnham Hydronics

    U.S. Boiler Co., Inc.
  • Brad White_78
    Brad White_78 Member Posts: 15

    Thanks for clarifying-

    I always thought that the published ratings in the literature were combustion efficiencies and that thermal efficiencies were a tad less (accounting for jacket losses and other parasitic losses). I appreciate you being more detailed than I, as usual.

  • StackDraft
    StackDraft Member Posts: 1
    Burnham Boiler Thermal Efficiency

    Are the combustion and thermal efficiency ratings based on high or low fire?
This discussion has been closed.