Energy & Sustainability worked example

Boiler Efficiency Savings at 99% savings capture rate: a worked example

This scenario runs the boiler efficiency savings calculation on the strong side: 99% savings capture rate, with every other input held at its documented default. an energy or maintenance manager needs to value a boiler efficiency improvement

The inputs for this scenario

  • Annual boiler fuel use reduced: 4,200 MMBtu (unchanged)
  • Delivered fuel cost: 9.4 $ / MMBtu (unchanged)
  • Savings capture rate: 99 % (raised for this scenario; the documented default is 88)
  • Implementation and verification cost: 6,500 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Captured boiler fuel savings = annual boiler fuel use reduced × delivered fuel cost × savings capture rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 45,585 $ for net boiler efficiency savings, the number this scenario is built around.
  • At this operating point the engine returns 10.85 $ / MMBtu for savings per avoided mmbtu.
  • At this operating point the engine returns 39,085 $ for captured boiler fuel savings.
  • At this operating point the engine returns 6,500 $ for implementation and verification cost.

How this compares with the baseline

  • Against the tool's baseline example, where savings capture rate sits at 88% and the headline result is 41,242 $, this scenario comes in 10.53% above the baseline at 45,585 $.
  • Use it when justifying a boiler efficiency measure, comparing competing projects, or reconciling modeled versus realized savings during measurement and verification. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Net boiler efficiency savings: 45,585 $ (headline result)
  • Savings per avoided MMBtu: 10.85 $ / MMBtu
  • Captured boiler fuel savings: 39,085 $
  • Implementation and verification cost: 6,500 $

Run it with your numbers

  • Every input above is editable in the live Boiler Efficiency Savings calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.