Energy & Sustainability worked example

Boiler Efficiency Savings at 63% savings capture rate: a worked example

This worked example runs the boiler efficiency savings numbers for a tougher week than the baseline: 63% savings capture rate instead of the typical 88%. Estimate boiler fuel savings from annual fuel use, fuel cost, savings capture, and implementation cost.

The inputs for this scenario

  • Annual boiler fuel use reduced: 4,200 MMBtu (held at the documented default)
  • Delivered fuel cost: 9.4 $ / MMBtu (held at the documented default)
  • Savings capture rate: 63 % (the input this scenario stresses; the baseline uses 88)
  • Implementation and verification cost: 6,500 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Captured boiler fuel savings = annual boiler fuel use reduced × delivered fuel cost × savings capture rate.
  • Net boiler efficiency savings works out to 31,372 $ at these inputs, and this is the headline figure for the scenario.
  • Savings per avoided MMBtu works out to 7.47 $ / MMBtu at these inputs.
  • Captured boiler fuel savings works out to 24,872 $ at these inputs.
  • Implementation and verification cost works out to 6,500 $ at these inputs.

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 23.93% below the baseline at 31,372 $.
  • Use it when justifying a boiler efficiency measure, comparing competing projects, or reconciling modeled versus realized savings during measurement and verification. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Net boiler efficiency savings: 31,372 $ (headline result)
  • Savings per avoided MMBtu: 7.47 $ / MMBtu
  • Captured boiler fuel savings: 24,872 $
  • Implementation and verification cost: 6,500 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Boiler Efficiency Savings calculator, set savings capture rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.