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Plant Engineering Calculator

Boiler Oxygen Trim Savings Calculator — Excess O₂, Fuel Reduction & Payback

Screen boiler oxygen-trim economics from measured fuel use, proposed fractional fuel reduction, operating hours and fuel price, with annual fuel, cost and simple-payback outputs.

Inputs

Results

Fuel saved 7.50 kg/h
Annual fuel saved 45000 kg
Annual cost saved $22500
Simple payback 0.44 years

Formula

fuel saved=baseline fuel×saving fraction; annual saving=fuel saved×hours×fuel price.

Worked example

A boiler burning 500 kg/h with a validated 1.5% trim opportunity saves 7.5 kg/h at the same useful duty.

Assumptions & limits

  • Fuel-saving fraction must come from combustion testing or a defensible before/after model.
  • Never reduce excess air below safe combustion, CO, emissions or burner/OEM limits.

FAQs

What does this Boiler Oxygen Trim Savings Calculator calculate?

Screen boiler oxygen-trim economics from measured fuel use, proposed fractional fuel reduction, operating hours and fuel price, with annual fuel, cost and simple-payback outputs.

Can I use the result for final equipment selection?

Use it as a transparent engineering and energy-screening result. Verify final decisions with measured site data, OEM curves, applicable standards and operating limits.

Why does MAXScanner show assumptions?

Plant calculations can look exact while depending heavily on operating assumptions. Showing them makes scenarios auditable and easier to compare.

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Last updated: 17 September 2026