Energy Academy
System-Specific Maintenance5 / 13

Boiler & Fuel System Maintenance

Cleaning, scaling removal, combustion tuning, pressure relief testing; efficiency loss timeline.

10 min read · Jacob Willis, Net Zero Lead · Last reviewed July 2026


Boilers and fired heating plant are among the largest energy consumers in most facilities, and among the most sensitive to maintenance: small lapses translate directly into wasted fuel, hour after hour. Because fuel is the dominant lifetime cost of a boiler, boiler maintenance repays itself many times over in saved energy. This lesson covers combustion, fireside fouling, waterside scale, heat recovery, controls, and a maintenance routine, complementing the boilers and fired systems course with the maintenance view.

In this lesson

  • 01Combustion: the heart of efficiency
  • 02Fouling, scale and heat recovery
  • 03Controls, insulation and routine
  • 04Sources and further reading