Assessment & Retrofit7 / 10
Assessing a Boiler Plant
Age, efficiency, turndown, and fit to actual load.
10 min read · Jacob Willis, Net Zero Lead · Last reviewed July 2026
When you walk up to a boiler plant, how do you quickly assess whether it's a problem? Age is not the whole story: a well-maintained 25-year-old boiler can outperform a neglected 5-year-old one. Here's what to look for.
In this lesson
- 01The big picture: age, size, and load
- 02The burner: combustion quality
- 03The boiler exterior
- 04Maintenance history
- 05The distribution system
- 06Red flags: likely to need action
- 07Quick assessment score
- 08Commissioning a boiler assessment
- 09Sources and further reading