Assessment & Retrofit8 / 10
Retrofit & Replacement Options
Burner upgrades, condensing conversions, and replacement decisions.
9 min read · Jacob Willis, Net Zero Lead · Last reviewed July 2026
Once you've assessed a boiler plant, the question is: fix it, or replace it? And if you replace, what with? The answer depends on age, efficiency, capital budget, and your heating system's maturity.
In this lesson
- 01The retrofit ladder: improvements you can make without replacing
- 02Boiler replacement: what are your options?
- 03Decision tree
- 04Procurement and installation
- 05Sources and further reading