BoilerBuying Guide2026-02-24
How Long Does a Combi Boiler Last?
A well-serviced combi lasts 12–15+ years; neglect and hard water shorten it.
Knowing your combi's expected lifespan helps you plan a replacement on your terms.
Typical lifespan
With annual servicing, most combi boilers last 12–15 years or more; premium brands can exceed that.
What shortens it
Skipped servicing, sludge, hard-water scale and constant re-pressurizing accelerate wear and shorten lifespan.
Key takeaways
- Expect 12–15+ years with servicing
- Sludge and scale shorten life
- Annual servicing extends it
- Plan replacement proactively
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