Boiler Lifespan — What to Expect
The average gas boiler lasts 10–15 years. Premium brands with good maintenance records can last 20+ years; poorly maintained budget boilers may fail within 7–8 years.
Average Lifespan by Brand
- Worcester Bosch: 12–15+ years
- Vaillant: 12–15 years
- Baxi: 10–14 years
- Ideal: 10–12 years
- Alpha: 8–12 years
Factors That Extend Boiler Life
- Annual servicing
- Magnetic filtration installed
- Correct system pressure maintained
- Good water quality (water softener in hard water areas)
- Premium brand choice
Factors That Shorten Boiler Life
- No annual service
- Hard water (limescale build-up)
- Sludge and debris in the system
- Ignoring early warning signs
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