How Long Does a Boiler Last? (2026 Lifespan Data)

Boiler lifespan in 2026: cast iron 30+ yrs, modern condensing 15–25 yrs. Brand benchmarks and the signs to plan replacement.

About HomeScore

HomeScore forecasts repairs, replacement timing, and total ownership cost across 40+ home systems. Used by 8,200+ buyers, sellers, and long-term homeowners in 2026.