The answer to 'how long will boiler last' is that a well-maintained boiler can typically last 15-20 years or more. The lifespan of a boiler depends on several factors, including the quality of the unit, how often it is used, and the maintenance it receives.
Proper maintenance, such as annual tune-ups and regular cleaning, can help extend the boiler's lifespan. Factors like the quality of the water, the number of people using the boiler, and the climate can also impact how long it lasts. With proper care and maintenance, many boilers can continue functioning efficiently for 15-20 years or more.