The answer to 'lifespan of boiler' is that the average lifespan of a residential boiler is 15-30 years, depending on the type, quality, and maintenance of the unit. Well-maintained boilers can last towards the upper end of that range, while neglected or low-quality boilers may only last 10-15 years. Proper annual maintenance and servicing by a qualified HVAC technician is key to maximizing the lifespan of your boiler.
Boilers that are used frequently or in harsh environments may have a shorter lifespan, while high-efficiency and well-insulated boilers can last longer. Regularly replacing key components like the burner, heat exchanger, and controls can also extend the overall life of the boiler. When a boiler starts to become less efficient or requires more frequent repairs, it may be time to consider replacing it with a newer, more energy-efficient model.