How long does a boiler last?
A boiler typically lasts 20 to 30 years. Where yours falls in that range depends on how it was installed, how hard it works and how well it's maintained.
When will yours need replacing?
Enter the install year to see when replacement is due.
Opens the free calculator with this item filled in.
What affects its lifespan
- Water treatment and annual flushing
- Cast-iron vs. steel vs. high-efficiency condensing design
- Short cycling from oversizing
- Service of burners and controls
Signs it's near the end
- Leaks at sections or the heat exchanger
- Frequent pressure or pilot problems
- Rising fuel use
- Parts that are hard to source
Questions
- How long does a boiler last?
- Typically 20 to 30 years. CapexClock uses 25 years as its default, and you can change it for your building.
- When should I start saving to replace a boiler?
- As soon as it's installed. Spreading the cost over its 20–30 year life keeps the replacement from landing as a surprise. The mini calculator on this page shows a monthly amount for yours.
- How is a boiler priced in the calculator?
- By default it's priced per building. Enter your own quote or recent invoice; CapexClock never fills in costs for you.
Plan every replacement in your building
List your roof, HVAC, water heaters and more to get a 10-year forecast and one monthly reserve number.
Open the free CapEx calculatorOther hvac lifespans
- Gas furnace 15–20 years
- Central AC / condenser 12–15 years
- Heat pump 12–15 years