How Long Can a Boiler Last: Tips to Extend Its Lifespan

May 28, 2025

The long, cold winters of Canada mean you have to take better care of your boilers. During these months, we probably keep our boilers on for 8 to 9 hours daily. And with this extensive kind of usage, how long can a boiler last here?

On average, boilers last for about 15 years, but this can vary depending on a few factors. Where you live, the water quality, and maintenance can all extend or shorten the lifespan. 

Lifespan of a Boiler: What’s the Average?

So, let’s get right to it: how long can a boiler last? Generally, even in Canadian winters, most boilers last for 10 to 15 years. If you take good care of it, with timely maintenance, it can stretch to 20+ years.

In countries where the installation follows strict standards and routine upkeep, boilers easily last for more than 20 years

Here in Canada, the typical boiler lifespan falls within the 15-17 year range. That too will depend on the following factors:  

  • The quality of the installation.
  • The make and model of the unit.
  • How often is it serviced?
  • Water quality as hard water, can reduce efficiency over time.
  • How heavily the boiler is used during colder months.

How Long Do Different Types of Boilers Last?

Here are a few of the most common types of boilers we use in Canada and how long each lasts:

Combi Boilers

Combi or combination boilers are a popular choice in Canadian homes. These require only one compact unit for both heating and hot water supply. If you think about how long do combi boilers last, it's the same as traditional boilers: 10 to 15 years.

System Boilers

System boilers are mostly used in residences and are more common in multiple bathrooms. These boilers store hot water in a cylinder. This way, you can get high water pressure at multiple taps.

These boilers last about 12 to 16 years. With controlled usage and regular maintenance, it can last longer.

Conventional (Regular) Boilers

The regular boilers use both a hot water cylinder and a cold water storage tank. You will mostly find these boilers in old homes. Conventional boilers are easy to maintain, yet can last up to 20 years.

The downside of these boilers is that they take up more space. Plus, they are not as energy efficient as newer systems. 

Electric Boilers

Less common in our homes, electric boilers can be great for many homes where gas access is short. These boilers can last about 8 to 12 years. You don’t have to spend a lot of time and money on maintenance. But, electricity costs can be higher.

Signs Your Boiler May Be Nearing the End

Boilers, too, give subtle signs when they’re ready to retire. Here are a few common red flags to watch out for:

  • It’s over 12–15 years old.
  • Your energy bills are going up without explanation.
  • You hear strange noises like banging or whistling.
  • The boiler needs frequent repairs.
  • Uneven heating or slow hot water.

If you’re noticing more than one of these signs, talk to a heating professional about a replacement.

How to Extend the Life of Your Boiler

Yes, it is possible to extend the lifespan of a boiler. Here’s what you need to remember: 

  1. Get an annual service: A service from a professional technician can save you repair costs. Experts can spot early problems and ensure everything is working as it should.
  2. Install a water softener: If you live in a hard water area, this can prevent mineral buildup in the system.
  3. Bleed your radiators: This keeps the system balanced and efficient.
  4. Don’t ignore small issues: If you hear weird sounds, it’s wise to consult a professional. Also, any delays in heating could lead to a bigger problem. 

Conclusion

So, how long can a boiler last? In Canada, you can expect the boilers to last from 10 to 15 years. This can be longer with care. If you’re unsure about the state of your current boiler, now might be the perfect time to get professional advice. The team at Surrey Plumbing and Heating is here to help you make the right choice.