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Witten by Bernard Morgan (Engineer) & Adam Apperley (Marketing). Published: November 12, 2019. Updated: February 8, 2024

How long do boilers last?

The lifespan of a boiler, typically up to 15 years, depends on factors like brand quality, installation, and maintenance. Regular servicing, correct installation, and using premium brands can extend this lifespan. Planning a replacement around the 10-year mark is advisable to avoid inefficiencies and breakdowns.

Understanding your boiler’s lifespan and how to maximise it is crucial for efficient home heating. This guide covers essential factors influencing boiler longevity.

What affects a boiler’s lifespan?

  • Modern combi boilers last up to 15 years, with premium brands often offering better longevity.
  • Incorrect installation can significantly reduce boiler life.
  • Regular servicing.
  • If possible, choose a reliable brand like Viessmann, Vaillant, or Worcester Bosch are key to extending boiler life.
  • Buy a boiler with a stainless steel heat exchanger for longer life.

When to consider replacement

  • Start considering a replacement when your boiler reaches 10 years to avoid breakdowns during winter.
  • Boilers become less efficient over time, similar to other technologies like cars.
  • Delaying replacement can lead to higher energy costs.

How to increase the lifespan of a boiler

  • Regular servicing by approved installers is crucial.
  • Bleed radiators and install a magnetic filter to improve efficiency.
  • Use inhibitors after flushing the system and insulate pipes to maintain efficiency.
  • Avoid overworking the boiler and ensure it suits your property size.
  • Run the boiler in summer. Don’t let your boiler sit idle for too long. This will help prevent sludge build-up.
  • Insulate your pipes to reduce heat-loss, allowing your boiler to ‘work’ less intensely.

At Boilerhut we include a chemical flush, magnetic filter, limescale filter and a manufacturer-backed warranty for all our customers.

Boiler servicing

  • Annual servicing is essential for warranty and maximizes lifespan.
  • Choose a qualified, Gas Safe Registered engineer for servicing. Where possible, choose a manufacturer-approved or trained engineer.
  • Servicing includes checks on heat exchangers, electrical connections, pressure levels, and part replacements.

When Boilerhut installs a Viessmann boiler, we’re able to offer manufacturer-led servicing over the life of your boiler. This ensures your boiler is serviced correctly and lasts for years.

Parts and availability

  • Know your boiler’s age for repairs; parts are typically available for 12 years.
  • Difficulty in obtaining parts may necessitate a replacement.


Regular maintenance and understanding when to replace your boiler are key to efficient heating. For more information, keep reading or click the button for a free online quote.

After the best deal on premium boilers? Get your replacement boiler installed with Boilerhut:

  • Next day boiler installation.
  • ‘Excellent’ 5* customer satisfaction on Trustpilot.
  • Finance options available.
  • 10 to 12-year warranty on most boilers.
  • Fixed prices. No hidden extras.
  • Get up to three quotes for different-tier boilers.
  • Instant, no-obligation quote in less than 1 minute.

4 replies
  1. Paul Marshall
    Paul Marshall says:

    Is there a British made gas boiler and still a British owned company?

    Grant only does oil but does appear to be British owned?

    Don’t want to buy German, French or Dutch if it can be avoided. Need to support British manufacturing.


    • Bryn Lloyd
      Bryn Lloyd says:

      Hi Paul,

      Thanks for the enquiry, it’s much appreciated!

      As an installer, we will always recommend a manufacturer who can deliver a high-quality product every time and for this reason, we would suggest a company like Viessmann. However, Ideal offer an impressive range of boilers with over 100 years experience in British engineering.

      For more information on the brand, please take a look at some of our other articles:

      Ideal vs Viessmann
      Which Boiler is Best
      Ideal vs Worcester Bosch

      We hope this helps!

      Kind Regards,
      The Boilerhut Team

      • Paul Marshall
        Paul Marshall says:

        Thanks for the quick response. I’ve done some digging and Ideal is now owned by the French. It’s a shame that there doesn’t even appear to be a British owned gas boiler manufacturer anymore. Perhaps Grant will be spotting the opportunity?

        I guess I’ll just keep my 28 year old Ideal going for now (they were still British owned then!).

        Best regards,

        Paul M

        • Bryn Lloyd
          Bryn Lloyd says:

          No problem at all, Paul.

          If you ever have any more questions regarding your boiler installation, just let us know – we’re happy to help!

          Alternatively, you can get a free, no-obligation quote within minutes by clicking here.

          Thanks again,
          The Boilerhut Team

  2. Susan
    Susan says:

    If I have a boiler fitted by one company then get another to service it do I still get the 10 guaranty it the boiler brakes from the computer that installed it

    • Bernard Morgan
      Bernard Morgan says:

      Hi Susan, yes you can, but ensure that they are experienced with that brand and they follow the manufacturer’s schedule. If your boiler is a Viessmann, please contact Boilerhut on 029 2009 9898 and we can help.


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