Which Boiler Brand Is The Most Reliable 2024?

Buying a new boiler in the UK can be overwhelming, confusing, and expensive. Since it&#;s not something anyone would buy regularly, what are the most reliable boiler brands in the UK?

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Key Takeaways

After all, according to Checktrade, a new boiler can cost anywhere between £1,200 and £10,000, not including installation.

While it is unlikely you&#;ll be buying the top-of-the-range biomass boiler at £10,000, we&#;re going to assume you&#;re in the market for a normal:

• Combination (combi)
• System
• And a conventional boiler.

These types typically average around £1,500 without installation.

However, the UK market is dominated by four boiler manufacturers, who, according to the Clean Heat Market Mechanism (CHMM), sell around 1.5 million gas boilers a year.

Before we review the most reliable boiler brands in the UK, let&#;s discuss what makes them so dependable.

What Makes A Boiler Brand Reliable?

When browsing through boiler brands available in the UK market, several factors should be considered, including:

• Boiler Brand Reputation
• A brand&#;s reputation is built over time. To establish a solid reputation, a brand must:
• Meet customer expectations
• Ensure its product performs well
• Remain reliable throughout the product&#;s lifetime

User reviews and industry awards provide valuable insight into a brand&#;s reputation.

Warranty And Guarantees

Brands that believe in their products will offer comprehensive warranties and guarantees. Most major brands offer warranties of up to 10 years.

Always read through the agreement and confirm what is covered, whether it can be extended, and what violates it.

If you&#;re curious about which brands to avoid, reviewing their warranties can help. A poor warranty often indicates a poor product.

Energy Efficiency

Since , all UK boilers must comply with the Energy Related Products methodology (ErP) rating system used in the EU. Also, all gas boilers installed into existing systems in England must be at least 92%.

Many major boiler brands are investing in improving their product&#;s efficieny ratings.

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After-Sales Services And Client Support

There&#;s nothing worse than investing in a product with a long lifespan only to discover that they don&#;t answer their phones.

A reliable boiler brand will have a strong customer service network, with easy access to engineers and spare parts if needed.

Trust Your Gas Safe Registered Engineer

Every Gas Safe registered engineer will have their preference based on experience. These engineers can also confirm whether the boiler:

• Quality components
• Are easy to maintain
• And have new technological features that work

With their wealth of knowledge about boilers, it&#;s always a good idea to ask them for their opinion or talk to an industry expert.

We&#;ve spoken about the four leading boiler brands in the industry. All these brands are incredibly reliable, but who are these titans of the industry?

Top Four Selling Boiler Brands In The UK

The top four selling boiler brands in the UK, according to the CHMM, are:

• Worcester Bosch
• Vaillant
• Ideal
• And Baxi

All these brands score incredibly well on Trustpilot, with scores all above 4.3 out of 5.

But let&#;s discuss who these reliable boiler players are.

Worcester Bosch

As one of the leading boiler manufacturers in the UK, Worcester Bosch has earned a reputation for reliability. Worcester Bosch produces and sells over 500,000 boilers annually and also sells renewable energy solutions such as heat pumps and solar water systems.

On Trustpilot, Worcester Bosch has a solid 4.6 out of 5 rating.

The company&#;s boiler range offers 5 to 12-year warranty periods, depending on the model you purchase. Worcester Bosch also provides live chat support, which is a great bonus.

One of the brand&#;s most recommended models for reliability is the Worcester Bosch Greenstar Life. This combi boiler is part of the latest range offered by the company and has improved on its predecessor features with its:

• Efficiency
• Operation sound
• And is sleeker

The Greenstar Life boiler range also supports smart thermostats, and customers can extend the warranty for up to 12 years.

Vaillant

Founded in , Vaillant is a German brand with a long history of innovation in the heating industry. The company now focuses on improving efficiency and renewable energy products like heat pumps.

Vaillant also sells around 500,000 annually and is one of the largest boiler manufacturers in Europe. The company currently has a UK manufacturing hub.

As you&#;d expect from a brand with its reputation, the standard warranty period for its boilers is five years, which can be extended up to 10 years. However, your boiler must be installed by a Vaillant Advanced Installer and maintained with genuine manufacturer parts.

The brand scores very well on Trustpilot with a 4.3 out of 5 rating.

One of Vaillant&#;s most reliable and popular models is the Vaillant ecoTEC Plus Combi Boiler. It is a high performer, exceptionally efficient, reliable, and offers smart control features.

With its smart control features, homeowners can monitor their energy use and adjust heating schedules, contributing to lowering energy bills.

Ideal

Founded in , Ideal is a well-established British brand manufacturing boilers for over 100 years. Known for selling affordable and reliable heating solutions, Ideal offers a wide selection of products, including:

FuShiDe Boiler supply professional and honest service.

• Combi
• Heat only boilers
• And more!

The British boiler brand is well-known for being reliable and keeping up with the times. It tops the leaderboard on Trustpilot with a 4.8 out of five rating.

Also, in recent years, the company has seen giant leaps in sales, selling between 400,000 and 500,000 boilers a year.

Ideal offers a standard warranty of 5 years on boilers. However, depending on the boiler type and if installed by an Ideal-accredited installer, this can be extended to 10 or even 12 years. It&#;s also worth mentioning that the brand&#;s warranties cover parts and labour!

The comprehensive warranty gives homeowners peace of mind that their boiler will be supported in any issues.

Ideal&#;s Logic+ (C24, C30 and C35) Combi Boiler model is the most recommended and praised for reliability and performance. It also received the Queen&#;s Award for Enterprise.

The boiler itself is compact, operates quietly, and is energy efficient. It also has an LCD display, is simple to operate, and can be linked to a smart thermostat.

Baxi

The last of the big four boiler manufacturers Baxi is a British company which was founded in .

Baxi is developing new renewable energy products and is known for its customer care. It serves both the residential and commercial sectors.

While the standard warranty the company offers is three years, it can be extended to 10 years if it is the:

• Correct model
• Installed by a Baxi-accredited installer
• And uses only genuine Baxi parts

A valid warranty will cover parts and labour.

Baxi sells between 300,000 and 400,000 units a year, making it a popular choice among the British public.

The company scores well on Trustpilot, with a public rating of 4.6 out of 5. Baxi&#;s most recommended boiler model is the 800 Combi Boiler (which we don&#;t currently stock).

Now that we&#;ve reviewed all the big brands, you may be wondering if there is a reliable underdog you can back.

Well, lucky for you, there are options for reliable underdog boiler brands.

Other Reliable Boiler Brands

While the top four players in the industry dominate sales in the UK, other brands also need to be highlighted for their reliability.

These other reliable boiler brands include the following:

Alpha Boilers

Alpha Boiler is known for its value-for-money products and has, over the years, earned the reputation of being a reliable and quality brand. The brand was considered unreliable in the past, but that has changed.

Depending on the model you buy, warranties range from two to ten years. However, most of Alpha&#;s boilers come with a five-year warranty plan. Alpha&#;s comprehensive warranty plans cover parts and labour as long as the T&Cs are followed.

The brand ranks well on Trustpilot, with a rating of 4.7 out of 5. While Alpha boilers are not among the four major manufacturers, the company does sell around 200,000 to 300,000 units per year.

Alpha&#;s most recommended model for reliability is the Alpha E-Tec Plus Combi Boiler, which is known for combining affordability and efficiency at the right price. This model range comes with a 10-year warranty when installed by an Alpha-approved engineer.

Viessmann

Viessmann is a German company that was founded in and has gone on to build a strong reputation for being:

• Innovative
• A quality product
• Sustainable
• And reliable

The company offers a comprehensive warranty across the product range, starting with a five-year agreement. If installed by a Viessmann-trained installer and keeping components inside the boiler to genuine parts, the warranty agreement can be extended to 10 years.

Viessmann is known for its comprehensive warranties and honouring them.

The company is an international player in the hearing industry, selling over 500,000 units annually globally.

Viessmann&#;s most reliable model range is their Vitodens 100-W Combi Boiler. This range of boilers is known for being:

• Highly efficient
• Quiet operation
• And is easy to integrate with smart home systems

It features a stainless steel heat exchanger, which offers exceptional durability and ensures long-term reliability.

The boiler range is also compact and easy to install, making it suitable for homes of various sizes.

It also achieves up to 98% efficiency, significantly reducing energy costs.

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Now that we&#;ve gone through all the most reliable boiler brands in the UK, making that final choice can still be overwhelming.

That&#;s why we&#;ve made it as simple as possible.

If you want to chat with someone about purchasing a reliable boiler, feel free to reach out to one of our consultants via the live chat window at the bottom right-hand corner of the screen.

Boilers are far less common than gas furnaces, and that&#;s reflected in the responses to Consumer Reports&#; most recent survey on central heating. Our members installed 1,384 new boilers between and compared with more than 25,000 gas furnaces.

But just like a furnace, when a boiler breaks you want it repaired&#;or replaced&#;ASAP. In our most recent survey, almost 40 percent of our members said they had their boiler inspected at least once a year, and over 20 percent said they had theirs maintained once every two years. 

Based on our last analysis in , we determined that on average, about two-fifths of boilers are likely to experience a break by the end of the 10th year of ownership, the midpoint in the expected life of a system.

For more information on boilers, including how to maintain yours for maximum efficiency, see our boiler buying guide. And for our full ratings, check our boiler reliability ratings, where we break down each brand we test.

Contact us to discuss your requirements of Vacuum Boiler. Our experienced sales team can help you identify the options that best suit your needs.