What’s the premium brand you thought it to be? And what boiler brands have been boiled up in a big stew and pushed through a pasta maker straight into a Sports Direct foyer?
This question is one almost every new boiler shopper is going to consider at some point.
Deep diving into the world of boiler quality so you don't have to - we've covered historic boiler reputation, build quality, customer reviews and made comparisons to pasta so you still leave us confused enough to hold an element of wonder about the world.
You may have never given much consideration to boiler brands but are likely to have heard of household names like Worcester Bosch, Viessmann, Vaillant and Baxi.
Much like you may have done with Nike, Puma & Adidas.
...but you’d be understandably apprehensive about the longevity of a Diadora boiler.
So how do you know which boiler brand to choose?
How did we choose the best boiler brands?
You want a boiler to be reliable, offer maximum value for money and have a long life - like milk during an apocalypse.
Ultimately, these are the areas where the best boiler brands perform perfectly.
A decent warranty period is also a winning combination as if something does go wrong, you want the guarantee that you will not be left in the lurch to deal with it yourself.
Lesser boiler brands will indeed leave you in said lurch.
When compiling our top 10 list of the best boilers, we considered several critical factors:
Warranty Period: A longer warranty indicates greater durability and reliability.
Brand Reputation: Assessed through customer reviews and feedback from industry experts, including our engineers.
UK Sales: High sales reflect consumer trust and satisfaction.
Awards and Accolades: Recognition from reputable industry bodies and publications.
Which? Survey Results: Insights from an annual survey of 10,000 homeowners and 200 expert engineers.
Aftercare: Evaluated the level of support and maintenance services provided by the manufacturer.
Price Range: Included options to suit different budgets while ensuring value for money.
Efficiency Ratings: Higher ratings mean lower running costs and reduced environmental impact.
Technology and Features: Advanced features enhance performance and ease of use.
Spare Parts Availability: Easy access to affordable parts ensures efficient maintenance and repairs.
Please note: Most UK households use combi boilers, so should you want a more in-depth analysis of these, make sure to check our best combi boiler guide for the full rundown. Also, check our boiler replacement guide if you are considering replacing yours soon.
Prefer video? Check our YouTube video of the best boiler brands of the year below:
What are the best boiler models?
The "Best" boiler can change depending on individual goals and other factors like budget constraints and property size. Here’s a summary of the best boilers we've reviewed, highlighting those that excel in key areas:
Best all-around boiler: Worcester Bosch Greenstar 4000
Most affordable: Alpha NX Combi Boiler
Best value for small homes: Worcester Bosch Greenstar 2000
Best value for large homes: Vaillant EcoTec Pro
Most powerful combi boiler: Viessmann Vitodens 100-W
What are the best boiler brands in the UK?
So, without further ado, here are the best boiler brands that made our top 10 list (in ascending order):
#1 Worcester Bosch
#2 Vaillant Boilers
#3 Alpha Boilers
#4 Viessmann Boilers
#5 Ideal Boilers
#6 Baxi Boilers
#7 Glow Worm Boilers
#8 Potterton Boilers
#9 Intergas Boilers
#10 Vokera Boilers
Our findings closely mirror those of the Consumer Organisation Which?, which recently released its annual boiler survey results. These results highlighted Worcester Bosch as the standout performer, with an impressive overall score of 82%, and they also received the Best Buy Award for the 14th consecutive year.
Additionally, in a distinct category of the survey, Vaillant emerged as the front-runner, earning a commendable 81% approval rating from 200 independent heating engineers for their gas boilers.
Join Thousands of Satisfied Customers:
We’re proud to be Which? Trusted Traders with over 10,000 glowing reviews on Trustpilot. Check out our Reviews and Testimonials page and watch Adrian’s video testimonial below to see why so many trust us for their heating needs.
#1 Worcester Bosch Boilers (Best Boiler Manufacturer)
Otherwise known as… the boiler brand you’ve heard of.
A renowned name in the UK home heating sector.
...and the preferred boiler of 9/10 Dads.
Worcester Bosch has a long history of being one of the best-selling and most trusted brands. Several of their combi boilers have been awarded a Which? Best Buy Award for 14 consecutive years.
Want a new Which? Best Buy boiler with professional installation?
Worcester obtained status as one of the best boiler brands not just through product quality, but aftercare.
Their commitment to Worcester boiler owners after installation, is quite literally second to none and the attention paid to you as a customer can border on creepy.
To showcase this, they outcasted the word warranty - suitability replacing it with the Worcester Guarantee.
Overall, Worcester Bosch is a great all-rounder, offering high-quality and award-winning boilers at competitive prices.
Combine that with their excellent guarantee offer, customer service, and easily sourced parts and you have one of the best boiler brands in the UK.
Read our Worcester Bosch vs Viessmann Boilers review if you need some help in choosing between these two big brands.
You can check the latest deals on Worcester Bosch boilers here, and see how the brand compared to another market leader in our Worcester Bosch vs Vaillant Boilers post.
Key facts on the Worcester Bosch boiler brand:
Guarantee period
Up-to 10 yearsWhich? Best Buys
Yes, boatloads - for 10 years runningPrice range (fitted)
£2,100 > £3,900
Representative Worcester boiler installation prices from Heatable.
The image above shows a Worcester Bosch 4000 installed by the Gas Safe engineers here at Heatable. Get your free quote from us here.
*Prices assuming a basic ‘like-for-like’ combi boiler installation.
Boiler Model | kW | Guide Price | |
28 | £2,295 | ||
Worcester CDi Compact 32kW | 32 | £2,770 | |
30 | £3,695 | ||
25,30 | £2,745 |
#2 Vaillant Boilers (2nd Best Boiler Brand)
Vaillant is another boiler brand with a big presence in the UK boiler scene and another one of the few brands awarded with a Which? Best Buy.
And joining Abraham Lincoln and Shakira's hips on a particularly prestigious list - Which? don’t lie.
Vaillant has earned its right to sit amongst the other award-winning brands by churning out premium quality boilers longer than anybody would care to Google.
Made in the UK, Vaillant offers a variety of boiler types and sizes, engineered to an extremely high standard and backed by a hefty 10-year warranty. Are you wondering exactly what a combi boiler is? Find out in our what is a combi boiler guide.
Want to save money and energy on your heating bills? If so, you should consider installing one of the best smart thermostats.
Do you have a Vaillant and are experiencing the F28 code? Read our full guide on the Vaillant F28 error. You can also read our review of the Vaillant EcoTEC Pro.
Key facts on the Vaillant boiler brand:
Warranty period
Up to 10 yearsWhich? Best Buys
YesPrice range (fitted)
£2,100 > £3,900
Downsides? The only thing to exceed Vaillant's product quality is their price.
#3 Alpha Boilers (3rd Best Boiler Manufacturer)
Would mutton ever dress as lamb?
It seems so.
Disguised as, or accused of being a ‘budget’ boiler brand, Alpha has been quietly slotting nifty little bargain boilers into UK homes for years and totally forgot to advertise that fact.
Alpha Boilers is a budget-option brand that has been increasing its market share in the UK-wide boiler market over the last few years. They are a fantastic option for the buyer who is looking for a reliable and affordable heating solution with a moderate warranty length.
Although considered a budget boiler brand, on a technical level, Alpha’s products are excellent, for example, they utilise a stainless-steel heat exchanger which is usually something you would only expect in a premium brand like Viessmann.
Alpha’s range of combi boilers is by far the most popular and they include the likes of the E-Tec, Intec or Evoke, and they are priced between £720 and £2,500.
Alpha offers a warranty of 7 years on their Alpha E Tec, but Heatable offers an exclusive 10-year warranty, which matches some of the premium brands.
The ever classy parents of Alpha, - the Italians - count Alpha as their countries #1 boiler brand and fourth favourite thing in the world behind, olive oil, smoking and Andrea Pirlo’s hair.
Alpha is a superb choice for those wanting the best central heating boiler (if on a budget).
Have issues with your combi boiler? Read our boiler problems and solutions for quick troubleshooting guidance.
Key facts on the Alpha boiler brand:
Warranty period
Up-to 10 yearsWhich? Best Buys
None, not for lack of tryingPrice range (fitted)
£1,850 > £2,395
Representative Alpha boiler installation prices from Heatable.
*Prices assuming a basic ‘like-for-like’ combi boiler installation.
Boiler | kW | Price Guide |
|
28 | £1,875 | ||
33 | £1,945 |
Looking to pay for your new boiler monthly? Refer to our boiler on finance guide for more info.
Have you got limited space in your home? Check out our guide on the best small boilers.
Did you know our boiler installation cost calculator only takes 60 seconds to complete? Using a series of multiple-choice questions can provide you with a fixed price on a range of budget-friendly boilers.
#4 Viessmann Boilers (4th Best Boiler Manufacturer)
Dominating the European boiler market, Viessmann has a 5-star reputation thanks to its superb German engineering and simple, crisp designs. No ridge cut here.
Now, breaking its way into the UK market, the Viessmann brand is building a solid reputation nationwide, for both reliability and quality whether you can pronounce their name, or not.
Check the latest deals on Viessmann boilers here.
We’re reliably informed it’s ‘Veezman’.
Awarded a Which? Best Buy Award on 7 of their models, Viessmann has been described as a “very smart choice” by the trusted consumer organisation. They do ramble on.
All Viessmann boilers are technically brilliant and this is a definitive advantage the brand has over rivals. For example, they use stainless steel heat exchangers as opposed to aluminium commonly used inside most other boiler brands.
A heat exchanger is pivotal and generates hot water. Some boiler brands choose to neglect this component and construct them from lesser materials at the price of longevity. Picture a well-built Roman gladiator, armed only with Scotch Eggs - it will be his downfall.
Stainless steel is more durable, better able to deal with sludge and withstand years of corrosion, two major culprits of boiler faults and failures.
If you prioritise quality above all else, then a Viessmann boiler may be the right choice for you and your home. Check out our Viessmann Vitodens 050 Review and Viessmann 100 Review for a more in-depth look into two of their most popular models.
Key facts on the Viessmann boiler brand:
Warranty period
Up-to 10 yearsWhich? Best Buys
Yes, three bags fullPrice range (fitted)
£1,895 > £2,645
Representative Viessmann boiler installation prices from Heatable.
*Prices assuming a basic ‘like-for-like’ combi boiler installation.
Boiler Model | kW | Price | Guide |
25 | £2,220 | ||
30 | £2,320 | ||
30 | £2,890 | ||
35 | £2,999 | ||
35 | £3,925 |
Check our new boiler costs guide and use our boiler size calculator if you want to get a better understanding of how our fixed-price boiler quote tool works.
#5 Ideal Boilers (5th Best Boiler Manufacturer)
As their name implies, the Ideal brand does indeed create some ideal boilers. Not incredible, not awful. Just… ideal.
Established in 1906 in Kingston upon Hull, Ideal Boilers have a long history in the UK home boiler market as a historic British brand with a reputation for excellence.
So far, so boring. But the Ideal brand has at least secured sponsorship of the equally boring, and arguably third best football team in the Midlands - West Brom.
Ideal offers a comprehensive range of boilers from budget-friendly models to a more robust variety with all the bells and whistles and fancy features you could want.
Note: Thinking about an immersion heater instead? Read our guide to find out how they compare to combi boilers.
If you live in an average-sized home, see our guide on choosing the best boiler for a 3 bedroom house.
Learn all about the combi boiler installation in our quick help guide.
Read our Ideal Vogue MAX combi boiler review.
Key facts on the Ideal boiler brand:
Warranty period
Up to 12 years (MAX accredited installers only)Which? Best Buys
NonePrice range (fitted)
£1,900 > £2,900
Is your boiler leaking or losing pressure? Use our quick and easy tool to get your fixed price boiler replacement.
#6 BAXI Boilers (6th Best)
With their manufacturing centre based in Preston, Lancashire, BAXI boilers is another British-made boiler brand with a solid offering of combi, regular and system boilers engineered to last the test of time.
Although not typically recognised as being a premier option in the heating industry overall, BAXI does have a nice selection of products, with healthy warranties and award-winning customer service. So, with all these factors in mind, if you are looking for a brand that offers maximum value for money, a BAXI may be the way to go.
It’s not necessarily all quality delivering on that time test, though. Rather quantity.
BAXI have produced more boilers in the last decade than Gillette have razors, and in doing so have inadvertently spoiled their own boiler broth.
Choosing one of their very good boilers requires a roulette-style gamble or extensive research.
On the plus side, BAXI’s North Pole of boilers has commanded an army of boiler elves on hand to deliver awesome aftercare.
If excellent customer service and availability of parts are important to you, BAXI offers both.
Do you have a back boiler and want it replaced with a modern combi boiler? Ideal looking like an ideal choice? Get a fixed online price.
Interested in a Baxi? Read our Baxi Duo Tec 28 review and the Baxi 600 Combi boiler.
See how the brand fared against Worcester Bosch in our Worcester Bosch vs Baxi comparison.
Key facts on the BAXI boiler brand:
Warranty period
Up to 10 yearsWhich? Best Buys
NonePrice range (fitted)
£1,860 > £2,600
#7 Glow-Worm Boilers (7th Best)
Glow-worm remains in its infancy as another ‘budget’ boiler brand but has the good fortune of being charitably fostered by boiler brand giants, Vaillant.
Manufactured in their Derbyshire factory, Glow Worm is another UK-made boiler brand offering a variety of boilers including combi, regular and system models. Glow Worm’s Energy range incorporates the latest technology to help increase efficiency, reduce fuel wastage and ultimately reduce your carbon footprint.
An ideal option for those looking for an energy-efficient boiler on a budget. All the while, easing up on your planet-burning appliances.
Key facts on the Glow-worm boiler brand:
Warranty period
Up-to 10 yearsWhich? Best Buys
NonePrice range (fitted)
£1,700 > £2,400
Want to have your boiler moved to a different location? Check out our "cost of moving boiler" guide.
#8 Potterton Boilers (8th Best)
You haven’t heard of Potterton, I haven’t heard of Potterton. This one’s going to be quick.
That dumbfounded and motionless stare of looking at somebody else’s TV remote? Just pop HDMI 2 on? Good one.
That feeling? That’s Potterton.
In the past, Potterton manufactured condensing boilers for the premium end of the market only, but in recent years have launched a range of budget boilers, which has meant their warranty has been reduced to a measly 2 years, which may not offer the peace of mind many buyers are looking for.
Learn all about combi boilers in our what is a combi boiler guide.
Their combi boiler range includes the Promax, Titanium, Promax Ultra, Assure and Gold, and are priced between £675 and £1,450.
Have an issue with your Potterton boiler? Read our in-depth guide on Potterton Boiler Problems.
Apart from their short warranty period (on most models), Potterton does offer some technically brilliant boilers.
Potterton's marketing team are just trying to reach you telepathically, that’s all.
Key facts on the Potterton boiler brand:
Warranty period
Up-to 10 yearsWhich? Best Buys
NonePrice range (fitted)
£1,950 > £2,700
#9 Intergas Boilers (9th Best)
Intergas is a relatively new boiler brand in the UK that boasts that its boilers offer the fewest moving parts of any rival.
A feat that Sean Dyche's Everton team also achieved in 2024.
But as any good bank robber will tell you..Nobody moves, and nobody gets hurt. It’s similar with boilers. 🥷
As far as boilers go, the latest Intergas boilers are extremely attractive, offering sleek, contemporary designs, super modern LED displays and remote-control systems for ultimate convenience and user-friendliness. Like Ryan Gosling with a Go-Pro on.
They offer two combi ranges, Rapid and Compact, which are priced between £690 and £1,440 and a warranty ranging from 3 years up to 7 years depending on the exact model you choose.
If you're on the hunt for a condensing boiler that looks sleek and has a quality build, then Intergas may be an option to consider.
Curious to know which boiler brand performed worst? Find out in our report of the worst boilers.
Want to know how condensing boilers differ from combi boilers? Read condensing boilers vs combi boilers.
Related reading:
Key facts on the Intergas boiler brand:
Warranty period
Up-to 10 yearsWhich? Best Buys
NonePrice range (fitted)
£1,900 > £3,600
#10 Vokera Boilers (10th Best)
Imagine all the boiler brands you haven’t heard of in this list? Now imagine the ones we haven’t listed.
Vokera’s 10th spot is still noteworthy.
Engineers love their simplicity and homeowners love their price.
In terms of warranties, Vokera boilers offer a warranty from 2 years up to 7 years depending on the exact boiler model you choose. Their models include the Evolve C, Unica i, Vision Plus, Vision C and Compact A. Staggeringly awful names for what are true decent boilers.
Overall, Vokera is a fantastic budget-friendly option, so if you are looking for a no-thrills boiler for your property, a Vokera might just be the perfect solution.
Got an emergency? If your boiler is busted and you have no hot water, you may be interested in our emergency boiler installation guide.
Key facts on the Vokera boiler brand:
Warranty period
Up-to 10 yearsWhich? Best Buys
NoPrice range (fitted)
£2,000 > £2,700
Other UK Boiler Brands:
Of course, there are plenty of other UK boiler brands to choose from, but some of them didn't quite make the mark for our top 10 list.
Nonetheless, we have reviewed and compared many of them, including the following:
How to get a new boiler 👻
You may need a new boiler.
You may need it fast and with affordable monthly payments.
You may even need it from a company with top-end local engineers, with 10,000 Trust Pilot reviews to back them up. Plus a Which? Trusted Trader award for good measure.
You may need a new boiler quote from us, Heatable 😘
FAQ’s
Which boiler brand offers the best warranty?
Often considered one of the top boiler brands in the UK, Worcester Bosch offers up to a 12-year warranty on some of its models when installed by a Worcester-accredited installer.
Which boiler brand has the best reviews?
Ideal Boilers has amassed thousands of reviews on the third-party review platform Trustpilot, achieving an impressive average rating of 4.8. On the other hand, Worcester Bosch has maintained a solid average score of 4.6.
It's important to highlight that Worcester Bosch has consistently been recognised as a Which? Best Buy award winner for over ten years.
This prestigious award results from an annual boiler survey where gas engineers evaluate various brands across multiple metrics, including ease of repair and customer service. This long-standing accolade underscores Worcester Bosch’s commitment to quality and customer satisfaction.
Which boiler is the most reliable?
Regularly rated as one of the most reliable and trusted boiler brands in the UK, Worcester Bosch often tops Which? surveys and has a strong reputation for long-lasting products and excellent customer service. Their boilers are known for their robustness and are backed by comprehensive warranties.
Which boiler brand is the most affordable?
Alpha Innovations boilers stand out as exceptionally cost-effective compared to leading brands. They strike an excellent balance by offering a generous 10-year warranty, which is rare among budget boiler brands, coupled with a high-quality stainless steel heat exchanger.
This combination of affordability, durability, and extended warranty coverage makes them a compelling choice for homeowners seeking value without compromising on quality.
Another option is Glow Worm who offer entry-level boilers with a 5-year warranty. Made in their Derbyshire facility, the brand is also owned and operated by industry giant Vaillant.
Get a Quote for One of the Best Boilers Today
If you’re aiming to get the best deal on a new boiler, consider getting a quote from us, here’s why:
Gas Safe installation within 24 hours.
Thousands of satisfied customers with an average score of 4.9 on Trustpilot, surpassing the market leader.
Which? Trusted Trader: Heatable is proudly recognised as a Which? Trusted Trader.
Price match guarantee: We will match any like-for-like cheaper quote.
Flexible payment options, including interest-free finance.
Up to 12-year guarantee on selected boilers.
Fixed price guarantee: No hidden costs.
Save your quote and decide later.
Get an instant fixed price on a new boiler, here.
To learn more about boilers, visit our advice section, check out our YouTube channel, or read customer testimonials here.
Heat Happy.
