The 6 Best Boiler Brands in the UK - 2024 Guide

Jan. 06, 2025

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The 6 Best Boiler Brands in the UK - Guide

When it comes to heating and hot water, every homeowner wants a reliable boiler that won't fail when they need it most.

But with so many boiler options out there, finding the perfect match can feel like searching for a needle in a haystack.

To help make the process of getting a new or replacement boiler a little easier, BOXT's experts are here to share our knowledge and insights to help you figure out which is best for you. Here, we go through some of the best boiler brands in the UK that are efficient, durable and offer great value for money.

What are the best boiler brands in the UK?

From industry giants with a long-standing reputation for excellence to innovative newcomers shaking things up, we're shining a spotlight on the most reputable and reliable boiler brands in the UK. Whether you're a first-time buyer or an experienced homeowner looking to upgrade your current system, consider this your go-to guide for finding the perfect boiler brand for you.

1. Worcester Bosch boilers

Worcester Bosch is considered a household name in the UK, recognised for their durable and reliable gas and oil boilers. The brand has built a solid and positive reputation in the industry, receiving numerous awards for its contributions to innovation, customer satisfaction, and energy efficiency.

Worcester Bosch boilers are available from BOXT in a range of different sizes and models, all rated 'A' (90%+) for efficiency. You can also add smart thermostats, allowing you to further optimise performance and enjoy greater control over your heating system.

Testament to their high quality and longevity is their competitive 7 and 10-year warranties, so you'll know they've got you covered and stand behind the durability of their boilers.

Popular Worcester Bosch models

Worcester Bosch Greenstar An affordable, quiet combi boiler designed to slot seamlessly into place and keep your heating and hot water running reliablyWorcester Bosch Greenstar CDiA compact combi boiler suitable for small, medium and large-sized properties with one or two bathroomsWorcester Bosch Greenstar A modern boiler perfect for small to medium-sized homes with one bathroom, featuring an easy-to-use full-colour text display with quiet operationWorcester Bosch Greenstar A sleek, design-led boiler with quiet operation without compromising on powerWorcester Bosch Greenstar RiA compact, wall-mounted boiler that is perfect for small and medium-sized homes

2. Vaillant boilers

Vaillant was first established way back in , and it's now one of the leading boiler brands in Europe. They use state-of-the-art technology across their range of combi boilers, system boilers, and standard boilers.

As a brand, it's also always looking for ways to improve its customers' lives and help the planet. Some of Vaillant's most popular products boast energy efficiency ratings of an incredible 98%, helping to make sure they're doing right by the environment and keeping the everyday homeowner's heating bills to a minimum.

While Vaillant boilers may be on the higher end of the price range, their well-deserved reputation for performance, sustainability and cutting-edge technology makes them a wise investment.

Popular Vaillant models

ecoTEC plusA first-class combi boiler available in higher outputs that are ideal for larger homes, offering heaps of power without the noiseecoTEC Exclusive Green iQA premium combi boiler with advanced energy-saving features and smart home compatibilityecoFIT PureA cupboard-size combi boiler that's perfect for any home

3. Navien boilers

Navien has carved out a distinct place in the heating industry, becoming one of the world's largest boiler manufacturers. In short, they know their stuff. They're at the forefront of new technologies, offering up to 98% energy efficiency ratings.
With warranties of between 5 and 10 years, you can be confident that careful craftsmanship and testing go into the manufacture of each oil or gas boiler.

If you're seeking a combination of efficiency, technology, and reliability, Navien stands as a top-tier choice. But don't just take our word for it. Invest confidently, knowing that every Navien boiler has undergone a rigorous testing process involving well over 250 separate quality checks by expert engineers.

Popular Navien models

NCB700 ONA cutting-edge combi boiler that can deliver hot water to three bathrooms simultaneouslyNCB500 ONA combi boiler suitable for family homes, offering superb hot water comfort, powerful heating and flexible installation optionsNCB300A compact combi boiler best suited to smaller homes, featuring smart weather forecasting and smartphone compatibility for remote control

Ready to upgrade your boiler? Head to our boiler page to tell us about your home and current boiler, then you can choose from a range of makes and models that we know will be perfect for your home. From there, one of our expert installers will be there as soon as the very next day to install your new boiler.

4. Baxi boilers

Innovative, sturdy, and reliable, Baxi has continuously crafted high-quality boilers since . Dedicated to using some of the best components available today and cutting-edge technologies like smart thermostat technology, you can be confident Baxi is a great choice for home heating and hot water.

They offer excellent value for money, competitive warranties of up to 10 years, and energy efficiency ratings that place them up there with the heavy hitters.

Popular Baxi models

Baxi 600A versatile combi boiler that produces hot water in an instant Baxi MegafloA great choice for homes that require large amounts of hot water or have more than one bathroom

5. Glow-worm boilers

Known for their commitment to innovation and reliability, Glow-worm boilers offer homeowners a dependable heating solution backed by years of industry expertise.

With a diverse range of models tailored to various heating needs, Glow-worm ensures there's a boiler to suit every home, whether it's a compact system for smaller spaces or a high-efficiency model for larger properties.

What sets Glow-worm apart is its commitment to user-friendly features, modern designs, and cutting-edge technology, making operation a breeze.

Popular Glow-worm models

Glow-worm Energy Combi BoilerA compact combi boiler ideal for small-medium sized homes with limited space

6. Ideal boilers

Ideal has been one of the UK's leading boiler manufacturers since , thanks to their high-efficiency standards, robust after-sales support, and use of modern technologies.

All the Ideal boilers BOXT stocks have an ErP 'A' rating for heating and hot water, meaning your new boiler will be over 90% energy efficient. Look forward to reduced energy bills and a reduced carbon footprint with Ideal.

The brand also offers a competitive price range, meaning you don't have to choose between a lower upfront cost and high energy efficiency. It's the best of both worlds.

What's more, with a 7-year warranty, you can relax knowing your new boiler will be covered for years to come.

Read our warranty guide to find out how long you could be covered for and what the manufacturer's terms are. If you have your boiler installed by us, we'll register your warranty for you, so you don't need to do a thing - you'll be covered immediately.

Popular Ideal models

Logic+A compact combi boiler with an A energy rating and built-in frost protectionVogue MaxA stylish, premium combi boiler with advanced technological features and an energy rating of A

How to choose the right boiler brand and model for your home

Once you know which brand you want, there are other considerations to help choose the right model. We've broken them down for you so you can be more confident in making the right choice for you and your home.

Consider your home's heating needs and preferences

We recommend assessing the size of your home and its heating demands. Larger homes or those with multiple bathrooms may need a more powerful boiler.

The best boilers for large houses tend to be standard or system boilers, as they're able to provide enough hot water for all of your bathrooms simultaneously as well as having enough power to heat your radiators, and underfloor heating systems.

Best Boilers & Brands in the UK in : Top 5

Best Boilers & brands in the UK in : Top 5

By: Ciaran Wark

Worcester Bosch, Baxi, Ideal, Alpha, and Viessmann make the most reliable boilers in the UK.
Viessmann Vitodens 100-W, Alpha E-Tec, Ideal Logic, Worcester Bosch Greenstar , Baxi 800 Combi are the best boilers in the UK.
The top 5 boilers are highly efficient, provide up to 12 years of warranties and cost between £732 and £1,292.

When it comes to looking for boilers, every homeowner wants to choose only from the best boilers available. Yet comparing boiler brands is not always easy if you're not sure what to look out for. Finding the most reliable boiler manufacturer will give you peace of mind that your new boiler will perform optimally and that you're in safe hands if it ever runs into issues.

With so many boiler options to consider, deciding which boiler is the best to buy for your home can become challenging. To make the most informed decision, it's highly recommended to get help from an experienced heating engineer.

Yet searching for reputable installers can take hours of your valuable free time, which you don't always have! Thankfully, BoilerGuide's quote service offers a hassle-free way to find boiler experts in your area.

By completing our 30-second form, you'll get up to 3 quotes from local engineers. Our service is free with no obligation. Click the link below to begin.

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Brilliant service. Was getting a headache from other plumbers with extortionate prices. Saves a lot of hassle ringing around. Really pleased. Thank you.

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This was the hassle free way of finding a boiler company in my local area for a quote. I recieved 3 quotes and I was very satisfied. The job is complete and I'm now saving on my usage. I would highly recommend using Boiler Guide.

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Boiler Guide is the go-to to find the best boiler at a reasonable price and good installer. The experience has shown me to do your research properly when you are thinking of spending a lot of money. Boiler Guide was in touch to check if I found an installer. Thank you Boiler Guide

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Boiler guide is an excellent, quick & easy way to source businesses to provide quotes to have boiler replaced.

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The guys that came round were very professional and polite told us everything we needed to know and left the area spotless thanks

S Harding

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G@Southampton

How we chose the best boilers & best boiler brands

Navigating the extensive landscape of boiler manufacturers in the UK becomes more manageable with specific criteria to identify the most reliable companies. Our selection process for top-tier boiler brands incorporates a set of practical considerations:

Established history and experience: Delve into the company's background and reputation within the boiler industry. A track record of innovation and consistent quality signals reliability in their boiler production.
Efficiency: Prioritise brands that design boilers focusing on energy efficiency, cost-effectiveness, and sustainability.
Customer reviews: Track customer satisfaction through positive feedback. A well-designed and reliable product with favourable reviews underscores the company's commitment to quality and customer needs.
Competitive price range: Accessibility is crucial, and a competitive price range ensures that a broader audience can afford the central heating installation cost and benefit from the company's features.
Warranty period: Evaluate the warranty duration provided. A longer warranty period not only offers peace of mind for homeowners but also reduces the risk of unforeseen repair costs, adding to the overall value of the product.
Customer service excellence: A high standard of customer service, marked by responsiveness and helpfulness, significantly contributes to a positive overall experience for homeowners.
Diverse model range: A broader selection of models enhances versatility, allowing manufacturers to cater to the varied needs of homeowners. The more diverse the model range, the better the company can address different boiler requirements.

By considering these factors, we have created our list of companies that provide the best boilers in the UK. With our list in mind, you can make an informed decision based on your preferences and needs, steering clear of boiler brands that may not align with your expectations.

What are the best and most reliable boiler brands in the UK?

The best boiler brands in the UK are: Viessmann, Alpha, Ideal, Worcester Bosch, and Baxi. Here's how each brand stands out:

Viessmann: Renowned for their innovative technology, achieving up to 98% energy efficiency and compatibility with various fuel sources, including renewable options like solar thermal and biomass.
Alpha: Celebrated for their innovative technology, such as modulating burners and digital controls, and exceptional aftercare services, including generous warranties and a nationwide service network
Ideal: Known for their user-friendly controls, high reliability due to a low component count, and energy efficiency, making them a cost-effective choice for homeowners.
Worcester Bosch: Highly rated for their reliability, energy efficiency, and innovative features, consistently earning Which? Best Buy awards and maintaining a high level of customer satisfaction.
Baxi: Stand out for their robust construction, high energy efficiency, and smart controls, with features like the stainless steel heat exchanger and Adey Micro2 magnetic system filter enhancing durability and performance.

Let's take a closer look at these models to see whether they can become the best boiler for you and your household.

#1 Viessmann Vitodens 100-W

Output range: 19-25kW
Efficiency: 94%
Warranty: Up to 12 years
Price range: £1,125-£1,292

If you ever googled 'What are the best gas boilers', you have surely come across Vitodens 100-W Combi Gas boiler. It's known for its exceptional efficiency (up to 94%), quiet operation, and long lifespan. So, opt for Vitodens 100-W if you're searching for the best gas boiler for your heating project.

Moreover, this model is compact, lightweight, and efficient due to its modulating MatriX-Plus cylinder burner and Inox-Radial heat exchanger. Also, it is a powerful model, making it one of the best combi boilers for a large house.

While it's by far the most expensive boiler on our list, governmental initiatives like ECO4 can reduce the cost of a new boiler for you.

#2 Alpha E-Tec

Output range: 26.1-29.7kW
Efficiency: 93%
Warranty: 7 years
Price range: £745-£815

While this is the cheapest combi boiler option on our list, it is known for its reliability and ease of use. It is a good option for those looking for a basic and the most reliable combi boiler in the lower price range.

Apart from being the best combi boiler under £1,000, Alpha E-Tec features a stainless steel heat exchanger, contributing to its longevity and corrosion resistance. This model can provide central heating for medium-sized and larger homes thanks to its additional power output options and impressive hot water flow rates.

#3 Ideal Logic range

Output range: 15-30.3kW
Efficiency: 93%-94%
Warranty: 7-10 years
Price range: £732-£1,117

Ideal's Logic regular boiler model range offers a good balance of price and performance. It is reasonably efficient and reliable, and it comes with a 5-year warranty. Ideal Logic is considered to be the most commonly installed boiler in the UK, noted for its simplicity and popularity with new build developers.

Some of the Ideal Logic features include built-in frost protection, smart temperature controls, and a simple design which secures Ideal boilers a spot among the best home boilers. Moreover, it's made in the UK, so the prices can be potentially lower.

#4 Worcester Bosch Greenstar

Output range: 12-24kW
Efficiency: 93%-94%
Warranty: Up to 12 years
Price range: £975-£1,200

Worcester Bosch Greenstar system gas boiler is considered to be the best all-around combi boiler by Which? platform. It is highly efficient, quiet, and reliable, and it comes with a 10-year warranty. It's known for its high efficiency and eco-friendliness. Its 'Quick Tap' feature minimises water usage and it's also compatible with the Bosch Easy Control smart thermostat for temperature control in separate rooms.

These boilers have a wide power range to meet heating and hot water requirements efficiently. To say more, they are designed to operate well in low water pressure areas, ensuring powerful and warm showers.

#5 Baxi 800 Combi

Output range: 21.2-26.4kW
Efficiency: 93%
Warranty: 10 years
Price range: £858-£1,205

The Baxi 800 Combi boiler offers a range of outputs to suit different property sizes. Also, their boilers boast high efficiency and a generous warranty period. This makes it a reliable choice for heating systems and one of the most popular and best combi boiler options in the UK.

Its advanced features, like the Adey Micro2 Filter, help provide reliable heating and hot water solutions for homes. This filter helps in capturing and removing any debris or sludge circulating in the system, preventing potential blockages, and maintaining the boiler's efficiency.

The best way to determine the best boilers to buy for your home is by seeking advice from a professional heating engineer. However, finding a trustworthy professional can prove challenging with so many options out there.

We can help you avoid hours of tedious searches by connecting you to our network of licensed, vetted engineers. To ensure you are not overcharged, we will only connect you to local installers who can ensure the best rates relative to your area.

What's more, we will put you in contact with up to 3 engineers, allowing you to compare their prices and find the best deal.

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Brilliant service. Was getting a headache from other plumbers with extortionate prices. Saves a lot of hassle ringing around. Really pleased. Thank you.

Berni Byrne

Mr Neil Cutsforth

Shirley Feshitan

FuShiDe Boiler supply professional and honest service.

Ted Billingham

K Patel

Steve W

Boiler guide is an excellent, quick & easy way to source businesses to provide quotes to have boiler replaced.

Sandra Emmerson

Margaret Arbuckle

Julie Walker

The guys that came round were very professional and polite told us everything we needed to know and left the area spotless thanks

S Harding

Joanne Barlow

Lindsay Nicoll

Windsor Browning

Sarah Bicknell

G@Southampton

What are the best boiler brands in the UK?

1. Worcester Bosch

In , Worcester Bosch's Customer Team was awarded the Customer Award at the HVR Awards.
Developed a 100% hydrogen prototype boiler that won the 'Best Heating Innovation' award at the Green Home Awards.
Celebrated two wins at the Housebuilder Product Awards for their Greenstar Life 45kW Combi and the Bosch Art Project.

Worcester Bosch is one of the most popular and recognisable brands in the home heating market. For over 50 years, this British brand has become synonymous with high-quality boilers and renewable heating solutions, achieving a Which? Best Buy for 10 years in a row.

Bosch's boilers are available as gas, LPG or oil-fuelled and they offer combi, system, and regular boilers. Bosch boilers will suit any sized home and they offer warranty options up to 12 years.

2. Ideal

Ideal has won the Queen's Award for Enterprise, recognising its 'outstanding innovation.'
Ideal boilers are designed for easy servicing and maintenance, with readily available parts ensuring convenient upkeep and repairs.
Ideal boilers feature a modulation range of 7:1, which contributes to energy savings and optimised performance.

Ideal has been manufacturing gas-fuelled boilers in the UK since . Ideal manufacture combi, regular or system boilers with outputs available for any sized home. Additionally, they offer some of the longest warranty periods on the market, with options up to 12 years.

3. Baxi

Started in in Italy, with a focus on heating the home.
Baxi is known for its compact, energy-efficient boilers like the Baxi 800 Combi, which comes with a 10-year warranty.
The company's Sustainability Pledge aims to ensure all products will work with low-carbon energy by , aligning to achieve a net-zero economy.

Baxi was established in in the UK. Baxi is a well-known gas-fuelled heating brand for its affordable price points in domestic and commercial markets. It offers a wide range of boiler sizes with combi, system or regular options and warranties of up to 10 years.

4. Viessmann

Viessmann has been recognised for its environmental initiatives such as ESyCool green cool energy solution, which won the IKU Award.
Viessmann is famous for its innovative heating technologies that enhance energy efficiency and performance in homes.
Its boilers are equipped with stainless steel heat exchangers, which contributes to the longevity and reliability of Viessmann boilers.

Viessmann began in Germany in . They soon became a pioneer in modern heating after Johann Viessmann developed the first steel boiler that was able to deliver fast heat with less fuel.

Nowadays, they have continued their international reputation as innovators in the industry, achieving a Which? Best Buy in for multiple boiler models. Viessmann's range includes gas and oil-fuelled combi, system or regular boiler models, with various size options.

5. Alpha

Won the CES Innovation Award for outstanding design and engineering in consumer technology products.
The company is committed to providing a 5-star service, with a 'Good Homes Approved' range of boilers.
Offers generous boiler warranties of up to 13 years.

Alpha Heating Innovation, or just Alpha, has over 50 years of experience in the UK heating industry. Alpha has been recognised for its quality assurance processes and specialist testing of new products. Generally, the Alpha boiler range includes combi, system and regular options.

Find the best boiler suppliers in the UK

So, what is the best boiler to buy? Now it's up to you to decide. Yet you should never sacrifice quality over price.

Remember that a reliable and efficient boiler becomes more than just an appliance. It's the heart of your home's comfort. However, with so many of the best boiler brands on the market, choosing the right one can feel overwhelming.

Here at BoilerGuide, we want to empower you to make an informed decision. There's no single 'best' brand for everyone. Yet leading options like Worcester Bosch, Alpha, Viessmann, Ideal, and Baxi consistently deliver on reliability, efficiency, innovation, and affordability.

Here is how you can find the best boiler for your home:

Research brand's reputation: Look for brands with a solid track record of quality, reliability, and customer satisfaction. Research online reviews and consult industry experts for insights.
Decide on your needs: Next, consider the size of your home, the number of bathrooms, and typical hot water usage. This helps determine the appropriate boiler size and type (combi, system, or conventional).
Decide on features that matter: Evaluate features like smart home compatibility, warranty options, and innovative technologies like self-modulation (adjusting power output for better efficiency) to suit your preferences.
Compare: Get quotes from several boiler installers to compare prices and services and decide which best boilers from our list suit your heating requirements.
Seek professional installation: Trust the boiler installation to a qualified and experienced technician. This guarantees proper operation and safety.

A professional Gas Safe registered heating engineer can walk you through the best boilers to buy or boiler brands to avoid in your particular situation.

BoilerGuide can help you narrow down your search quickly and easily. Answer a few simple questions about your home and we'll connect you with 3 reputable boiler installers in your area. This free, non-binding service takes only 30 seconds and saves you hours of research. Click below to start.

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4.6

out of

23,524

reviews

1,8 million quotes provided in 10 years

See more reviews:

Brilliant service. Was getting a headache from other plumbers with extortionate prices. Saves a lot of hassle ringing around. Really pleased. Thank you.

Berni Byrne

Mr Neil Cutsforth

Shirley Feshitan

Ted Billingham

K Patel

Steve W

Boiler guide is an excellent, quick & easy way to source businesses to provide quotes to have boiler replaced.

Sandra Emmerson

Margaret Arbuckle

Julie Walker

The guys that came round were very professional and polite told us everything we needed to know and left the area spotless thanks

S Harding

Joanne Barlow

Lindsay Nicoll

Windsor Browning

Sarah Bicknell

G@Southampton

FAQ

Which boiler brand offers the best warranty?

Worcester Bosch offers standard boiler cover up to 12 years, which includes parts and labour for boiler services and replacements. Worcester Bosch also offers various options to extend your warranty period.

Which boiler brand is the most affordable?

Among the most reputable boiler brands, Baxi offers the most competitive prices. Generally, the Baxi 800 Combi Gas Boiler will cost anywhere between £858 and £1,205, before installation. This includes a 10-year standard warranty.

Which boiler brand has the best reviews?

Ideal achieves the highest rating on Trustpilot from the top 5 UK boiler brands, 4.8 out of 5, with 21,788 reviews. Testimonials credit Ideal for exceptional customer service with efficient call-out and service times.

Which is the best boiler on the market?

While there's no single 'best' boiler for everyone, the top options from Worcester Bosch, Alpha, Viessmann, Ideal, and Baxi consistently deliver on reliability, efficiency, innovation, and affordability. Consult a local heating engineer to find the best boiler for your home.

Which boiler is the most reliable?

Based on expert opinion, the most reliable boiler in the UK is the Viessmann Vitodens 100-W. Viessmann is known for its highly efficient and reliable condensing boilers, offering a 10-year warranty, high efficiency, and eco-friendly features.

About the author

Ciaran Wark

Ciaran is an experienced content writer, editor, and researcher at Boiler Guide. Ciaran has become and expert in energy saving and eco-conscious living which he uses to help inform Boiler Guide's readers.

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