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How to Find the Best Boiler Brands in the UK in 2024

Ciaran Wark
By: Ciaran Wark
Updated: 1st February 2024

Best boiler brands
When it comes to looking for a new boiler, how can you be sure of the best boiler brand to go for? Comparing boiler brands is not always easy if you're not sure what to look out for. Finding a trustworthy 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.

The most reputable manufacturers have a range of boilers of different types and outputs to choose from. They will offer fair and extensive standard warranty periods and provide options for extra warranty cover should you want it.

Since these companies lead the way towards the future of home heating, you should also consider their environmental efforts and any future-proof technology they use. This might include internal components that reduce emissions or the possibility of running on hybrid biofuels.

All of these factors have been considered as we scoured the boiler market to find the best boiler brands out there in 2024.

Top 10 best boiler brands

We've listed the top 5 boiler brands according to the results of Boiler Guide's Home Heating Survey, conducted in November 2021. Numbers 6-10 on this list can be considered honourable mentions.

Most Popular Boiler Brands Survey

Our top picks for the best gas, electric and oil boiler brands all meet some of the following criteria:

  • Wide range of output options
  • Affordable price points
  • Exceptional efficiency ratings
  • Flexible warranty options
  • Custom features with premium quality
  • Overall reputation

After carefully choosing which boiler brand and model you would like for your home, next comes the new boiler installation. Finding the right installer requires some careful consideration. They must have a Gas Safe, or OFTEC license to ensure a safe installation and in many cases, to validate your manufacturer's warranty period.

Boiler Guide can take the pressure off of researching individual installers. After filling in our quick and easy form, our team will connect you to up to 3 Gas Safe or OFTEC registered installers from our network. After you've had free consultations with the engineers, you can compare their quotes to ensure you are getting the best service without being overcharged. Click the link below to get started.

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1. Worcester BoschWorcester Bosch boilers

Trustpilot: 4.6 out of 5 | 32,588 reviews

Worcester Bosch is one of the most popular and recognisable brands in the home heating market. For over 50 years, the 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.

Vaillant boilers

2. Vaillant

Trustpilot: 4.6 out of 5 | 17,335 reviews

With over 140 years experience, Vaillant has become a leading European manufacturer of gas-fired combi, system and regular boilers, as well as renewable heating solutions. In 2018, Vaillant achieved a Which? Best Buy for Gas Boilers.

With origins in Germany, the international heating giant remains family owned and dedicated to producing highly efficient and innovative heating technology. Vaillant's boilers are available in a wide range of outputs and come with warranty options up to 10 years.

ideal heating

3. Ideal

Trustpilot: 4.8 out of 5 | 21,788 reviews

Ideal has been manufacturing gas-fuelled boilers in the UK since 1906. Ideal manufacture combi, regular or system boilers with outputs available for any sized home. They also offer some of the longest warranty periods on the market, with options up to 12 years.

4. BaxiBaxi

Trustpilot: 4.5 out of 5 | 46,103 reviews

Baxi was established in 1866 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 up to 10 years.

5. ViessmannViessmann boilers

Trustpilot: 4.4 out of 5 | 3,632 reviews

Viessmann began in Germany in 1917. 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 2021 for multiple boiler models. Viessmann's range includes gas and oil-fuelled combi, system or regular boiler models, with various size options.

6. Alpha

Trustpilot: 4.7 out of 5 | 2,475 reviews

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

7. VokèraVokera

Trustpilot: 4.4 out of 5 | 1,433 reviews

Vokèra by Riello has 35 years experience manufacturing domestic and commercial heating and hot water solutions in the UK. Vokèra produces gas-fired combi, system and regular boilers in a range of sizes and prices.

Glow-worm

8. Glow-worm

Trustpilot: 4.6 out of 5 | 5,865 reviews

Glow-worm was established in the UK in 1934 in Derbyshire. Since 2001, Glow-worm has operated as part of Vaillant. From their production facility in Derbyshire, the company manufactures combi, system and regular boilers. Glow-worm continuously innovates its boiler products to ensure space-saving installation and maximum efficiency.

9. GrantGrant UK

Trustpilot: 4.4 out of 5 | 2,051 reviews

Homes off the gas grid can look to Grant for a new oil-fired boiler. Grant has been manufacturing in the UK and Ireland for over 30 years. The company has diversified from specialising only in oil-fuelled boilers, to now also producing air source heat pumps, solar thermal, and hybrid solutions.

10. BiasiBiasi

Trustpilot: 4.1 out of 5 | 400 reviews

Biasi is an Italian-based company with over 75 years of experience and was established in the UK in 1990. It has since become a leading manufacturer of gas-fired combi or system boilers in a wide range of outputs. They are especially known for offering some of the most affordable boilers on the market.

Best gas boiler brands

Natural gas remains the most popular fuel type for homes in the UK. Therefore, there are plenty of gas boiler options to choose from. From our list of the top boiler manufacturers, we've selected the best gas boiler brands for each boiler type (combi, regular and system) and provided them below.

Top 3 best combi boiler brands

Combi boilers are the most popular boiler type in the UK since they are efficient, compact and easily installed. These boilers operate from one unit since they take their water supply directly from the mains. They are best suited to smaller homes with 1 bathroom since they can usually provide a limited hot water supply. Visit our best combi boilers for a small house guide to make sure you choose the right one.

Vaillant combi boilers

Output range: 24kW-43kW

Max. efficiency: 94%

Warranty: 2-5 years as standard

Price range: £907 – £1,703

Vaillant's combi boilers are highly efficient and extremely quiet, demonstrated by their QuietMark accreditation. Vaillant offers advanced system control with the vSMART app as well as the possibility to run on a 20% hydrogen blend. For the largest homes, Vaillant has produced the ecoTEC plus combi store which features an integrated hot water tank that achieves hot water flow rates of up to 20 litres per minute. This is a very high flow rate because the best flow rates for a combi boiler go up to 21,1 liters per minute (l/min).

Best-selling combi boiler model  Output range Efficiency Warranty Typical price
ecoTEC plus combi 25, 32, 35 or 38kW ErP A, 94% 5 years standard, 7-10 years optional £1,152 – £1,431

Baxi combi boilers

Output range: 21kW-34.4kW

Max efficiency: 93%

Warranty: 2-10 years as standard

Typical price range: £549 – £1,482

Baxi's combi boiler range includes some of the most competitive prices on the market, starting from around £550. Baxi's combi boiler range includes various energy-saving features including weather compensation which automatically adjusts the heat output based on outdoor temperatures.

Baxi also offers hydrogen-ready models, custom smart controls, and EasyFill feature which saves you calling an engineer to top up the system pressure.

Best-selling combi boiler models Output range Efficiency Warranty Typical price
Baxi 800 Combi 21.2, 26.4kW ErP A, 93% 10 years standard £858 – £1,307
Baxi Platinum+ 40kW Combi 34.4kW ErP A, 93% 10 years standard £1,307

Ideal combi boilers

Output range: 18kW-24.2kW

Max efficiency: 94%

Warranty: 7-12 years standard

Typical price range: £750 – £1,334

Ideal offers many custom additions to their combi boiler range. These include the magnetic Ideal System Filter, stainless steel heat exchanger and weather compensation. An Ideal combi boiler also ensures easy use with smart controls, multi-function buttons and the easily reached system pressure gauge. All of their combi models are also hydrogen ready.

Best-selling combi boiler model Output range Efficiency Warranty Typical price
Vogue Max Combi Boiler 18, 26, 32kW A ErP, 93% 12 years standard £1,089 – £1,323

Best gas boiler brands

Top 3 best regular boiler brands

Regular boilers are the most traditional boiler type in the UK and will usually be found in older homes and buildings. While having a constant hot water supply is handy for large homes with high energy demands, regular boilers do take up some space in the home since they require an additional hot water cylinder and cold water tank. They will also provide lower water flow rates than system and combi boilers.

For these reasons, we recommend a new regular boiler only if you’re replacing it with an existing regular boiler since you will save on installation costs. That being said, below we've listed the best regular boiler brands for you to consider.

Worcester Bosch regular boilers

Output range: 12kW-59kW

Max efficiency: 94%

Warranty: 10-12 years as standard

Typical price range: £814 – £2,300

Bosch's regular boiler range features modern, compact designs with some options that will fit inside a standard kitchen cupboard. For larger homes, Bosch's Greenstar 8000 Life Regular reaches a central heating output of 50kW. Almost all of its regular models will combine with solar panels and solar-powered hot water storage from Greenskies.

Best-selling regular boiler model  Output range Efficiency Warranty Typical price
Greenstar 8000 Life Regular 30, 35, 40, 45, 50kW ErP A, 94% 5 years standard, 10-12 years optional £1,255 – £2,300

Viessmann regular boilers

Output range: 11kW-32kW

Max efficiency: 93%

Warranty: 5 years

Typical price range: £845 – £1,200

Viessmann's Vitodens 100-W Heat Only boiler is wall mounted and compact. This means it can be installed in the kitchen and it won't disturb you while it runs thanks to its low operating noise levels.

This model features the quiet Inox-Radial heat exchanger which helps reach 93% efficiency. It also includes other patented Viessmann technology such as weather compensation which allows fuel savings of up to 35%, according to Viessmann.

Best-selling  regular boiler model  Output range Efficiency Warranty Typical price
Vitodens 100-W Heat Only 11, 16, 19, 25 and 32kW ErP A, 93% 5 years standard £845 – £1,200

Vaillant regular boilers

Output range: 12kW-35kW

Max efficiency: 94%

Warranty: 2-5 years as standard

Typical price range: £792 – £1,533

Vaillant's regular boiler range features only 2 models. This range is compact enough to fit inside a standard kitchen cupboard, despite reaching a powerful central heating output of 35kW. Vaillant's advanced control options include the vSMART app and thermostat, and an integrated boiler timer.

Best-selling  regular boiler model  Output range Efficiency Warranty Typical price
ecoTEC plus regular 12, 15, 18, 24, 30, 35kW ErP A, 94% 5 years standard, 7-10 years optional £805 – £1,453

Top 3 best system boiler brands

System boilers are also suited to larger homes but will take up less space than a regular boiler since they don't require a cold water tank. Instead, they take water directly from the mains and keep it in a hot water cylinder.

A system boiler will suit medium-to-large homes. If you're looking for a system boiler, then you should consider the boiler brands we've listed below.

Bosch system boilers

Output range: 9kW-35kW

Max efficiency: 94%

Warranty: 7-12 years as standard

Typical price range: £899 – £1,446

Bosch's system boilers feature a modern, sleek design in black or white as well as low noise levels and compact dimensions allowing flexibility when installing. Most of their boilers will connect with Bosch's EasyControl thermostat and can be combined with Greenskies solar technology.

Best-selling system boiler model  Output range Efficiency Warranty Typical price
Greenstar 8000 Style System 30, 35kW A ErP, 94% 5 years standard, up to 12 years optional £1,317 – £1,446
Greenstar 8000 Life System 30kW A ErP, 94% 5 years standard, up to 12 years optional £1,236 – £1,357

Viessmann system boilers

Output range: 11kW-32kW

Max efficiency: 98%

Warranty: 3-5 years as standard

Typical price range: £995 – £1,650

Viessmann's Vitodens system boiler range reaches exceptional efficiency up to 98% thanks to the patented InoxRadial heat exchanger for heat recovery and Lambada Pro for automatic combustion control. The MatriX-Plus burner also reduces CO2 and toxic gas emissions during combustion. Both Vitodens system boiler models are also hydrogen ready.

Best-selling system boiler model  Output range Efficiency Warranty Typical price
Vitodens 200-W 11, 19, 25, 32kW A ErP, 98% 3 years standard, up to 10 years optional £1,344 – £1,650

Vaillant system boilers

Output range: 12kW-64kW

Max efficiency: 94%

Warranty: 2-5 years as standard

Typical price range: £894 – £2,700

Most Vaillant system boilers are QuietMark accredited for low operating noise levels and are seen as some of the best boilers for large houses with a maximum heating output of 64kW. These models allow for optimal heating control and system efficiency through the vSMART technology and precision heating. These features improve system efficiency which helps keep running costs down.

Best-selling system boiler model  Output range Efficiency Warranty Typical price
Vaillant ecoTEC plus System 12, 15, 18, 24, 30, 37, 48, 64kW 92%-94% 5 years standard £902 – £1,537

The best way to determine which boiler will best suit your home is by seeking advice on your home’s unique specifications from a professional heating engineer. Knowing who to trust can prove challenging with so many options out there.

Boiler Guide can simplify this for you 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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Best boiler brands UK

Top 3 best electric boiler brands

For homes that don't run on natural gas, like the 4 million UK homes off of the gas grid, there are some alternative fuel sources to consider. Electric heating has grown in popularity to become a popular alternative to natural gas.

Electric boiler systems are generally easier to install than fossil-fuelled boilers but come at higher running costs. However, switching to a green energy provider will result in less running costs down as these energy sources are renewable and less vulnerable to global market spikes.

Below we've detailed some of the best electric boiler companies in the UK.

The Electric Heating Company

Output range: 4kW-48kW

Max efficiency: 100%

Warranty: 2 years, 10 years on hot water cylinder

Typical price range: £1,480 – £2,700

The Electric Heating Company (EHC)  has been operating in the UK for nearly 15 years. Besides electric boilers, they also market electric radiators and water heaters.

Of all the electric boilers EHC produces, the Comet Combi Boiler is the most popular for its compact design which features all the necessary components in one unit, including an integrated 144 litre hot water storage with 10 years warranty. This model is also compatible with underfloor heating systems.

This range includes options for larger properties with a three-phase electricity supply that go up to 39kW and 48kW. It also features a stainless steel heat exchanger and, thanks to its electric fuel supply, boasts 100% fuel efficiency.

Heatrae Sadia

Output range: 4kW-12kW

Max efficiency: 100%

Warranty: 2 years, 10 years for hot water cylinder

Typical price range: £500 – £2,000

First established in 1920, Heatrea Sadia is another leader in electric boiler products. Now owned by Baxi, Heatrea Sadia is well-known for its innovation across its line of products.

Heatrae's product line includes the award-winning, highly popular Megaflo Eco hot water cylinder. This can provide mains pressure water supply for multiple outlets while maintaining a compact design.

Heatrea Sadia's electric boiler range includes the Amptec which combines central and underfloor heating, as well as the popular Electromax with its integrated hot water cylinder with 180 litre hot water capacity.

Elnur

Output range: 3kW-15kW

Max efficiency: 100%

Warranty: 2 years, 5 years on hot water cylinder

Typical price range: £1,200 – £2,370

Since 1973 Elnur has established itself as a world player in domestic and commercial electric heating. The Elnur electric boiler range includes a combi and system models.

The popular Mattira MAC15 Combi Boiler has available outputs from 3kW-15kW and is available for single or three-phase electricity supply. This space-saving combi boiler includes an integrated 50 litre hot water cylinder with flow rates up to 12 litres per minute.

Top 3 best oil boiler brands

Oil-fuelled heating is the most popular alternative to natural gas for UK homes off the gas grid. They have decreased in popularity over the years since crude oil prices keep rising as it’s an emissions-heavy and finite fuel source.

Upfront costs are also considerably more expensive than their counterparts. You will also require an oil storage tank which takes up space outside your property.

With this in mind, below we’ve listed some of the best oil fired boiler brands.

Worcester Bosch

Output range: 18kW-70kW

Max efficiency: 91%

Warranty: 2 years as standard

Typical price range: £1,430 – £2,77

Bosch produces powerful combi, system and regular oil-fuelled boilers. They offer both indoor and outdoor options in a range of outputs including a Greenstar Utility Regular Oil Boiler that goes up to 70kW.

The Greenstar Heatslave combi boiler is highly popular for homes of all sizes off of the gas grid. Its features include precise heating, hot water control and an eco hot water mode to save energy. It is also compatible with solar power for water heating.

Firebird Envirogreen

Output range: 12kW-100kW

Max efficiency: 93%

Warranty: 5 years as standard

Typical price range: £1,560 – £2,600

Firebird's line of combi, system and regular boilers oil boilers will suit any sized homes with available outputs that go up to 100kW.

These oil boilers are compatible with sustainable biofuel, HVO and come with outdoor installation options. It designs compact boilers that will fit under a kitchen unit with removable sides for easy access to the internal components. Some models are also fully insulated to avoid heat loss and limit toxic emissions such as through the NOx Elco burner and flue gas recirculation technology.

Grant

Output range: 16kW-70kW

Max efficiency: 94.5%

Warranty: 2 years as standard

Typical price range: £1,200 – £3,100.

Grant's award-winning combi and regular oil boilers are available as indoor or outdoor options as well as slim design combi units for freedom of installation. Grant's own technology includes a large heat exchanger that provides optimum hot water performance. Additionally, Grant's blue flame technology burns high concentrations of NOx to reduce emissions and prevent soot building up.

With so many boiler options to consider, the process of securing a new boiler can become tiresome and expensive. Using Boiler Guide's quotes service, you can eliminate some of this time and money by letting us find the best local engineers to install your new boiler.

Our network of professional heating engineers is licensed and vetted by us. We will provide you with up to 3 installer quotes, allowing you to save by selecting the best deal for you. Our service is free with no obligation. Click the link below to begin.

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Frequently Asked Questions

Which boiler brand offers the best warranty?

Ideal offers standard boiler cover from 2-12 years, which includes parts and labour for boiler services and replacements. Ideal also offers various options to extend your warranty period. Its warranty is subject to certain terms and conditions, including boiler registration within 30 days of installation.

 

Which boiler brand is the most affordable?

Among the most reputable boiler brands, Baxi offers the most competitive prices. The Baxi 224 Combi Gas Boiler will cost around £550, before installation. This includes a 3-year standard warranty.

 

Which boiler brand has the best reviews?

Ideal achieves the highest rating on Trustpilot from the top 10 UK boiler brands of 4.8 out of 5, with 21,788 reviews. Testimonials credit Ideal for exceptional customer service with efficient call-out and service times.

 

Which boiler brand has the best boilers for large homes? 

Vaillant's system boiler line includes the Vaillant ecoTEC plus System range with an available output of 64kW. This makes it suitable for very large homes with especially high demand for heating and hot water. There are also models in this range with outputs of 30kW, 37kW and 48kW which will also meet high energy demands.


Ciaran Wark

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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