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Best Boilers & brands in the UK in 2024: Top 5

Ciaran Wark
By: Ciaran Wark
Updated: 7th June 2024

  • Viessmann Vitodens 100-W, Alpha E-Tec, Ideal Logic, Worcester Bosch Greenstar 4000, Baxi 800 Combi are the best boilers in the UK.
  • Worcester Bosch, Baxi, Ideal, Alpha, and Viessmann make the most reliable 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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How we chose the best boilers & best boiler brands

best boilers factors

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 boilers?

There’s no single “best” boiler for everyone, as factors such as budget, home size, and heating needs vary. However, several reliable boiler models have consistently ranked high in terms of efficiency, performance and warranty. These top boilers include:

  • Viessmann Vitodens 100-W: Known for its advanced technology and high efficiency.
  • Alpha E-Tec: Provides a good balance between affordability and performance.
  • Ideal Logic Range: Popular choice for budget-friendly boilers with good warranties.
  • Worcester Bosch Greenstar 4000: Renowned for reliability and excellent customer service.
  • Baxi 800 Combi: Known for its high efficiency levels and generous warranty period.

Additional features to take into consideration are the type of boiler you choose, kW output and heating controls. So, what other features do the best boilers currently available for UK homeowners have? Here’s a quick rundown:

best boiler models

#1 Viessmann Vitodens 100-W

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

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

Ideal Logic

  • 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 4000

Worcester Bosch Greenstar 4000

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

Worcester Bosch Greenstar 4000 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

Baxi 800

  • 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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What are the best boiler brands in the UK?

1. Worcester Bosch

  • In 2022, 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 8000 Life 45kW Combi and the Bosch Art Project.

Worcester Bosch boiler brand
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 boiler brand

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. Additionally, they offer some of the longest warranty periods on the market, with options up to 12 years.

3. Baxi

  • Started in 1938 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 2025, aligning to achieve a net-zero economy.

Baxi boiler brand

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 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 boiler brand

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.

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 boiler brand

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:

  1. 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.
  2. 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).
  3. 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.
  4. Compare: Get quotes from several boiler installers to compare prices and services and decide which best boilers from our list suit your heating requirements.
  5. 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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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.

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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