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Which is the Best Combi Boiler in 2024? Top 7 Combi Boilers

Which is the Best Combi Boiler in 2024? Top 7 Combi Boilers

The Top Rated Combi Boilers in 2024

Struggling to find the perfect combi boiler for your home? Our in-depth guide cuts through the confusion, revealing the crème de la crème of combi boilers ideal for typical households.

Our review includes everything you need including:

  • Expert Chosen List: We’ve meticulously handpicked the best combi boilers boasting exceptional efficiency, reliability, and affordability.
  • A-Rated Champions: Each featured boiler prioritises energy savings, earning the coveted A-rating for peak performance.
  • Peace of Mind, Guaranteed: Enjoy long-lasting warranties exceeding 10 years, ensuring worry-free heating for your home.
  • Expert Insights: Learn the crucial factors to consider when selecting a new combi boiler, empowering you to make an informed decision.

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How to choose the best gas combi boiler

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Selecting the right combi boiler for your home demands thoughtful consideration, as each home’s needs may vary. To ensure you make an informed choice, take into account the following factors:

  • Output Variety: Explore the range of options available in terms of output to match your home’s requirements.
  • Style Diversity: A gas Boiler comes in various styles, such as system and regular types, catering to different setups.
  • Our Picks: Consult our curated list of the best gas combi boilers, tailored to meet diverse needs and preferences.
  • Feature Highlights: Discover the standout features offered by leading gas boiler brands, aiding in your decision-making process.
  • Trusted Brands: Consider reputable names like Worcester Bosch and Ideal, known for their reliability and performance.
  • Premium Options: Explore high-quality alternatives like Viessmann Boiler, ensuring top-notch performance and efficiency for your home.
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Best combi boiler in 2024 – The best UK boilers this year so far

When looking at replacement combi boilers amidst a bunch of options from diverse brands can be daunting. To streamline your decision-making process, we’ve meticulously curated a list of the top 7 natural gas boilers, each offering exceptional performance and reliability.

Our selection criteria revolve around certain features that are pivotal in combi boilers, encompassing aspects like new boiler costs and overall value proposition.

For those contemplating a new boiler installation, we’ve also included insights into the latest new combi boiler installation costs to aid in your planning process.

Why are these the best boilers to buy right now?

When comparing these gas boilers, the standout factor is their exceptional value for money combined with unmatched reliability and extensive warranties.

With the escalating energy prices, we prioritise efficiency in our selection process, to help lower your energy bills.

Now, you can conveniently compare prices online and have these combi boilers installed the very next day by a Gas Safe registered engineer through Easy Boilers, all at a fixed price available online.

Simply answer a few questions about your home and existing heating setup , and receive a tailored quote for the best combi boilers perfectly suited to your requirements.

Our top 7 best combi boilers in the uk

RankCombi BoilerOur Rating
1Viessmann Vitodens 0509/10
2Worcester Bosch Greenstar 40008.5/10
3Worcester Bosch Greenstar 20008/10
4Ideal logic C308/10
5Worcester Bosch 80007.5/10
6Viessmann Vitodens 100-w8.5/10
7Vaillant ecoTEC7/10

#1 Best Combi Boiler – Viessmann Vitodens 050-w 

Viessmann Vitodens 050-w

Looking for the best combi boiler in the UK? Look no further than the Viessmann Vitodens 050-W. It dethrones rivals like Worcester Bosch Greenstar with its unbeatable combination of features and value.

Why is the Vitodens 050-W the King of Combi Boilers?

  • Unmatched Value: This isn’t just a high-performance boiler; it’s packed with features at an exceptional price point compared to performance!
  • Future-Proof Technology: The Vitodens 050-W is hydrogen-ready (up to 20% blend), making it a sustainable choice for the future of heating.
  • Smart and Space-Saving: Built-in Wi-Fi allows for smart home integration, while its compact design fits discreetly into kitchen cupboards or complements your space openly.
  • Legendary Reliability: Viessmann is renowned for German engineering excellence. These boilers boast a 10-year warranty and consistently top reliability rankings.
  • Effortless Heating: The Vitodens 050-W features a durable stainless steel heat exchanger, premium components, and cutting-edge technology for worry-free central heating year-round.

Is this the most reliable combi boiler on the market?

Originating from renowned German manufacturer Viessmann, these combi boilers pride themselves on reliability and longevity, boasting an impressive 10-year warranty as standard, all super competitively priced.

They generally come out on top as the most reliable combis year after year in most best combi boiler reviews.

This gas boiler ensures hassle-free central heating system throughout the year with its durable stainless steel heat exchanger, cutting-edge hydrogen blend readiness, and premium-quality components.

#2 Best Combi Boiler – Worcester Bosch Greenstar 4000

Worcester Bosch Greenstar 4000

The Viessmann Vitodens 050-W might have taken the top spot, but the Worcester Bosch Greenstar 4000 remains a compelling choice for many UK households. Here’s why:

Top Reasons to Choose the Worcester Bosch Greenstar 4000:

  • Excellent Performance: This boiler boasts impressive specifications, earning Which? Best Buy and Quiet Mark accreditations for efficiency and noise reduction.
  • Seamless Upgrade: The Greenstar 4000’s dimensions perfectly match the older Greenstar i, simplifying boiler replacement.
  • User-Friendly Features: An intuitive LCD display and Worcester Bosch’s renowned aftercare service ensure a hassle-free experience.
  • Reliable Choice: Backed by a solid 10-year warranty from Worcester Bosch.
  • Mid-Range Value: This popular mid-range boiler offers consistent performance at a competitive price point.
  • Budget-Friendly Option: For those seeking a more affordable alternative, consider the Worcester Bosch 1000 combi boiler.
  • Easy Installation Quotes: Get a fixed-price quote for installing the Greenstar 4000 in under 20 seconds with Easy Boilers.

Thinking About the Greenstar 4000?

Don’t let its runner-up status deter you. The Greenstar 4000 is a strong contender with excellent performance, a user-friendly design, and a reliable warranty. Secure a quick installation quote and explore if this high-performing boiler aligns with your needs.

Quick comparison of the top 2!

While the Worcester Bosch Greenstar 4000 remains a strong contender, the Viessmann Vitodens 050-W edges it out as the superior combi boiler for UK homes. Here’s a breakdown:

Viessmann Edges Out Worcester Bosch Greenstar 4000:

  • Cost-Effectiveness: The Vitodens 050-W boasts a competitive price point compared to the Greenstar 4000.
  • Superior Reliability: Viessmann’s reputation for German engineering excellence translates to exceptional reliability, as evidenced by their 10-year warranty.
  • Space-Saving Design: The Vitodens 050-W’s compact design offers greater flexibility in tight spaces compared to the Greenstar 4000.

Seeking a more budget-friendly option? Explore our review of the new Worcester Bosch 1000 combi boiler here.

#3 Best Combi Boiler – Worcester Bosch Greenstar 2000 

If you’re familiar with the best combi boilers, you won’t be surprised to find another Worcester Bosch model ranking near the top of our list.

Worcester Bosch Greenstar 2000

The Worcester Bosch 2000 marks their debut in the budget boiler market, a noteworthy development for the renowned brand.

For those new to combi boilers, Worcester Bosch are one of the leading boiler manufacturers, they are one of the best combi boiler brands, and can be compared to the Nike sportswear brand, but in the boiler industry.

With a legacy spanning over a decade, they’ve been a dominant force in the UK boiler market, particularly with their now-discontinued Greenstar i combi boiler range.

Worcester Bosch boilers and their prices are known to offer excellent value, considering the quality they deliver.

Why is the Worcester 2000 the 3rd best boiler?

  • Worcester 2000 offers energy and water-saving features.
  • Priced at approximately £1,695, including installation.
  • Six-year warranty and positive online reviews.
  • Consistently among best-sellers since 2019.
  • Available in 25kW and 30kW options.
  • Fits snugly into kitchen cupboards.
  • Quiet Mark accreditation for minimal noise.
  • Hassle-free installation and maintenance.
  • Worcester Bosch known for excellence.
  • Get a quick quote online with Easy Boilers.

Worcester Bosch stands out as one of the premier manufacturers in the UK, known for their top-quality products.

If the Worcester 2000 seems like the right boiler for your needs, you can quickly get a quote for it online in under 20 seconds with Easy Boilers.

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#4 Best gas combi boiler – Ideal Logic combi boiler

Ideal Logic combi boiler

The Ideal Logic combi boiler has kept its presence in the market for an extended period, and there’s a clear reason for its longevity.

As a budget-friendly, dependable, and space-saving option, the Ideal Logic caters to the needs and budgets of many homeowners.

Favoured for its reliability and compact design, the Ideal Logic ranks as one of the most frequently installed boilers in the UK.

Additionally, Ideal gas boilers are the preferred choice for new-build contractors nationwide, thanks to their remarkable energy efficiency, leaving you with lower energy bills.

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Why is the Ideal Logic our 4th best combi boiler?

Ideal Logic combi boiler: priced affordably under £1,800.

  • Renowned for reliability with a robust warranty.
  • Compact design ideal for kitchen cupboards.
  • Quiet Mark accreditation for quiet operation.
  • Available in 25kW, 30kW, and 35kW outputs.
  • Hydrogen-ready for future energy needs.
  • Excellent choice for small to medium-sized homes.
  • Get a quick online quote with Easy Boilers.

Ideal for small to medium-sized homes throughout the UK, the Ideal Logic combi boiler offers reliable performance and efficiency.

Looking for some combi boiler deals? Explore pricing options quickly and conveniently online with Easy Boilers in under 20 seconds.

#5 Best Combi Boiler – Worcester Bosch 8000

Worcester Bosch 8000

The Worcester Bosch 8000 stands out as the pinnacle of combi boilers, boasting great features and a stylish design.

Unlike most of the best combi boilers, the Worcester Bosch 8000 is made to be showcased rather than hidden away, with its sleek gloss black style range adding a touch of elegance to any space.

The Worcester Bosch 8000 is known for its power and reliability, this combi boiler is backed by an impressive 12-year warranty. However, its premium price tag is the only factor preventing it from claiming the top spot in our rankings.

Why is the Worcester 8000 our 5th best boiler?

When it comes to value for money, the Worcester 8000 gas combi boiler delivers impressive performance and features.

While it functions similarly to other combi boilers in terms of heating water and radiators, the Worcester 8000 stands out for its added power, particularly the 40kW model which remains a top seller.

Priced at £2,400 including installation, it’s more expensive than the Worcester 2000 by over £700, yet offers premium components, built-in Wifi, and a visually stunning design.

Plus, it’s backed by a generous 12-year guarantee.

  • Available in 6 different outputs 25kw, 30kw, 35kw, 40kw, 45kw & 50kw
  • Great Aftercare
  • Hydrogen ready
  • It’s available in two distinct colours.

If the price isn’t a concern, obtain a quick quote online in just 20 seconds with Easy Boilers.

Alternatively, explore the Worcester 4000 as a more budget-friendly alternative.

#6 Best combi boiler – Viessmann Vitodens 100-w

Viessmann Vitodens 100-w

Making its mark as the upscale counterpart to the Vitodens 050-W, the Vitodens 100-W earns its spot on our list for good reason.

As a powerful and dependable combi boiler, it boasts an impressive 10-year warranty.

Engineered in Germany, the Viessmann Vitodens 100-W stands out as one of the most reliable combi boilers available, promising years of trouble-free central heating.

Notably, it competes directly with the Worcester 8000 but comes at a more affordable price point, approximately £150 cheaper.

So for those prioritising performance over aesthetics, this makes it an ideal choice.

Why is the Viessmann 100 the 6th best combi boiler?

  • Priced at around £2,250, including installation, offering excellent value for money.
  • Lengthy warranty, built-in Wifi, and hydrogen readiness ensure reliability.
  • Exceptional aftercare services provided.
  • Available in three different outputs to suit various household needs.
  • Obtain a fixed-price quote online in under 20 seconds with Easy Boilers.

#7 Best Combi Boiler – Vaillant ecoTEC 

Vaillant ecoTEC Combi Boiler

Vaillant stands out in other best combi boiler reviews as a renowned boiler brand, continually striving to enhance energy efficiency in compliance with the ERP directive.

While Vaillant combi boilers may not be the most budget-friendly option, their exceptional build quality renders them a top choice, particularly for those seeking consistent hot water flow temperatures.

The Vaillant ecoTEC exclusive with Green IQ stands as a prime example of their commitment to energy efficiency, ranking among the most environmentally friendly boilers, helping lower your carbon footprint.

Why is the Vaillant ecoTEC the 7th best combi?

  • Vaillant Ecotec boilers are reliable and energy efficient combi boiler combi boilers excel in reliability and energy efficiency.
  • Homeowners enjoy peace of mind with excellent aftercare and ten-year warranties.
  • Boasting power outputs of 35kW and 43kW, with high flow rates.
  • Quiet Mark accreditation guarantees quiet operation for improved user experience.
  • Explore the Vaillant ecoTEC range for quality boilers.
  • Get competitive online pricing with fixed quotes in under 20 seconds through Easy Boilers.
  • Brands in the boiler industry must prioritise reliability and cost-effectiveness by making their combi boilers cheaper.

Looking for one of Vaillant’s top boilers?

Secure a great price on the Vaillant ecoTEC boiler online now, with fixed quotes available in under 20 seconds through Easy Boilers.

In the competitive boiler industry, brands must prioritise producing top-quality boilers and establishing a strong reputation for reliability and cost-effectiveness.

Comparing combi boilers and what we consider

Here’s the usual checklist for evaluating the quality of a combi boiler:

Best Combi Boiler
  • Combi Boiler Specifications: Assess the technical specifications to ensure they meet your heating needs.
  • Price and Value: Consider the price of the combi boiler in relation to its features and overall value for money.
  • Reliability: Look for reliable boilers and durable combi boilers.
  • Warranty Length: Check the length of the boiler warranty for added peace of mind.
  • Energy Efficiency: Opt for energy-efficient combi boilers to minimise energy costs.
  • Online Reviews: Research and read online reviews from other users to gauge their experiences with the boiler.
  • Issue Reports: Investigate any reported issues or concerns raised by users online.
  • Customer Service: Evaluate the quality of customer service and aftercare provided by the manufacturer.
  • Size and Fit: Determine if the boiler can fit conveniently in a kitchen cupboard or designated space.

Choosing the best combi boiler involves considering all these factors to ensure hassle-free heating and optimal performance.

Additionally, selecting energy-efficient boiler models can help mitigate the impact of rising energy prices, providing long-term savings.

Best boiler brands from sales in the UK

Explore our curated selection of gas combi boilers from leading brands in the industry. Here’s our shortlist of top boiler manufacturers, and top choice boiler brand to buy from:

  • Worcester Bosch
  • Viessmann
  • Ideal
  • Alpha Innovations
  • Vaillant
  • Glow Worm

Discover the comprehensive range of boilers offered by these esteemed brands to find the perfect fit for your central heating needs.

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Choosing the most reliable Combi Boiler

When selecting the most dependable boilers, we leverage our extensive expertise to pinpoint the standout qualities of the top combi boilers in 2024:

  • Sales Performance: Analysing sales data to identify boilers with strong market demand and customer satisfaction.
  • Customer Feedback: Gathering insights from reputable platforms such as Trustpilot to understand user experiences and satisfaction levels.
  • Prioritising Experiences: Placing emphasis on valuing the experiences of others to inform decision-making processes.

In the quest for the ideal boiler system, it’s important to recognise that choosing the right home heating systems holds greater significance than simply opting for the best combi boiler available.

Combi Boiler Vs storage combi boiler

When comparing combi boilers to storage combi boilers, there are key differences to consider. Combi boilers, like the Viessmann Vitodens 100-W, provide hot water on demand directly from the mains without the need for a separate hot water cylinder.

They are compact and space-saving, making them ideal for smaller properties. On the other hand, storage combi boilers, such as the Viessmann Vitodens 111-W Storage and Vaillant ecoTEC Store, incorporate a built-in hot water storage tank.

While storage combi boilers may offer higher hot water flow rates and are suitable for properties with higher hot water demands, they require more space for installation.

Ultimately, the choice between a combi boiler and a storage combi boiler depends on factors such as your property size, hot water usage patterns, and space availability.

Why is choosing the right boiler for you important?

In our selection of combi boilers, including best combi boiler models like the Viessmann Vitodens 050-W, Worcester 2000, and Ideal Logic, a 30kW output is prevalent.

These boilers are ideally suited for heating small to medium-sized homes effectively.

For larger residences requiring more power, consider upgrading to a powerful 40kW combi boiler, capable of supporting multiple bathrooms simultaneously.

Advanced Combi Boiler Features for Peak Efficiency and Comfort

Upgrade Your Home Heating with Smart Combi Boiler Technology

Looking to maximize efficiency and comfort in your home’s heating system? Combi boilers are a powerful solution, offering a compact design, on-demand hot water, and cutting-edge features like weather compensation and smart controls.

But what exactly makes them so advanced? Let’s delve into the key features that set combi boilers apart:

Weather Wizardry: Weather Compensation Systems

Imagine a boiler that adjusts its output based on the outside temperature. That’s the magic of weather compensation! By using an external sensor or local weather data, combi boilers equipped with this feature optimize performance for your specific needs.

This translates to reduced energy consumption, consistent indoor temperatures, and less frequent boiler cycling – perfect for homes with constant occupancy.

Precision Power: Modulating Burners

Unlike traditional boilers that blast heat at full capacity, modulating burners are the ultimate energy-saving champions. They adjust their output to precisely match your heating demand.

Imagine a burner that seamlessly shifts between 5kW and 18kW – that’s the kind of flexibility you get! This not only boosts efficiency but also lowers fuel costs. Look for combi boilers with a high modulation ratio for superior comfort and consistent warmth.

Smart Heating, Smarter You: Smart Control Systems

The future of heating is here! Smart controls elevate combi boilers to a whole new level. These systems learn your habits, occupancy patterns, and even leverage geofencing to personalize your heating.

Imagine a system that automatically adjusts based on your schedule or warms up the house as you approach.

With advanced features like internet-based weather compensation and remote control via smartphone apps (think Worcester Bosch Wave), smart controls elevate convenience and maximize energy savings.

Beyond the Basics: Combi Boilers vs. The Competition

While combi boilers offer numerous benefits, understanding how they compare to other boiler types is crucial. Here’s a quick breakdown:

Space-Saving Champions: Combi Boilers vs. Conventional Boilers

Conventional boilers with hot water tanks are great for large households with high hot water demand. However, they require significant space due to the separate tank setup.

Combi boilers, on the other hand, are compact and ideal for smaller homes, eliminating the need for bulky tanks.

The Middle Ground: Combi Boilers vs. System Boilers

System boilers offer a balance by using a hot water cylinder for high hot water demands but eliminating the need for a cold water storage tank. This translates to more space compared to combi boilers, but less compared to conventional setups.

The Right Choice for Your home

By understanding advanced combi boiler features and their comparison to other boiler types, you can make an informed decision. Consider factors like your home size, water pressure, and hot water needs to find the perfect fit for ultimate comfort and energy efficiency.

Bonus Tip: Include long-tail keywords throughout your content to target specific user searches. For example, “best combi boiler with weather compensation” or “smart combi boiler controls for multiple zones.”


What are Combination Boilers?

Combi boilers are modern boilers that are a popular heating solution, swiftly generates hot water by tapping into the mains water supply. Typically fuelled by natural gas, these boilers utilise a heat exchange mechanism to warm the water.

This involves burning natural gas to heat dual heat exchangers, eliminating the need for a hot water cylinder which then transfer the heat to the incoming cold water and giving you hot water on demand, unlike a system boiler.

Can combi boilers offer cost savings compared to regular boilers?

Indeed, they do. Combi boilers tend to be more cost-effective, especially for smaller homes. Many consumers make the switch from conventional boilers to combi boilers primarily to save on energy expenses,

An efficient combi boiler is the much more popular option due to it’s cost savings, compared to oil boilers, electric boilers, system and conventional boilers.

Wondering if a combi boiler can handle running multiple showers simultaneously?

The answer depends on the flow rate and wattage of your specific combi boiler.

Typically, a smaller boiler with a 24kW output may struggle to run two showers concurrently. However, a higher output unit, for a powerful combi boiler such as a 40kW or above, may be capable of doing so, provided your home’s water pressure is adequate.

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How much does a new combi boiler cost?

If you find yourself wondering, how much to combi boilers cost? Well, the cost typically ranges from £450 to £3,000, depending on the make and model.

However, if you’re considering installation alongside the combi boiler purchase, expect the total cost to be substantially higher.

On average, the total expense for a mid-range combi boiler like the Worcester 4000, including installation, boiler costs are around £2,200 on average for a direct combi swap.

Converting from a system boiler to a combi boiler will incur significantly higher installation costs. Additionally, it’s wise to compare quotes as prices may vary, with some providers like British Gas charging higher rates.

What are the best electric combi boilers?

if you are looking for something different, then you could also consider an electric combi boiler which is stated to run at 100% efficiency. This does not however make them a better option as they cost far more to run due to the higher cost of electricity. See our best electric combi boiler guide here for more information.

What is the most reliable boiler brand?

In the UK, the top 5 gas boiler boiler brands with outstanding combi boiler reviews are Worcester Bosch, Baxi, Ideal, Viessmann, and Vaillant. Renowned for their reliability, all these brands consistently earn high customer service ratings, offer impressive warranties, and have received numerous excellence awards.

Rest assured, regardless of the combi boiler brand you opt for, you can expect to receive a top-quality product and exceptional service. Get a great deal in our combi boiler clearance sale here!

can you buy a combi boiler on finance?

Yes, many combi boiler suppliers and installers offer financing options for purchasing a combi boiler. Financing allows you to spread the cost of the combi boiler over a period of time, usually through monthly payments. You can inquire with your chosen supplier or installer to learn more about their financing options and whether you qualify.

What is the best combi boiler for a large home?

Searching for the ideal combi gas boiler for a large home? Look no further than the Worcester 8000 40kW combi, one of the most powerful combi boilers. However, it’s worth considering a system boiler with a separate hot or cold water tank for larger homes, as combi boilers may struggle to meet the hot water demand from multiple taps simultaneously, relying on mains water pressure.

Why should I choose a combi over a system boiler?

Choosing a combi boiler over system boilers offers several advantages. Modern combi boilers are space-saving, providing on-demand hot water directly from the mains without the need for a separate cylinder. They are energy-efficient, heating water only when needed, and often require simpler installation. Additionally, combi boilers are cost-effective, with lower upfront costs compared to system boilers.

How often should I get my combi boiler serviced?

It’s recommended to have your combi boiler serviced annually by a qualified heating engineer. Regular servicing helps ensure optimal boiler efficiency and extends the lifespan of your system. By maintaining a schedule of annual servicing, you can keep your boiler running smoothly and ensure it remains an efficient and reliable source of heating and hot water for your home.

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