Best Combi Boiler: Top 5 Boilers This Winter 2024

Which are the best combi boilers in the UK?

Looking for a reliable and efficient combi boiler for your home? Choosing the right boiler can feel overwhelming, but we’ve simplified the decision-making process for you.

Below, we highlight the best combi boilers in the UK for winter 2024, focusing on efficiency, reliability, and affordability.

Whether you need a compact option for a small home or a high-performance model for larger households, there’s a perfect fit for every budget and lifestyle.

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Quick Guide to Our Best Combi Boilers

• Best Overall: The Viessmann Vitodens 050-w is German-engineered, it offers reliable performance with a stainless steel heat exchanger and high modulation ratio make it one of the most energy efficient.
• Runner-Up: The Alpha E-tec is known for its reliability and ease of use; this comes with a 10-year warranty​​ as standard and is a great price at around £1,900
• Best Budget Option: The Worcester Bosch Greenstar 1000 is ideal for small to medium-sized homes, offering reduced electricity usage and protection against frost​​.
• Most Installed in the UK: The Ideal Logic C30 is compact and easy to use, popular among new-build developers, and offers a 10-year warranty​​.
• Feature-Rich Option: The Worcester Bosch 8000 is known for its power and reliability; it’s future-proof with built-in WiFi and high modulation ratios for efficiency.​​

#1 Viessmann Vitodens 050-W

By far the best combi boiler on the market overall, the Viessmann Vitodens 050-W is a compact, wall-mounted gas condensing boiler from one of the leading combi boiler brands, known for being one of the most energy-efficient boilers at a more than affordable price.

It’s designed to fit seamlessly into standard kitchen cupboards, making it an excellent choice for homes with limited space.

Best Bits:

• Stainless Steel Inox-Radial Heat Exchanger: Ensures high efficiency and long-term reliability.
• MatriX-Plus Burner with Lambda Pro Combustion Control: Provides efficient operation, quiet running, and low emissions.
• Integrated WiFi Interface: Allows for easy control via the ViCare app, enabling remote operation and monitoring.
• Energy Efficiency: ERP efficiency of 92% (Class A), contributing to reduced energy bills.
• Warranty: Comes with a 3-year comprehensive warranty as standard, extendable up to 7 years when installed by a Viessmann Trained Installer.
• Ideal For: Small to medium-sized homes seeking a reliable and efficient heating solution.

Read more: Viessmann Vitdoens 050 boiler review

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#2 Alpha E-Tec combi boiler

The Alpha E-Tec 28kW combi boiler offers a balance of performance and affordability.

This boiler is one of the cheapest on the market, and considering boiler installation costs is crucial, and the compact design of the Alpha E-Tec 28kW makes installation easier and potentially less expensive.

Its compact design allows for easy installation in tight spaces, making it suitable for various home sizes.

Other advantages of the Alpha E-Tec combi boiler include:

• Stainless Steel Heat Exchanger: Enhances durability and efficiency.
• High-Efficiency Grundfos Pump and Hydroblock Assembly: Ensures reliable performance and energy savings.
• User-Friendly Digital Interface: Simplifies operation and monitoring.
• Energy Efficiency: ERP A-rated, indicating high energy efficiency.
• Warranty: Offers a 10-year warranty, providing peace of mind.
• Ideal For: Homeowners looking for an efficient and cost-effective boiler with a solid warranty.

Read more: Alpha E-tec review

When choosing the best combi boilers for central heating and your home, we consider several variables, including your current boiler and the boiler installation process for a new combi boiler in its place.

If you decide a gas combi boiler is the best for you, you should look for a make and model you like, use our combi boiler reviews to help you decide if it’s right for your home, your central heating system, and also value for money.

#3 Worcester Bosch Greenstar 1000

The Worcester Bosch Greenstar 1000 is recognized as an energy efficient combi boiler, ideal for small to medium-sized homes.

Its modern design and advanced features make it a popular choice among homeowners.

Best Bits:

Here are some of the main benefits of the Greenstar 1000:

• Quick Tap Feature: Provides instant hot water, reducing water wastage.
• Compact Size: Fits easily into standard kitchen cupboards, saving space.
• Energy Efficiency: Achieves 94% efficiency, leading to lower energy bills.
• Warranty: Comes with a 5-7 year warranty, ensuring long-term reliability.
• Ideal For: Homes with limited space that require a reliable and efficient heating solution.

Why not get a fixed price online now for the Worcester Bosch 1000 combi boiler using our online price tool?

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#4 Ideal Logic C30

The Ideal Logic C30 is a versatile and efficient gas combi boiler, suitable for a range of home sizes.

Its user-friendly features and robust warranty make it a dependable choice for families.

Some of the other benefits of the Ideal Logic C30 combi boiler are:

• Available in Multiple Outputs: Offers 24kW, 30kW, and 35kW models to suit different heating needs.
• Digital Display: Provides easy-to-read information for simple operation.
• Frost Protection: Protects the boiler during colder months, enhancing longevity.
• Warranty: Includes a 5-year parts and labour warranty, with a 10-year warranty on the heat exchanger.
• Ideal For: Families seeking a reliable and adaptable boiler with comprehensive warranty coverage.

Read more: Ideal Logic C30 review

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5th Best Combi Boiler – Worcester Bosch 8000 LifeStyle

The Worcester Bosch Greenstar 8000 is a premium boiler designed for larger homes or those seeking advanced features.

Its high performance and smart technology integration make it a standout choice.

Other advantages of the 8000 Life and Style include:

• Smart Control Compatibility: Allows for remote operation and monitoring via mobile app.
• High Power Output: Ranges from 30kW to 50kW, catering to high-demand households.
• Stylish Design: Available in black or white to complement modern interiors.
• Warranty: Offers a 12-year warranty, ensuring long-term peace of mind.
• Ideal For: Tech-savvy homeowners with larger properties seeking a high-performance boiler.

Read more: Worcester Bosch 8000 Review

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6th Best Combi Boiler – Worcester Bosch Greenstar 4000

The Worcester Bosch Greenstar 4000 is a reliable heating system known for its quiet operation and compact design, making it suitable for small to medium-sized homes. Its reliable performance and user-friendly features make it a popular choice.

Some of the other benefits of the Worcester Bosch Greenstar 4000 combi boiler are:

• Low Noise Operation: Ensures a quiet home environment.
• Quick Tap Feature: Delivers instant hot water, reducing waste.
• Energy Efficiency: Rated A for efficiency, contributing to lower energy bills.
• Warranty: Comes with a 10-year warranty, providing long-term reliability.
• Ideal For: Homeowners seeking a quiet, efficient, and compact boiler solution.

Read more: Worcester Bosch 4000 combi boiler review or if you want a cheaper boiler but a Worcester check out our Worcester 2000 boiler review

How to Choose the Best Combi Boiler for Your Home

Choosing the right combi boiler is essential for maintaining a warm, energy-efficient home. With so many brands and models available, finding the perfect boiler can feel overwhelming. This guide breaks down the process, helping you make an informed decision quickly and stress-free.

Step 1: Determine What Your Home Needs

Before selecting a combi boiler, assess your home’s heating and hot water requirements. Think about factors such as:

• Property Size: Larger homes with multiple bathrooms will need higher power outputs, while smaller properties can opt for compact models.
• Hot Water Demand: Families with high hot water usage may benefit from a boiler with quick recovery and higher output.
• Outgoings: If you are looking for lowering your energy bills, then make sure to choose the most efficient combi boiler within your budget and output range.

Step 2: Explore Trusted Boiler Brands

Research is key when choosing a reliable combi boiler. Some of the best boiler brands on the market today include:

• Viessmann: Known for their energy efficiency and advanced technology.
• Worcester Bosch: A trusted name offering durable and efficient models.
• Ideal Boilers: Popular for their versatile and budget-friendly options.

To save time, look for brands that provide industry-leading warranties and high customer satisfaction ratings.

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Best Combi boiler Checklist

The top combi boilers can only be found in this guide and to ensure we have the right models we have ensured that we looked in every corner.

To find the best combi boiler models right now, we consider the following factors, which provide concrete evidence in finding the best gas combi boilers on the market:

• Is it a reliable boiler?
• Is it an energy efficient combi boiler?
• The manufacturer’s Trustpilot rating
• Market reputation of the brand
• Are there any awards, such as Which? Best Purchase
• How long does the warranty last?
• Price range in comparison to competing combi boiler brands
• Brand customer service and aftercare
• Hot water flow rate

All the top models in our list are some of the most energy-efficient combi boilers that not only keep your heating bills down and lower your carbon footprint but are reliable combi boilers that will also save you money on repairs and maintenance over the years to come.

What makes combination boilers so good?

Because a combi boiler heats water on demand for your taps and central heating, you only need one unit.

Because this type of boiler heats water as needed, it does not require bulky additional equipment like a cold water tank or a hot water storage cylinder.

Changing to a combi boiler is one of the most popular ways to increase energy efficiency in a small to medium-sized home that has a conventional boiler with a hot water tank.

Why are combi boilers so popular?

As a result, these boilers are compact and can be easily tucked into an airing cupboard or a tight recess. Combi boilers are one of the best options for homeowners who want to save money on their energy bills while also reducing their environmental impact.

The disadvantage of combi boilers is that, due to their small size, they are unable to meet high hot water demand, as a result, they are ideal for small properties with few bedrooms and bathrooms, such as flats, bungalows, and small houses.

Combi boilers are ideal for these properties because they are cost-effective in terms of both purchasing and installing the boiler as well as running it.

Sounds great, but they aren’t always the best choice for every home.

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Alternatives to a combi boiler?

A combi boiler may not be the best boiler for your lifestyle for some homeowners as they may not be the best choice if you have a large home with multiple bedrooms or if you already have a different type of boiler.

Combi boilers are currently among the most popular types of boilers on the market, but they are not the only ones.

System boilers

A system boiler is a solution that stores hot water in a hot water cylinder until it is needed for your home’s central heating system or to supply hot water to the taps.

As a result, system boilers including a tank take up more space and are slightly larger than combi boilers, but they are also more powerful and can accommodate larger homes.

Regular boilers

Regular, or heat-only, boilers are another popular option. These boilers necessitate the purchase of additional equipment, including not only the unit and the hot water cylinder but also a cold water tank and a hot water storage tank.

All of these components combine to form a powerful system capable of meeting the needs of large properties such as small commercial premises or large family homes with many people.

Combi boilers are the most cost-effective option, but if you require a more powerful solution, one of these boilers may be the best option.

Many systems and standard boilers are designed with energy efficiency in mind, so you can find an energy-efficient option that will save you money on energy bills while also benefiting the environment.

Before you decide on the type of boiler you want, you should learn more about the different types of boilers available.

Using this information, you can find the best boilers to meet your needs and provide you with excellent service for many years.

Read more: Condensing boiler vs combi boiler guide

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FAQS

How much do combi boilers cost?

The best combi boilers cost between £500 and £3,000 depending on the make and model you choose. All the boilers in our review are currently available to buy online from merchants. However, this will not include the combi boiler installation which is often the largest cost.

How much does combi boiler installation cost?

Buying a new combi boiler is all good and well. However, the actual cost of installing a combi boiler is often what makes the buying of a boiler more expensive. The average combi boiler installation cost in the UK is around £2,200 for a mid range model.

Which is the best combi boiler for a 2 bedroom home

A small property with only two bedrooms requires a small combi boiler, so choose a combi with a power output of 20 to 27 kW.

The most suitable boiler for a small flat, apartment, or house is

• The Vitodens 050-W 25kW combi boiler by Viessmann

If you have a small home, check out our small boilers review for more information on the best type to buy and if they will fit in tight spaces such as a kitchen cupboard!

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Which is the best combi boiler for a 3-bedroom home?

Boilers for homes with three bedrooms and higher hot water and heating demands may benefit from a more powerful boiler.

Typically, a combi boiler with a capacity of 28 to 35 kW could benefit the average home of this size.

The best combi boiler model for a two or three-bedroom house is:

• The Greenstar 4000 combi boiler by Worcester Bosch

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Which is the best combi boiler for a 4 bedroom home?

A combi boiler for a house with four bedrooms is over 35kw and the most common size for which a combi boiler is recommended.

A powerful combi boiler with 36 kW or higher is required for a 4-bedroom home with higher hot water demands and more radiators.

The best boiler model for a three to four-bedroom house is the Worcester Bosch 8000

Are combi boilers more efficient than other types of boilers?

Combi boilers are usually more efficient than regular boilers and system boilers due to them not having a water tank for storage. System and regular boilers will have to heat the water stored in the cylinder, meaning heat and energy are lost when this is cooled down and heated up. 

As the hot water is produced on demand, so there is very little water and energy waste in comparison and choosing the most efficient combi boiler shouldn’t be too hard as there is such a wide range to choose from.

Is it cheaper to run a combi boiler?

The lack of wasted energy and heat when a combi boiler operates also means it is cheaper to use than alternative boiler types.

You get hot water when you want it and there is no excess of it meaning less money is being spent on your boiler working overtime. 

Rather than having a storage tank, combi boilers get their supply straight from the mains, so it is only heated when needed. 

How long before I replace my combi boiler?

A combi boiler should last around 10-15 years, especially modern boilers with better technology so their efficiency will last longer. You can also make a combi boiler last longer by getting annual boiler service as Gas-Safe engineers will be able to examine and maintain your boiler for it to last.

Still unsure what combi boiler is best for you?

If you’re still unsure about which brand, model, and size of combi boiler is best for your home, consult a Gas Safe registered heating engineer.

Green Central work with boiler experts and Gas Safe installers who can help you find the best new combi boiler for your home and lifestyle, if your looking for something completely different, then check out our Navien boiler review, in which we discuss their claim that they are the best combi boilers in the world.

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Best boilers – Our verdict:

Selecting the best boiler for your home can be challenging because there are so many options available and every boiler manufacturer says they have the best boilers.

So that you can make an informed decision, we can include the cost of a Gas Safe registered engineer installing your boiler. An installer can be scheduled to install your boiler on a day that works for you.

You can choose the best combi boiler for your home and budget by consulting the combi boiler installation costs and boiler prices in front of you.

You’ll probably be able to find your ideal new boiler and the lowest boiler price when you shop with Green Central.

Additionally, we have some fantastic boiler finance offers that you can use to spread out the cost of your boiler and make monthly payments.

If you’re still unsure which combi boiler will be best for your home, get new boiler quotes in 20 seconds from nationwide boiler companies below:

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