The 6 best boiler brands in the UK - 2024 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 2000	An affordable, quiet combi boiler designed to slot seamlessly into place and keep your heating and hot water running reliably
Worcester Bosch Greenstar CDi	A compact combi boiler suitable for small, medium and large-sized properties with one or two bathrooms
Worcester Bosch Greenstar 4000	A modern boiler perfect for small to medium-sized homes with one bathroom, featuring an easy-to-use full-colour text display with quiet operation
Worcester Bosch Greenstar 8000	A sleek, design-led boiler with quiet operation without compromising on power
Worcester Bosch Greenstar Ri	A compact, wall-mounted boiler that is perfect for small and medium-sized homes

2. Vaillant boilers

Vaillant was first established way back in 1874, 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 plus	A first-class combi boiler available in higher outputs that are ideal for larger homes, offering heaps of power without the noise
ecoTEC Exclusive Green iQ	A premium combi boiler with advanced energy-saving features and smart home compatibility
ecoFIT Pure	A 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 ON	A cutting-edge combi boiler that can deliver hot water to three bathrooms simultaneously
NCB500 ON	A combi boiler suitable for family homes, offering superb hot water comfort, powerful heating and flexible installation options
NCB300	A 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 1866. 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 600	A versatile combi boiler that produces hot water in an instant
Baxi Megaflo	A 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 Boiler

A 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 1906, 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 protection
Vogue Max	A 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.

Consult with a professional heating engineer

Heating engineers have in-depth knowledge of various boiler brands and models, so you should seek their advice before making your final decision. They can assess your specific heating needs, the size of your property, and your hot water demands to provide tailored recommendations that align with your requirements.

When you buy a boiler through BOXT, we'll provide recommendations of the most suitable boiler makes and models in minutes.

Once you've made your choice, it's essential to have your boiler installed by an experienced Gas Safe registered engineer. Our engineers can deliver and install your new boiler in as little as 24 hours.

Weigh up short and long-term costs

By carefully weighing both the short and long-term costs of different boiler brands, you can make an informed decision that sits within your budget both when you buy your new boiler and when you're running it day-to-day.

Short-term costs include the initial purchase price and installation expenses. While we, as buyers, might have a tendency to focus solely on these upfront costs, a more expensive boiler with higher energy efficiency can result in lower long-term operational costs.

Long-term costs should account for maintenance and potential repair costs. While high-quality boilers may have higher upfront costs, they often come with better build quality and reliability, reducing the likelihood of breakdowns. Plus, in most cases they offer a longer warranty too.

Find energy efficiency ratings

Energy-efficient boilers consume less fuel, leading to lower energy bills and more money in your pocket. Understanding the energy efficiency ratings of different models helps you choose a boiler that can provide significant long-term cost savings on your energy expenses.

Check for warranty

Consider the warranty offered by each brand. A longer warranty period can provide peace of mind and act as a testament to the brand's durability.

We'd also recommend checking the availability of customer support. Knowing that reliable customer support is available can be crucial if you encounter issues with your boiler. A responsive and accessible customer support team can help address concerns, provide guidance, and facilitate repairs.

A brand that stands behind its products with strong warranties and excellent customer support is likely to have a positive reputation in the market. Researching customer reviews can provide insights into how satisfied users are with a brand's support services.