The Best Boilers and Boiler Brands in 2022 (Expert Guide)
The best boilers are those that last long, cost a fair price to install, and don’t require too many specialized engineer visits. But researching the best boiler brands can be a daunting task, especially since all of them claim to be the ‘best.’
That’s why we’ve put our gloves on, spent hundreds of hours assessing boiler manufacturers, and narrowed our list down to just 10 — the absolute best buys. Our analysis will give you the most essential information about the top boilers on the market, with side-by-side price comparison between the brands.
Installing a new boiler doesn’t come cheap. A typical combi could cost £2,000 – £3,000, including labour. Boilers that run on oil tend to be even more expensive. Based on fuel types, we’ve split this guide on best boilers into two sections
- oil and
- natural gas boilers.
Most manufacturers will make combi, system, and regular boilers that are powered by natural gas or LPG. If yours is powered by oil, we’ve listed 3 of the best oil brands at the end of our guide.
Need a replacement boiler fast? Here is our shortlist of the best boiler brands
Table of Contents
What Are the Best Boiler Brands
The 10 best boiler brands on the market are
The number one on our list of boiler makes is certainly the most well-known — Worcester Bosch is considered by many to be one of the best boiler manufacturers out there.
Its diverse range of boilers is known for being well-built, reliable, efficient, and the long guarantees prove that the company has great faith in its boilers. Unlike traditional warranties, Worcester’s guarantee actually means that the manufacturer is 100% committed to repairing the device should it malfunction. It’s no wonder that Worcester Bosch is widely recognized as a leader in aftercare.
Note that the exact guarantee period depends on the boiler you choose and the other Worcester-branded products you use. For instance, adding a Worcester Bosch system filter will add on a further year’s guarantee.
Worcester offer heating solutions of different shapes, sizes, and fuel types, to serve a variety of heating systems. These include:
- Oil boiler
- Combi boiler
- System boiler
- Regular boiler
Of these, the company has had the most success with models like the CDI and a Greenstar 4000. These boilers are incredibly efficient and come in an array of power outputs and sizes. The smaller ones handily fit into your kitchen cupboard — great if you live in a smaller space, like most UK residents.
Price Range Comparison
Worcester Bosch boilers are comparable in price to Baxi and Vaillant. For instance, you can typically get a Worcester Greenstar 4000 30kW for around £2,200-£2,400.
But with the launch of online boiler installers like Heatable, where you can get an online quote by filling out a form, high energy efficiency boilers from Worcester Bosch are now fitted for more affordable prices.
You can check out their price range by using their online boiler price calculator. It takes around 90 seconds, and no personal details are needed to get your price for a Worcester Bosch boiler.
If you plan on bringing German engineering into your home, know that Viessmann are the largest boiler manufacturer in Europe; and no list of best boilers is complete without this brand.
Relied upon for their ruthless boiler energy efficiency and because they also tend to last longer than the competition, Viessmann boilers have snagged a Which Best Buy boilers award for being able to offer hot water and heating right when you need it.
The company’s stallions are the Viessmann Vitodens 050-W, an outstanding choice for an entry-level natural gas boiler boiler, and the Viessmann Vitodens 100-W, one of the best combi boilers on the market.
The Viessmann Vitodens 050-W prices range between £2,100 and £2,300, whilst the Vitodens 100-W is a bit pricier, typically costing £2,500 and up. However, you may be able to get a better deal with Heatable.
If you opt for Heatable installation, you’ll also get a massive, 10-year warranty on either of these Viessmann models.
Next on our list of the best boiler brands are Ideal Boilers, a century-old, reputable British manufacturer that has grown exceptionally over the last decade. They now sell over 10,000 units per year and offer 3 boiler types — combi boilers, system boilers, and heat-only boilers.
The company’s combis and system boilers are an excellent choice for smaller homes, as they’re incredibly compact and highly efficient — something you’ll notcie on your energy bills over time.
The combi boilers are great if you have fewer bathrooms and showers in your home, whereas their system peers are a better fit if your household has demanding hot water needs. They’re also ready to run on a 20% hydrogen blend out of the box.
Ideal’s combis and system boilers come with warranties ranging between 7 and 12 years — some of the longest on the market (although you’ll need a Max-certified installer to get the full 12 years — without one, it’s 10, which is still relatively long). On the other hand, its regular boilers have shorter warranty periods — from 2 to 7 years, depending on the model.
Ideal Boilers are generally the odd one out. They are known as a premium brand, but they sit in the mid-range in terms of price. The Ideal boiler models that rival Worcester Bosch tend to be 10-15% cheaper when using a local installer.
Vaillant are another of UK-made boiler manufacturers right up with there with the best. Most recently, Vaillant’s ecoTEC range has become their most popular product line, and the ecoTEC exclusive with Green iQ combi boiler is the winner of the 2018 Housebuilder Products Awards. This boiler is rather powerful, with an output of either 35 or 43kW, so it’s best suited for larger homes.
That said, Vaillant has plenty of other models in this range that are suitable for smaller properties. Of these, the ecoTEC plus combi is the top all-rounder. It comes with 25kW, 32kW, 35kW, and 38kW outputs, and offers warranties between 2 and 10 years, depending on whom you get to install the device.
The ecoTEC plus combi also has a handy ‘smart’ feature that tracks your heating and hot water use and automatically lowers the power to a mere 16% of its full capacity when you don’t need much heat.
Expect Vaillant boilers to be in a similar price bracket to Worcester and Ideal Boilers’ equivalent products. Depending on the boiler, the purchase and installation can set you back anywhere between £1,900 and £3,900.
Baxi’s quality rivals all the best boiler brands, including Worcester Bosch and Ideal. That said, the venerable British manufacturer (in operation since 1866) is notably less expensive than these top-shelf brands.
Like these brands, Baxi offers a range of boilers, including system, regular and combi boilers. Each of the ranges has a massive selection of models, so picking the right one for your property might take some research and expert advice.
However, you can’t really go wrong with the Baxi 800 Combi. It comes in 25kW, 30kW, and 36kW sizes, and is compact enough to fit into your kitchen cupboard. The model has an array of features, including:
- Magnetic filter to keep your radiators clear of sludge
- Easy-fill permanent filling link, so you don’t need a Gas Safe engineer to top up your heating system
- Opentherm interface, which lets you modulate the boiler’s operation
Parts and labour have a 10-year warranty on the Baxi 800.
Price-wise, expect Baxi boilers to be cheaper than a Worcester Bosch equivalent. Together with installation, you’ll pay anywhere between £1,500 and £2,200, depending on the model.
- 7-year parts and labour warranty
- Stainless steel heat exchanger
- Italian design and engineering
Despite being cheaper than equivalent products by some of the top-tier competition, Alpha’s boilers are known to be highly reliable and efficient. Customer reviews from boiler owners also praise them for good after-sales service.
While Alpha’s boilers come with a 7-year warranty by default, you can upgrade to a 10-year warranty if you get Heatable to install the boiler for you.
The Alpha E-Tec is crazy cheap, often starting at just £1,800, installation included. You can check prices online by simply filling out a form (without any personal information) — just 90 seconds to get it done.
The old and new boilers from Potteron are well built, and tend to last. At least that was the general consensus, until they started to trying to make cheaper boilers, which led to a reduction in warranty to just 2-years.
And, that doesn’t exactly fill a buyer with confidence.
Potterton tend to sit just below Worcester, Vaillant, and Baxi in terms of price; similar to the Ideal.
And, given all of the above boiler brands are bigger, and have a better customer service network, those are the brands that heating engineers tend to install.
8. Glow Worm
Glow-Worm tends to sit in the category of “best of the rest”, with other boiler makes such as Vokera, Intergas, and Potterton.
Glow-Worm are a cheap boiler company. They tend to be used on budget renovations and rental properties.
Reliability-wise, they’re certainly not known for being up there with the likes of Vaillant, Worcester, Ideal and Baxi.
That said, they do offer 2 and 5 year warranties on their boilers, so in the short-term, they’re cost effective.
It’s not all bad news. Glow-Worm boilers are regularly priced as “special offers” at local plumbing merchants.
So, that means they are cheap to buy, and cheap to install. Expect Glow-Worm to be priced similar to Vokera boilers, if not a little cheaper.
Over its 50+ years in business, Intergas has perfected a boiler design that has shockingly few moving parts — only 4, in fact. This means that there are fewer components to fail and need repairs as time goes on.
The achievement is possible because of Intergas’s proprietary 2-in-1 heat exchanger (typically, condensing boilers have 2 heat exchangers). Thanks to their unique heat exchanger, Intergas boilers don’t need a diverter valve, valve motor, auto air vent, or a secondary hot water plate heat exchanger.
Intergas has a range of boilers of varying sizes, from 20 to 36kW. Its most recent addition to the range, the Xtreme, is a sleek, user-friendly model that features a flue gas heat recovery unit, which pushes the boiler’s high efficiency even farther than what most condensing boilers can achieve.
The company’s other models include the Xclusive, Eco RF Smart Boiler, and the Rapid series — all of which come with parts and labour warranties spanning between 3 and 10 years.
Note that Intergas boilers are also 90% recyclable at the end of their lifecycle, offering a great chance to slash your carbon footprint.
Despite being a relative newcomer to the UK market, Intergas boilers aren’t the most affordable. In fact, they’re right up there with top brands like Worcester Bosch and Viessmann.
Depending on the boiler model and the size, you can get one installed for anywhere between £2,000-£3,800.
10. Vokera Boilers
Wrapping up our list of the best boiler brands is Vokera — a simple, affordable choice from a company that specialises in home heating and sustainable power generation.
While it still lacks the acclaim of boiler brands like Worcester, Viessmann, and even Glow Worm, Vokera boasts that its boilers are 99% reliable in the first 2 years post-installation.
The company’s warranties range between 5 and 10 years, however, so you know that the company is reasonably confident in their product.
Vokera’s range includes a series of combi and systems boilers with varying capacities. The most advanced of these is the ‘evolve C’ model, which has 5 output options, between 24 and 42kW.
evolve C comes equipped with a BeSmart internet-connected thermostat and supports OpenTherm — a communication protocol that allows you to modulate the heat output from the thermostat controls. Thanks to this vital feature, evolve C can operate at high efficiency and help conserve significant amounts of energy.
The great thing about Vokera boilers is that they’re modestly priced. Together with installation, you can expect one of these boilers to set you back somewhere between £1,200 and £2,100. Considering its impressive reliability numbers and long warranties, that’s quite a deal.
What kind of fuel does your boiler use?
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What Are The Best Oil Boiler Brands?
Not all boiler makers will produce oil boilers. One of the reasons could be the fact that they are more expensive than gas boilers.
Fort those in the market for an oil fuelled boiler, these are the best brands to keep note of
- Worcester Bosch
Boiler Brands FAQs
Below, we’ll answer some questions we often hear about boiler brands available in the UK.
What are the best boilers in the UK?
Worcester, Viessmann, Vailant, Ideal, and Baxi are arguably the best boiler brands available on the UK market. If you’re looking for a new boiler, you can’t go wrong with getting a unit from one of these brands.
That said, every property is unique, so depending on your circumstances, one of the brands above may be better-suited than others. That’s why it’s always best to get professional advice, whether it’s from an installer like Heatable, or a local Gas Safe heating engineer, when you choose a brand for your boiler replacement.
Is a Worcester boiler any good?
Yes — boilers made by Worcester are some of the best in the UK. They’re reliable, durable, quiet, and energy efficient, and come packed with an array of useful features. That said, Worcester’s boiler prices tend to be on the higher end of the range.
What is the life expectancy of a boiler?
Modern boilers from top brands — like the ones we listed above — should serve you well for about 15 years. Of course, a lot depends on the individual model, as even the best brands out there have budget, lower-quality models.
A good way to tell how long a boiler should last is to look at the warranty on offer. If the standard warranty is only 2 years, then the manufacturer probably expects their boiler to start developing faults after the 2-year period. Conversely, if the boiler is covered by a 10-year warranty, you should expect few, if any, repairs for at least a decade after boiler installation.
Note that frequent boiler service and maintenance can prolong a boiler’s life expectancy.
Are new gas boilers more efficient?
Yes, new, condensing gas boilers are far more efficient than their older, non-condensing predecessors. Thanks to the condensing process, which captures latent heat from the boiler’s exhaust gases, new boilers have an efficiency of 90% and up whilst some older models could be only 60-70% efficient.