The best boiler brands on the market

05 May 2023

When looking for a new boiler a big question to consider is, what is the best boiler brand and why? There are so many recognised brand names within the heating industry and a lot of engineers will have their personal preferences. You’re likely to have heard of big-name brands such as Worcester and Vaillant but have you ever considered why they are the most popular brands, and if there may be other brands that can compete with the industry leaders?

In this blog, we will discuss a range of boiler brands and break down what makes them popular, from Which? Awards to reputation, let us help you decide the best boiler brand for you.

A new boiler is a big investment, ensuring you chose the right brand that offers maximum value for money, reliability and longevity is key. Before diving into each brand, we have summarized the top 6 things to initially consider.

  • Warranty period provided by your chosen brand.
  • Overall reputation – look at the reviews for the brand and specific boiler models.
  • Does this brand/boiler model have any awards, Which? Best buy for example.
  • How good is the brand’s customer service, and what level of service do they offer?
  • What is the price range?
  • Do the boilers have high-efficiency ratings?

Worcester Bosch Boilers

Let’s kick off the boiler brands with probably the most recognised brand in the industry Worcester Bosch.

Worcester Bosch has a long history of being one of the most trusted and best-selling boiler brands on the market, but why are they so popular and what makes them the nation’s most recognised and respected brand?

In 2022, Worcester Bosch received their 13th consecutive Which? Best Buy award for their gas combi boilers. The Which? Best Buy is a quality assurance for consumers who are looking for a new heating system, among other big-ticket household items. Out of the 9,000 products and services Which? reviews every year, it only endorses the market’s top-rated products. Worcester has also previously been awarded a Royal Warrant for supplying boilers to Her Majesty the Queen’s Sandringham Estate.

It's no wonder with royal recognition and Which? Best Buy awards that Worcester would be at the forefront of consumers’ minds, but what do previous customers think of Worcester and would they recommend the brand? With 5-star-tier ratings across three categories, Worcester’s gas boiler received an 84% recommendation rating, the strongest of any boiler on the market. *


Worcester Bosch boilers offer a high-efficiency rating of 94%**and 10-year warranties. What can we say other than they do tick off a lot of the things we suggest considering when choosing the best boiler brand.

Viessman Boilers

Next on the list to consider is Viessmann a German manufacturer dominating the European market and breaking its way into the UK market in recent years. Renowned for its simple crisp designs, reliability, and reputation nationwide.

Alike Worcester, they have been awarded Which? Best Buy Awards, on 7 of their models to be precise. With their most recent award being the Which? Best Buy Gas Combi Boiler 2022.

Viessmann has a 4 out of 5 star rating on Trustpilot and is a trusted brand by both installers and homeowners.. Viessmann are another highly reliable brand we recommend considering when choosing the best boiler brand.

Vaillant Boilers

The Vaillant Group is an international family-owned company and it is the second largest European manufacturer in the sector. The company develops and manufactures its products across the United Kingdom, as well as Germany, France, Spain, Italy, Slovakia, Turkey and China.

As one of the world’s leading manufacturers of environment-friendly heating and air-conditioning technology, sustainability plays an integral role in the Vaillant Group’s activities.

In 2020, Vaillant’s entire range of domestic boilers was named the top-rated gas boiler brand in the UK after being awarded ‘Best Buy’ status by Which?*** In an independent survey carried out by Which? 7,500 customers were asked if they would recommend Vaillant. The report saw Vaillant named as one of only two brands awarded Best Buy status, scoring strongly amongst consumers for reliability and customer satisfaction.

Vaillant also scored highly with engineers, with one engineer commenting “Vaillant is one of the top brands on the market and that’s clear when you look inside these boilers. The configuration of parts is well thought out for the engineer when repairing or replacing parts. It’s a very reliable boiler brand with a very good guarantee.” ***

With customers and engineers providing reviews like the above, what more could you want? Well, it doesn’t end there, Vaillant offers a 5-year warranty and great efficiency ratings. They have even gained a Quiet Mark certification on a range of their boilers. Quiet mark assesses the declared sound measurements of approximately 400 boilers every year. Only the quietest 20% of any heating subcategory are eligible for the Quiet Mark certification. Currently, 29 Vaillant boilers have qualified for the Quiet Mark certification, if you’re looking for a quiet, reliable, and trusted boiler then Vaillant is a perfect choice. It’s clear that this brand is a contender for the best boiler brand on the market.

Ideal Boilers

Ideal boilers are known for their innovative approach to providing cost-effective heating systems to homeowners. Similarly to Vaillant they have gained the Quiet Mark certification on one of their boilers the Ideal Logic C30 combi boiler. In previous years they have gained The Queen’s Award for Enterprise, Good Housekeeping Reader Recommended and Product of the Year for their Logic + and Vogue range of boilers.

Ideal gas condensing boilers are incredibly efficient. The entire Logic range is between 91-94% efficient with an ErP rating of A****. What’s more they offer warranties from 2 years to a generous 12 years.

Need more help choosing your boiler?

Swale Heating have many years of experience installing and repairing boilers in 125,000 homes across the South East, London and East Anglia. Our engineers are Gas Safe and MCS certified. Use our online form for an instant quote and to book a representative to visit your property or give us a call on 0800 731 3344 to speak to one of our specialist advisors.

If you’d like to spread the cost of your boiler, you can opt for a finance plan to allow you to invest in your new boiler. We offer a variety of plans that you can read more about here.If you’ve decided on your boiler brand but need some help understanding the size of the boiler you require, or the type of boiler you need then we have a range of handy guides available on our website.

We recommend our ‘What size boiler do I need?’ guide, which includes information on how to measure up for a boiler and the best location for your boiler installation. We also suggest reading our ‘Different types of boilers, and what one is best for you’ guide, which breaks down the various types of boilers.


Information sources:

*Worcester Bosch

**Eon Energy

*** Vaillant