Which? annual research on gas and oil boilers shows the best and worst boiler brands, according to boiler owners and heating engineers.
Two brands were reliable enough, and received high enough praise from both customers and heating engineers, to get our Best Buy recommendation.
Read on to find out what our surveys uncovered about the best and worst boiler brands.
In May-June 2021 we asked 8,001 members of the public, who bought a boiler in the past six years, to tell us how satisfied they are with their boiler, and if they would recommend it to a friend.
This gives a holistic picture of just how good the UK boiler manufacturer's are - and it's the biggest brands aren't necessarily the best.
Below are all the brands identified in this year's survey, and a typical price range across their models. Find out how they scored by following the links.
The price doesn't include installation costs, such as labour and fittings. Factors such as what price your installer can get a model for may increase or decrease the price you pay, but the typically price on our boiler reviews should give you a good sense of typical costs.
Getting a reliable boiler brand is vital. It will give you piece of mind and save you money in the long run, as you are not having to fork out on expensive repairs. Boiler owners in our survey said they pay, on average, £200 a time for a boiler repair.
To find out how reliable each boiler manufacturer is, we ask owners that have purchased their boiler new in the past six years to tell us whether their boiler has broken down and, if so, how often.
As you can see in the graph below, after six years the worst boiler brand is nearly twice as likely to have developed a fault compared to the most reliable Best Buy brand.
We asked Which? Trusted Trader heating engineers what they thought about each brand, rating a brand on five factors. This generates a boiler brands engineer score.
Some engineers are incentivised by manufacturers to install their boilers, we filter out responses from these engineers. This ensures that the views and ratings from engineers is independent and unbiased. Here is what they had to say about:
We don't just rely on one opinion or source of information to score boiler brands.
We turn all of this data into easy-to-understand star ratings and an overall Which? test score, so you can see at a glance the brands we recommend and the ones you should avoid. We pair this with detailed specification information from every boiler within each brand's range.