Boiler brands rated Best and worst gas boiler brands
To find out which are the best and worst boiler brands, we asked more than 10,000 boiler owners about the brand they own, how satisfied they are with it and if their boiler had suffered faults or breakdown.
The results enable us to recommend to you the best and worst brands of boiler both for reliability and overall customer satisfaction - read on for our verdict and recommendations in the tables below.
Best and worst gas boiler brands revealed
There's a big difference between the best customer satisfaction score and the worst; the top-rated boiler manufacturer has a customer satisfaction score of 89%, while the worst gets only 61%. Three brands stand out for having the highest customer satisfaction scores.
To find the best individual model of gas boiler for you, go to our full boiler reviews.
Most and least reliable boiler brands
Below we reveal the most and least reliable boiler brands. Our unique Which? reliability score is based on the proportion of boilers from each brand that have had repairs, adjusted by age to ensure that all brands are compared on an equal basis.
We only rate those brands that we received 30 responses or more about, to ensure we can assess each brand fairly.
How we calculate boiler brand scores
In June 2014 we asked 10,119 people who've had a gas or oil condensing boiler installed since April 2006 about their boiler, using our online consumer panel of Which? members.We asked them to tell us about breakdowns, problems and annoyances with their boiler.
We also asked them to assess how satisfied they were, and how likely they would be to recommend their brand of gas condensing boiler (regardless of their experience of getting the boiler installed). These two questions form the basis of the Which? customer satisfaction score.
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