Which? reveals the most reliable boiler brandsOur research uncovers 2014's best boiler brand

11 September 2014

Boiler controls close-up

We've uncovered the best boiler brands that remain fault-free for longer

Buying and installing a brand-new boiler can easily set you back £2,500, so it’s an investment that it pays to get right first time - especially as new Which? research has revealed that the the average cost of a callout and repair is now £188.

The high cost of boilers and repairs is the reason why every year we survey thousands of owners about their boiler and the faults it has encountered. We use this information to calculate unique reliability and satisfaction scores for all the main gas and oil boiler brands. 

The results of our 2014 boiler owner survey are now in, and one brand has streaked ahead of the pack to earn our coveted Best Buy recommendation. 

Which? members can log-in now to read reviews of the best boiler brands, as well as find out which are the least reliable boiler brands that may be best avoided. If you're not already a Which? member, you can get instant access to all our reviews with a £1 one-month trial

Best and worst boiler brands

Our boiler survey captures information from owners about everything from the type and brand of boiler that they own to how often, if it all, it has broken down and how much it cost to repair. 

More than 10,000 boiler owners took part, and as a result we had enough responses in our survey this year to provide robust reliability ratings for eleven gas and two oil boiler manufacturers including Worcester, Baxi, Potterton and Vaillant.

Boiler breakdowns

Boilers get put through an awful lot. Even in a moderately busy household a boiler could be expected to instantly heat up gallons of water to 80 degrees three or four times a day. 

With such a heavy workload, they do inevitably break down from time to time and our survey reveals that the average cost of a repair is £188.

Almost half of gas and oil boilers will develop at least one fault that needs a repair within the first six years of its life. Get yourself a Which? Best Buy boiler and this drops to fewer than two in five. 

Despite the likelihood that your boiler will eventually develop some faults that need fixing, our survey reveals that 93% of people who own a boiler would be £50 or more better off without even the cheapest boiler cover contract. 

Though the value for money that they therefore offer is questionable, many people like the peace of mind that a boiler cover contract provides. If that sounds like you, read our boiler cover provider reviews to see what different policies do and don't offer, and which brands have the most satisfied customers. 

More on this...

  • Tips on choosing the best boiler
  • See how the major boiler brands compare
  • and for more information on how we assess boilers