Boiler reviews: Owners' views
Every year we survey thousands of Which? members about their home appliances to find out which brands they're happiest with. This year, we've compiled the views of more than 11,000 Which? members to show you the boiler brands which have left owners the most - and least - satisfied.
Gas boilers owners' views
Our table below reveals customer satisfaction scores for a host of brands - covering those owned by 90% of the Which? members in our survey. Brands of gas boiler including Glow-worm, Worcester, Grant and Ideal are all featured in our rankings.
The most approved brand of gas boiler achieves a customer score of 83%, while the least pleasing brand scores just 44%. Which? members can log in to find out which two brands emerged triumphant in the table below. If you're not already a member, you can sign up for a £1 trial to try full Which? access instantly.
| Gas boilers Which? customer score | |
|---|---|
| Boiler | Score |
| Alpha |  |
| Ariston | |
| Baxi | |
| British Gas | |
| Ferroli | |
| Glow-worm | |
| Halstead | |
| Ideal | |
| Main | |
| Potterton | |
| Vaillant | |
| Viessmann | |
| Vokera | |
| Worcester | |
Table notes
The average customer score is 74%, based on responses from 4,501 condensing gas boiler owners who have bought a boiler since April 2005.
Responses for each brand are: Alpha (85); Ariston (30); Baxi (352); British Gas (253); Ferroli (38); Glow-worm (396); Halstead (35); Ideal (224); Potterton (246); Vaillant (792), Viessman (98); Worcester (1617).
Oil boilers owners' views
Our customer score table reveals their satisfaction with the brands of oil boiler owned by 66% of the Which? members in our survey.
Which? members can log in to find how the brands compare in the table below. If you're not already a member, you can sign up to try out full access for one month, for just £1.
| Oil boilers Which? customer score | |
|---|---|
| Boiler | Score |
| Grant | |
| Worcester | |
Table notes
The average customer score is 74%, based on responses from 369 owners of condensing oil boilers, who have bought their boiler since April 2005.
Responses for each brand that we have enough responses to report on are: Grant (131); Worcester (135).
Our research
In May 2012 we surveyed 11,254 Which? Connect online panel members about their main gas or oil central-heating boiler.
The Which? customer score shown in the table is a combination of owners' satisfaction with their boiler brand and how likely they'd be to recommend it to a friend.
- Find out how we test for our boiler reviews
- Read our full guide to the best boiler buys
- Discover the most reliable boiler brands
