Boiler reviews: Owners' views
Boilers owners' views
Every year we survey thousands of Which? members about their home appliances to find out which brands they are most happy with. This year, we've compiled the views of more than 5,000 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 88% of the Which? members in our survey.
Brands of gas boiler including Glow-worm, Worcester, Grant and Ideal are all featured in our survey.
The most popular brand of gas boiler achieves a customer score of 79%, while the least popular brand scores just 52%.
Which? members can log in to find out which three brands emerged triumphant 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.
| Gas boilers Which? customer score | |
|---|---|
| Boiler | Score |
| Alpha |  |
| Baxi | |
| British Gas | |
| Glow-worm | |
| Ideal | |
| Potterton | |
| Vaillant | |
| Viessman | |
| Worcester | |
Table notes
The average customer score is 71%, based on responses from 1,706 condensing gas boiler owners who have bought a boiler since April 2005.
Responses for each brand are: Alpha (32); Baxi (136); British Gas (100); Glow-worm (167); Ideal (99); Potterton (100); Vaillant (304), (Viessman 38); Worcester (575).
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 out which three brands emerged triumphant 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 70%, based on responses from 331 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 (137); Worcester (120).
Our research
In May and June 2011 we surveyed 5,758 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.
More on boilers...
- Find out how we test for our boiler reviews
- Read our full guide to the best boiler buys
- Check out our boiler service investigation results
