Baxi boilers review

Baxi is a BDR Thermea brand, alongside Potterton and Main. Headquartered in Warwick, it's one of the biggest boiler manufacturers in Europe, so it offers a lot of choice.  

Our survey data shows that people with Baxi boilers have high rates of satisfaction, resulting in a four-star customer score. But that's only worth 20% of the complete score.

We've also found out whether engineers think as highly of Baxi gas boilers as customers do, and the real fault rate of these boilers. 

Only Which? members can access our full results. Log in now or join Which? to discover the best boiler brands and how Baxi boilers stack up against the competition.

Baxi gas boiler score

Baxi boiler owners have high rates of satisfaction: 84% are satisfied with their boiler; 38% of all owners describe themselves as 'very satisfied'. 

It gets a customer score of four stars out of five. 

However, this represents only 20% of the complete score. Good reports from engineers and a strong reliability record are also vital before a brand can become a Best Buy.

Join Which? to find out whether Baxi makes the grade.

Baxi boilers engineers' review

Baxi boilers engineers' review

Only Which? members can see engineers' reviews of Baxi boilers.

We heard from 230 expert engineers who scored boiler brands on several tests. We asked them to score gas boiler brands on the following:

• The ease of sourcing spare parts 
• How easy it so to change a common component (a heat exchanger)
• The ease of servicing the brand's boilers
• The build quality of the brand's boilers
• The quality of technical support provided by the manufacturer
• Whether or not engineers would recommend the brand to consumers (we filter out incentivised and brand affiliated engineers).

We aggregate all of these scores and use them to create our 'overall engineers' score', which is 40% of our total brand score.

Which? members can see how engineers rated Baxi gas boilers on all of these tests by logging in, or sign up to Which? to unlock our full analysis.

Baxi boiler reliability

Boilers are major purchases you should only make once every 10 to 20 years. You can keep yours for longer if you get it regularly serviced and if you get faults fixed quickly.

We've asked people who bought a boiler in the past six years about whether it's fault-free. When faults are reported, we measure how serious the fault was, how long it took for the first fault to happen, and we make sure it was fixed by an engineer.

Using this data, Which? members can see which brands produce boilers that are less prone to fault than others.

Log in now or join Which? for the complete picture.

Where to buy Baxi boilers

It's easy to rush into making a decision, especially if your boiler breaks down in winter, but we recommend getting a couple of quotes from qualified heating engineers and comparing costs. Our Trusted Trader service can link you up with vetted boiler installers in your area.  

You could also buy a boiler yourself and hire an installer, though make sure you seek expert advice before doing so, to have your current heating system assessed and identify the type of boiler that meets your specific needs. 

If you buy a boiler without having an installer lined up, you could find yourself struggling to find someone willing to set it up for you. An installer may have access to trade or wholesale prices, and they will be able to recommend a model based on a holistic assessment of your home and heating system.

Only a Gas Safe registered engineer/installer can install a new boiler: it's both dangerous and illegal to do so yourself if you're not qualified.  

Where to buy a boiler – find out what your options are

Are Baxi boilers efficient?

New boilers must be A-rated, but how efficiently your boiler works in practice depends on several factors, including how you use it and how well it's installed. Use a Which? Trusted Trader for your boiler installation and regular maintenance.

Visit Baxi to find out more about Baxi boilers.