Ariston boilers review

Ariston is a more budget-focused boiler brand. But while its boilers are cheap to buy, consumers need to know if they're reliable too – otherwise, they'll cost more on engineer callouts and repairs.

We've revealed the customer scores of gas boiler brands to Which? subscribers and non-subscribers alike, and Ariston has one of the best rates of owner satisfaction at 76%.

But this is only 20% of our brand score. To be a Best Buy, it's crucial for a brand to have a good record of reliability plus engineer approval. 

Which? members can read our full analysis to find out whether an Ariston boiler is a budget Best Buy.

Only Which? members can access the full results of our survey. Log in now or join Which? for complete access.

Ariston gas boiler score

90% of Ariston gas boilers owners are satisfied with their boiler, a truly impressive score. It's the joint-third highest brand for customer satisfaction (matched by Glow Worm and beaten by Sime and Worcester Bosch).

This is three percentage points above the average satisfaction score of 87%, so Ariston's an industry-beating boiler brand when it comes to happy customers.

But this is only 20% of the story. We survey boiler engineers to find out what they think of the brand – and include the results of our reliability study to complete the whole picture.

Find out the full results by subscribing to Which?.

Ariston engineers' score

We heard from 198 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 Ariston gas boilers on all of these tests by logging in, while others can sign-up to Which? to unlock our full analysis.

Ariston gas 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 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.

Join Which? for all the results.

Where to buy Ariston 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 a qualified heating engineer 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 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 Ariston 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.