Biasi boilers review

Biasi has sold combi, regular and system boilers in the UK market since the 1990s, and it mainly sells budget and mid-level boilers.

It's a fairly small brand in the UK. In our latest survey, only 2% of people with a gas boiler owned a Biasi model, but they give them a four-star rating, with a 68% customer score.

However, this is only 20% of our total brand score, because it's crucial for a brand to have a good record of reliability, plus engineer approval to be a Best Buy. Which? members are able to see the engineers' scores and the fault rate of Biasi boilers to see if this lesser-known brand is actually a hidden gem.

Sign up for access to the full results.

Biasi gas boiler score

Biasi's customer score is lower than most boiler brands and it ranks among the worst. While the brand doesn't have terrible satisfaction rates, boiler owners aren't as happy as the average.

We found that 68% of Biasi boiler owners are satsified, so we've still given the brand a respectable three-star score. This is three percentage points below the average rate of satisfaction.

Biasi has the joint-worst dissatisfaction rate among gas boiler brands at 10% of customers regretting their purchase, which ties it with Intergas and Vokera. 

The rest are neither satisfied nor dissatisfied. While it's common across all brands for a segment of customers to be neutral about their purchase, Biasi customers tend to be more assured about their opinion.

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?.

Biasi engineers' scores

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 Biasi gas boilers on all of these tests by logging in, while others can sign up to Which? to unlock our full analysis.

Biasi 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 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.

Sign up to Which? for all the results.

Where to buy Biasi 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. Before you go ahead, it's worth getting advice from an expert who can assess your current heating system 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 Biasi 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.