Heatline boilers review

Our latest boiler survey reveals what customers and engineers think about gas boiler brand, Heatline.

Heatline has a 66% score for customer satisfaction. This only represents 20% of the overall score. Which? members can also find out whether engineers think as highly of Heatline gas boilers as some customers, and what the real fault rate of these boilers is. 

Sign up to Which? for access to our full results and find out how Heatline gas boilers stack up against competition such as Baxi, Ideal, Vaillant and Viessmann. 

Heatline gas boiler score

Heatline's customer score of 66% from our survey of owners is revealed, but only Which? members can see engineer assessment and details, including Which?’s verdict.

Sign up to Which? for access to our full results and find out how Heatline gas boilers stack up against the competition.

Heatline engineers' review

We asked 198 expert engineers to score gas boiler brands on:

• The ease of sourcing spare parts 
• How easy it is 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 the manufacturer provided
• Whether or not engineers would recommend the brand to consumers (we filter out incentivised and brand-affiliated engineers).

We aggregate all 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 Heatline gas boilers on all these tests by logging in, while others can sign-up to Which? to unlock our full analysis.

Heatline boiler reliability

We 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.

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

Where to buy Heatline 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 Heatline 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