Vaillant named Which? recommended brand for gas boilers
We’re delighted to share that Vaillant has topped the table for Which? recommended brand for gas boilers.

It shows that when homeowners, engineers and independent experts look at the best in heating, Vaillant stands above the rest!
The Which? endorsement is a notable achievement in the heating sector, as it reflects an independent assessment of product performance based on rigorous criteria. Which? evaluates brands on key factors that matter most to homeowners, including reliability, engineer recommendations, and customer satisfaction.
Vaillant is top scoring in Which? research, achieving 5 stars in the following categories:
- Reliability
- Engineer recommendation
- Ease of sourcing parts
- Ease of replacing a common component
- Ease of servicing
- Support for installers
- Build quality
- Overall engineer score
Which? asked heating engineers to gauge their thoughts on each manufacturer, including how well the boilers are built, how easy they are to repair, service, and the availability of spare parts.
225 expert heating engineers what their thoughts of Vaillant combi, system and heat-only gas boilers, with positive feedback including simple to repair, straightforward to service, and high quality.
Which? also surveyed homeowners asking how satisfied they are with their current appliance and whether they’ve suffered any faults or breakdowns.
The Which? endorsement provides reassurance to homeowners seeking dependable gas boiler solutions. It confirms that Vaillant’s products are designed with quality craftsmanship, tested for longevity, and supported by high levels of customer satisfaction.
The endorsement reflects Vaillant’s ongoing commitment to innovation, industry-leading standards, and customer care.
James Fowler, Marketing, Strategy & Transformation Director at Vaillant, comments: “We are delighted to have not only topped the gas boiler chart this year but to also have secured the Recommended Brand status across the range. Such independent scrutiny is important for heating engineers and consumers to help them make informed decisions as they work with or invest in a new gas boiler.
“Vaillant is continually listening to heating professionals to take on board views and feedback. It is great to see that areas such as ease of install, our high-quality components and spare part availability have been strongly recognised by the trade. And the extremely low level of faults also reported by consumers is testimony to the design and build quality and long-term performance of Vaillant’s gas boiler range.”