Sustainability Report 2025

Changing a heating system is a significant household decision. Cost, installation work and day-to-day performance all matter. Vaillant Group UK’s role is to help homeowners understand the options available, from modern boilers to heat pumps, so they can consider heating solutions that suit their home and how they use it.

As the UK moves towards lower-carbon heating, we are also reducing emissions from our own operations. Achieved performance includes our Belper site operating on 100% renewable electricity from its supplier and an approximately 7% reduction in combined direct operational emissions against our 2019 starting point. In 2025, 30% of the company car fleet was fully electric, compared with 97% petrol or diesel vehicles in 2020.

These results are separate from our 2030 targets. Under SEEDS 2030, our targets are to reduce emissions from our own operations by 50% and emissions linked to product use by 55%.

We recognise that heating choices depend on each home. A heat pump or other lower-carbon option will not automatically reduce bills or suit every property without consideration of the building, system design, usage habits and settings. Product-use emissions remain the largest part of our footprint and increased between 2024 and 2025, so our focus is on providing products and information that support practical, informed decisions.

As heating changes, Vaillant is developing connected heating products and services to help homeowners manage their systems more easily and get better-informed support when it is needed.

In 2025, Vaillant improved its digital platforms using customer feedback, making common actions simpler and systems easier to navigate. Connected appliances also helped identify potential issues remotely, giving service teams better information before a response is arranged.

This can provide reassurance for homeowners, particularly as more households consider lower-carbon heating options such as heat pumps. Remote information can support earlier understanding of an issue, but it does not prevent every problem or remove the need for all site visits.

By the end of 2025, more than 5700 customers were signed up to subscription-based offerings. myVAILLANT connect is compatible with all Vaillant boilers produced since 2005 and most Vaillant heat pumps. remoteGO mini supports installers with remote help and installation checks, reducing the need for a direct Vaillant site visit in some cases.

In 2026, Vaillant plans further improvements for homeowners, including subscription-based offerings for boilers and heat pumps, clearer onboarding and support for heat pump customers, and better guided help for engineers during installation and setup.

These services are intended to support easier management, reassurance and more informed service responses. They should not be read as a guarantee of lower energy use or lower household bills, as real-world outcomes depend on the home, system settings and how heating is used.

For homeowners thinking about future heating choices, it can be useful to see how heating technology is used outside a standard product page. In 2025, Vaillant used its heating expertise to support community organisations in practical ways, including helping organisations access heating and hot water and supporting examples of heat pump technology in real buildings.

Achieved activity in 2025 included donating 11 heating products or systems. Vaillant support also helped restore heating and hot water for 87 YMCA Derbyshire residents. Alongside this, Vaillant supported low carbon heat pump technology at Cromford Mills and supported the installation of a Vaillant aroTHERM plus heat pump at Adrenaline Alley. Employees also contributed 272 volunteering hours during the year.

These examples do not show that every home will have the same requirements or outcomes. Heating choices depend on the building, how it is used and the system design. No quantified energy, carbon or cost savings are reported for these community heat pump projects. Their value is as practical examples of how Vaillant technology and expertise can be applied in everyday settings.

Looking ahead, Vaillant will continue to strengthen how community impact is tracked and reported in 2026. This will help provide clearer information on community activity over time, while keeping reported results separate from future plans.

Read the full report to learn more about Vaillant’s community activity, heating support and real-building heat pump examples.