Multi-fuel boiler concept supports a flexible transition to fossil-free residential heating

A Dutch consortium of Stedin, GasTerra, Intergas, Bekaert and DNV has developed a proof of concept for a multi-fuel boiler for residential heating that automatically adapts to different gas qualities. The concept was launched at DNV's Technology Centre Groningen, the Netherlands, on 18 June.

As the energy system moves towards climate neutrality, electrification will play an important role. At the same time, existing gas infrastructure can continue to provide value by transporting renewable and low-carbon gases. This creates a need for solutions that allow homes and networks to adapt flexibly to different energy carriers.

Today’s domestic heating appliances are generally designed for one uniform gas quality. When gas networks are converted to another gas type, such as hydrogen or blends of gases, appliances often need to be adapted at the same time. This can create logistical complexity, costs, and planning pressure for grid operators, installers, and residents.

The multi-fuel boiler concept addresses this challenge by automatically adjusting to the gas quality available in the network. The first proof of concept can operate on low-calorific natural gas, hydrogen and blends. By separating the timing of boiler installation or replacement from the conversion of the local gas network, the concept can help make the transition to fossil-free heating more manageable and cost effective.

DNV acted as independent innovation partner within the consortium. Its role was to help develop and validate the technical feasibility of the concept, bringing innovation to the point where it has been demonstrated to work. Further development and scaling can be taken forward by manufacturers, technology developers, and other market parties.

The consortium is inviting additional parties to join the next phase and contribute to the further development of the multi-fuel concept. Future versions could be expanded to operate on a wider range of gas types, supporting broader applications in different energy systems worldwide.