The overall aim of the THERMOS project was to provide the methods, data, and tools to enable more sophisticated thermal energy system planning rapidly and cost-effectively.

THERMOS aimed to accelerate the development of new low-carbon heating and cooling systems across Europe and enable the faster upgrade, refurbishment, and expansion of existing systems.

To this end, THERMOS:

• Developed a state-of-the-art modeling methodology for address-level energy system maps.
• Used this methodology to produce a set of these maps for the pilot cities involved in the project.
• Created modeling algorithms for analyzing these maps to support planners in decision-making.
• Tested these methodologies in four replication cities.
• Developed and published free, open-source software for use by local authorities or other interested parties.

THERMOS worked with eight cities that were paired as pilot and replication cities. Pilot cities were selected to participate in. THERMOS due to their extensive experience in planning district heating networks. Their in-depth knowledge of the challenges faced by thermal network planners helped develop software that reflected real-world experiences, providing insights into best practices and how they could be replicated in their selected replication cities.