In Europe, there is a clear long-term objective to decarbonize the energy system, but it is very unclear how this will be achieved in the heating and cooling sector. As a result, there is currently a lot of uncertainty among policymakers and investors in the heating and cooling sector, primarily due to a lack of knowledge about the long-term changes that will need to occur in the coming decades. This HRE project will improve the knowledge in the heating and cooling sector and transfer it to key lead-users across policy, industry, and research. By doing so, it will enable new policies and prepare the ground for new investments in new markets.