EUROCHAMP-2020 aims at further integrating the most advanced European atmospheric simulation chambers into a world-class infrastructure for research and innovation. The project is composed by a coordinated set of networking activities, which deliver improved chamber operability across the infrastructure, as well as standard protocols for data generation and analysis. Trans-national access is provided to sixteen different chambers and four calibration centres, becoming the core of the project. Joint research activities enhance the capability of the infrastructure to provide improved services for users. Cooperation with the private sector a fundamental pillar of the project, and it is necessary to exploit the innovation potential of the infrastructure by supporting development of scientific instruments, sensor technologies and de-polluting materials. Overall, EUROCHAMP-2020 has the goal to significantly enhance the capacity for exploring atmospheric processes and ensure that Europe retains its place in atmospheric simulation chamber research.