The OPTi H2020 project has a F2F meeting in Stuttgart, Germany on December 8-10, 2015. OPTi aims to contribute to next-generation district heating and cooling systems with a user-centric design. Some of current highlights are: Passed Milestone 1 – Analyse, the design of a concept for consumer interaction and the first prototypes developed by the project. Regarding the cross-cutting theme of gender mainstreaming, a gender perspective has been integrated in six deliverables since the project start in March. The meeting also provides feedback on the first prototype of the GENOVATE Gender and Diversity Toolkit which is one the GENOVATE deliverables.