The MOOC aims to give an overview and the knowledge for the implementation of the eco-design in every product or system design in the context of the energy transition. In particular, using a case based approach, and tools’ analysis, the course will start with the basic and core legislation then moving to the economics and working principle and methodologies used for implementing eco-design and energy efficient design. After examples of energy and environmental performance indicators calculations and presentation of different approaches and case studies, the implementation in every potential product or system is presented and discussed, under the context of smart, affordable and sustainable energy context.