Efficacity

Efficacity is a French research and development institute dedicated to accelerating the energy transition in cities and urban areas. Founded as a collaborative venture between academic institutions, industry partners, and public authorities, Efficacity focuses on developing practical tools, methodologies, and technologies that help cities design, build, and operate more energy-efficient urban systems. The institute's research covers the full spectrum of urban energy challenges, from building energy performance and district heating networks to urban mobility energy consumption and the integration of renewable energy sources into city grids. Efficacity's interdisciplinary approach combines expertise in engineering, urban planning, data science, and social sciences to deliver holistic solutions that account for both technical and human dimensions of the energy transition. The institute has developed several influential decision-support tools used by French cities and developers to model energy performance at the neighbourhood and district scale, enabling more informed choices about building design, energy supply, and transport infrastructure. Efficacity's work has been particularly influential in shaping France's approach to positive-energy districts and low-carbon urban development.