How to decarbonise buildings? That’s an important topic because that sector accounts for 37% of all emissions, making it one of the three pillars of decarbonisation next to electricity generation and transportation. Progress has been mixed. If lighting is an incredible success, heating and cooling remain a complex proposition with certain countries adopting new technologies much faster than others. Energy efficiency is sometimes a hard sell, as pay back periods can be counted in decades. Energy efficiency can be active, passive, “behind the meter” or at system’s level.  Laurent and Gerard wander though that landscape with Vincent Petit, who runs Schneider Electric Sustainability Research Institute. Vincent has overseen the company’s prospective on the Climate and Energy Transition since 2017. Digital and behind the meter (solar, batteries) open new horizons even if regulators get confused between sticks and carrots. Furthermore, the famous “Jevons Paradox” seems to indicate that energy efficiency gains trigger a rise in energy consumption. We discuss options to decarbonise buildings, a long and winding road, but nevertheless critical to solving climate change. We debate about the value of sticks and carrots and the efficiency of public policy support. Is there a winning formula? We thank Amundi for supporting the show Transcripts available here: https://www.spreaker.com/podcast/redefining-energy--3170008