This one-day event organized by CROAIF at the Maison de l’Architecture was a valuable opportunity to discuss the challenges of renovation, with the spotlight on energy efficiency, ecology and architectural quality. We shared the 11-year experience of our « Rénopassive » project in Magny Les Hameaux (78). What’s particularly gratifying is the satisfaction of the residents, their comfort in summer and winter, and all this with lower-than-expected energy consumption.