The Passive House framework and Passive House models have the potential to help buildings achieve their climate goals across the construction sector. For this potential to be realized at a meaningful scale, Passive House professionals need to improve our project delivery practices as well as our modeling tools. Ed May (Partner in the consulting firm bldgtyp, an architecture and consulting firm based in Brooklyn, NY) joins Next Up with an in-depth look at the challenges facing Passive House modelers and discusses the specific traits and values that a new, modern generation of Passive House tools need in order to deliver on the promise of Passive House.