Passive House low-energy design has finally come to Canada. Started about 25 years ago in Germany, Passive House is a way of designing buildings that are airtight, limit thermal bridging, and take advantage of high levels of insulation. As a result, the mechanical systems are re-imagined to be more about fresh air than heating or cooling needs. This session will include the stories behind three different multi-residential affordable housing projects in Ontario — all currently under construction. These projects have highlighted the significant challenges faced by design teams, constructors, and owners in creating low-energy/net-zero projects. The goal is to demystify Passive House and show what is needed to make this type of construction become the norm in Canada.