These projects aim to make passive design accessible and cost-effective for spec homes for income-qualified buyers. Homes employ SIP construction, triple pane windows, extreme air sealing, a shallow frost protected foundation, and all-electric highly efficient mechanical systems. 1. See Phius design certified homes at various stages of construction completion 2. Hear about the challenges and benefits of Phius certification for single family affordable projects 3. Get a glimpse of how the team is planning to tweak the design for the next round of construction, including moving to Phius prescriptive path