square feet of Phius pre- and fully certified projects
Phius Milestones: Driving Next-Generation Passive Building Standards
In 2007, architect Katrin Klingenberg and builder Mike Kernagis cofounded Phius (Passive House Institute US) to train consultants and certify projects on our climate-tailored passive building standard. Today, Phius is the leading passive building standard in North America, and the Phius Standard is applicable globally. We certify the most passive house projects in North America and put passive at the forefront of the zero-energy movement.