Learn all about the two paths to Phius certification for single-family projects.
Phius CORE and Phius ZERO are two of the most energy efficient building standards in the country, which means your single-family home is designed to exceed your quality and energy savings goals.
Phius is a pass/fail passive building standard. For the CORE and ZERO options, it remains a “performance-based” energy standard that also includes prescriptive quality assurance requirements adopted from various U.S. government programs.
