Single-Family Standards

Learn all about the two paths to Phius certification for single-family projects.

Achieving Your Dream Home

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.

The Three Pillars of Phius Certification Standards

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.

Limits on heating/cooling loads (both peak and annual)

Air-tightness and other prescriptive quality assurance requirements

Limit on overall source energy use

Want More Details?

Check out our comprehensive Phius Certification Guidebook to answer any questions you might have.
Phius Guidebook

Phius is here to help

Not sure where to start when it comes to getting your own single-family Phius home built? Take a deep breath, because we are here to help.