Resource Library

This blog defines Phius' guidelines for the performance verification of constant air volume devices on projects pursuing Phius Certification.

This calculator can be used to determine psi-values for 2-D thermal bridges in combination with THERM.

This edition of the Phius Project Spotlight Series highlights the J.J. Carroll House senior living facility in Boston, Massachusetts.

Phius Certification Manager Al Mitchell dives into the new and improved CERV calculator to aid in Phius Certification.

This edition of the Phius Project Spotlight Series highlights Evanston's First Passive House, a single-family project in Evanston, Illinois.

Phius Building Certification Associate Zoe Rader fields project questions.

Repurposed from a white paper produced by members of the Bright Power team, this blog examines the updates made for the 2024 Phius standard.

This is a "performance criteria" protocol for assessing moisture risk in opaque assemblies. It is referred to as a compliance path in the Certification Guidebook, section B-1. The current version mainly pertains to WUFI Pro.

This edition of the Phius Project Spotlight Series highlights the Yannell Passive House retrofit project in Chicago.

A checklist of tasks for Phius quality assurance professionals to use in the field. This checklist must be used for Phius 2024 projects and all projects with a contract date after September 1, 2025.