Phius Non-Res Effective DHW Usage Calculator
WUFI Passive takes a conservative approach to DHW modeling for non-residential projects. Phius has developed this tool to estimate the effective DHW modeling inputs for non-res projects using WUFI or METr.
HRV/ERV Outside Calculator v25.1.0
This calculator should be used to determine the 'Mechanical Room' temperature when a mechanical ventilation device is located outside of the thermal envelope. (eg. the roof) This version includes the ability to input custom climate data.

Phius Brand Guide
The Phius Brand Guide offers guidelines on logo usage, important terminology, visual style and much more.

Phius Performance Criteria Calculator Archive
Find past versions of the Phius Performance Criteria calculator.
Phius Certification Program Version Eligibility Dates
The Phius Certification project contract date determines the required program version. Generally, projects can voluntary choose to comply with a newer version than required by contract date.

Phius Minotair Calculator
Resources for modeling the performance of the PentaCare V12 MINOTAIR system for Phius projects.

Phius Temperature Reduction Factor & Auxiliary Space Heating Estimator
This estimator may be used to determine a lower temperature reduction factor than the default of 0.95 and the associated additional energy use for attached zones outside of the thermal and airtight envelope that are conditioned to a lower setpoint temperature than the certified portion of the building.

Phius Certification Guidebook 2024
The Phius Certification Guidebook is the one-stop-shop for all things related to the Phius project certification program.

Phius Certification Guidebook Archive
Review past versions of the Phius Certification Guidebook.

Phius 2024 Performance Criteria Calculator
This calculator is used to determine project-specific performance criteria for Phius 2024 Certification.