Resource Library

Use this estimator to determine specific or total storage loss inputs for domestic hot water storage tanks when no 3rd party rating is provided or when an AHRI standby loss is known.

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.

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.

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

Find past versions of the Phius Performance Criteria calculator.

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.

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

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.

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

Review past versions of the Phius Certification Guidebook.