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    Phius CORE Prescriptive Path Workshop | June 2025
    Find out how to get your next single-family project Phius Certified without an energy model!
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Resource Library

Resource Type
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Showing 1– 10 of  41  results
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Calculator/Tool

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.

May 21, 2025
Calculator/Tool

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.

April 25, 2025
Calculator/Tool

Phius Brand Guide

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

March 13, 2025
Calculator/Tool

Phius Performance Criteria Calculator Archive

Find past versions of the Phius Performance Criteria calculator.

January 17, 2025
Calculator/Tool

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.

November 25, 2024
Calculator/Tool

Phius Minotair Calculator

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

October 2, 2024
Calculator/Tool

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.

October 1, 2024
Calculator/Tool

Phius Certification Guidebook 2024

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

September 24, 2024
Calculator/Tool

Phius Certification Guidebook Archive

Review past versions of the Phius Certification Guidebook.

September 3, 2024
Calculator/Tool

Phius 2024 Performance Criteria Calculator

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

August 27, 2024
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