Resource Library

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.

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 tool can be used for building compliance modeling for Phius Project Certification to estimate component-level performance data for fenestration systems that are rated by the National Fenestration Rating Council (NFRC). Be sure to read the 'Start Here' tab and if component-level performance data is already available for your product, you won't need this tool.

The window comfort and condensation risk criterion applies to all projects, regardless of size. Use the calculator below to determine the requirements to ensure comfort and minimize condensation risk for your project.

Calculate how much money you can save on your project with the Rewiring America savings calculator.

Find the federal and state tax incentives for which your project is eligible.

Find rebates for which you may be eligible.

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

Use for any project with more than one dwelling unit. This includes townhomes, duplexes, traditional multifamily, dormitories, long stay hotels etc... following the same protocol as the Multifamily Lighting and Miscellaneous Electric Loads (MEL) document.

This document outlines the prerequisites and process of becoming a Phius Certified Rater or Phius Certified Verifier, eligibility to inspect and verify Phius projects, and the responsibilities of the Rater/Verifier in the certification of Phius projects.