Latent Load Calculator
Calculates a peak/design latent load, dehumidification load, for the purpose of sizing dehumidification equipment. The calculation is in accordance with the ASHRAE Handbook of Fundamentals.
Airtightness Pressure Conversion Calculator
Phius allows airtightness testing at either 50Pa or 75Pa. The current software used for certification only accepts inputs at 50Pa. This resource allows projects to convert between 50Pa and 75Pa airtightness results.
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.
HRV/ERV Outside Calculator
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)
Phius Frame U-Value Estimator
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.
Phius Window Comfort & Condensation Risk Assessment
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.
Inflation Reduction Act Savings Calculator
Calculate how much money you can save on your project with the Rewiring America savings calculator.
Polsinelli Green Tax Incentive Compendium
Find the federal and state tax incentives for which your project is eligible.
Phius Certification Guidebook 2021 v3.2
The Phius Certification Guidebook is the one-stop-shop for all things related to the Phius project certification program.