Phius provides a significant amount of protocol related to energy modeling for certification compliance and accuracy, as well as supplemental calculators that may be used to support building energy modeling.
Our tools, and specifically our project-specific performance criteria are centered around cost-optimized design. Be sure to check out our tool to estimate up-front cost premium and corresponding energy savings for new construction projects achieving Phius Certification.
Passive building places a high emphasis on the enclosure. Our toolset includes guidelines for moisture design for high performance enclosures, thermal bridge calculation methods, protocols, and calculators, as well as tools to assess for potential mold growth.
From climate-specific heat pump de-ration tools to domestic hot water equipment efficiency and piping distribution network calculators, our resource library covers it all.
Phius' library of calculators, protocols and supportive tools provide resources on detailed subjects as well as general support and tips throughout the design, certification and construction process.
The Certification Guidebook contains an appendix specifically on how to prepare the building for air-tightness testing according to ANSI/RESNET/ICC 380, as well as how to define and account for non-threatening air leakage.
Windows are generally the weakest point in the passive building enclosure. Phius has built tools to set maximum U-value requirements for windows based on comfort, as well as U-value constraints to minimize the risk of condensation on the interior surface of windows.
For multifamily projects pursuing Phius Certification, we have created a specific protocol and corresponding calculator for lighting and internal loads. The download set includes a sample project displaying the two methods supported in this protocol.
