BPI News

Saratoga Springs, NY — The Building Performance Institute, Inc. (BPI) has released Version 4.2 of the BPI-2100 Home Performance Related Data Transfer (HPXML Transfer Standard), the industry’s common framework for exchanging home performance data across programs, contractors, and other stakeholders. 

“The release of Version 4.2 underscores BPI’s dedication to maintaining an agile yet rigorous standards process. By aligning with evolving software platforms and harmonizing closely with organizations like National Laboratory of the Rockies (formerly National Renewable Energy Laboratory), we’re ensuring that HPXML continues to deliver accurate, interoperable data transfer capabilities built to support industry advancements that programs and practitioners can rely on,” said Darlene Welch, National Technical Director at BPI. 

Developed through BPI’s ANSI-accredited process, HPXML offers an open, technology-neutral method for consistent data transfer and is widely used to improve accuracy, reduce administrative costs, and enhance operational efficiency. Version 4.2 includes minor updates aligned with Semantic Versioning 2.0, incorporating refinements based on stakeholder feedback and ongoing coordination with the National Laboratory of the Rockies to ensure compatibility with the OpenStudio HPXML Modeling Toolkit. 

HPXML is utilized by leading programs nationwide, including Arizona Public Service, Austin Energy, Efficiency Vermont, NYSERDA, Pacific Gas & Electric, Pearl Certification, PSEG Long Island, Salt River Project, San Diego Gas & Electric, SoCalGas, Southern California Edison, and United Illuminating. 

Version 4.2 is now available for adoption. Additional details can be found at hpxmlonline.com, or by contacting standards@bpi.org.