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About BPI Standards

BPI is a national standards development organization for residential energy efficiency and weatherization retrofit work. As an independent, not-for-profit organization, we bring together leading building science experts from across North America to develop our standards using a consensus-based process.

On July 13, 2010, BPI was approved by the American National Standards Institute (ANSI) as an Accredited Standards Developer. Through BPI's Standards Technical Committees (STCs), their working groups, and dozens of committed industry participants, the BPI standards program maintains an unmatched reputation as the home performance industry’s leading standards body.

BPI functions as a vital connection between contractors, technicians, training organizations, and programs to ensure the entire home performance and weatherization workforce is following the same strict protocols.

Individuals that have been trained, tested, and certified to BPI’s nationally recognized standards use the house-as-a-system approach to improve the performance of existing homes – an approach proven to reduce homeowner annual utility bills by as much as 20% or more. That's why BPI standards are cited by the Home Performance with ENERGY STAR (HPwES) program from the U.S. Department of Energy (DOE) and Environmental Protection Agency (EPA), as well as several state Weatherization Assistance Programs (WAPs).


Standards Under Review

The Building Performance Institute, Inc. (BPI) is seeking input from the public on BPI 2100, Home Performance Related Data Transfer (the HPXML Transfer Standard). BPI’s Data and Modeling Standards Technical Committee (DM-STC) has approved the release of the draft Version 4.0 for a 45-day public comment period ending on July 22nd, 2024. 

The HPXML Data Transfer Standard, also referred to as a “schema,” follows the Semantic Versioning 2.0 specification to indicate changes and updates. Version numbers follow a pattern of Major, Minor, and Patch (e.g., 2.3.0). When the schema is updated with “breaking changes,” which are changes that make it incompatible with previous versions, the Major version number is increased. Examples of changes that require a major version change include:  
  • Renaming elements,  
  • Removing elements 
  • Moving elements, and  
  • Removing enumerations 
The current draft HPXML standard is considered a major update, moving from Version 3.1 to Version 4.0.  
In addition to the standard, a complete list of breaking and non-breaking changes to the HPXML  
standard can be found here: 
HPXML Version 4 draft: 

(Note: Only the changes under the heading “HPXML v4.0 - Release Candidate 4” are under consideration for public review.)  
To submit comments on HPXML, please download the BPI Standards Comment Form.  
Completed forms must be submitted to by July 22, 2022, for comments to be considered by the DM-STC. 


BPI Standards Development Procedures

BPI-1 Standards Procedures Manual

Appeals Policy

BPI Standards Development Appeals Policy and Filing Fee

Policy Guidelines

Through its committees, working groups, Board of Directors, and departmental staff, BPI's activities are governed by strict policies designed to promote and stimulate our free enterprise system. Download the BPI General Policy Statement Applicable to Standardization Programs to learn more.

Patent Policy Form

The Patent Holder Statement should be used to submit Intellectual Property (IP) tenders on BPI standards and bulletins. BPI conforms to the ANSI patent policy as set forth in the current version of ANSI Essential Requirements.

New Standard Proposal

To propose a new standard that fits within BPI’s scope as an ANSI American Standard Developer, please submit the New Standard Proposal Form.

Please see the FAQs or e-mail for further questions.

Get Involved

Getting involved in the BPI standards program offers companies, contractors, training organizations, and individuals an opportunity to influence the entire standards setting process and become an early player in market-shaping decisions.

Spanning the broadest collection of interests in the field, the BPI Standards program is comprised of dozens of active industry-wide stakeholders.

Standard Technical Committees

Each year, BPI solicits new members for its Standards Technical Commitees (STCs). You may apply by providing information about yourself, your company, and which standards groups you are interested in. Just complete the STC Membership Application and submit it to A representative from BPI's Standards department will review your information and contact you regarding your best opportunities.

STC Working Groups

If you are interested in participating in the STC working groups, please complete the Subject Matter Experts Information Form and submit it to using the instructions provided on the form.

Feedback on Proposed ANSI/BPI Standards

BPI encourages all interested stakeholders to provide technical and editorial comments on proposed standards during the announced formal public comment periods. This critical part of the open development process ensures that a consensus of those directly affected by the standards has been achieved.