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HPXML Implementation Guide

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The Home Performance Extensible Mark-Up Language (HPXML) Implementation Guide is designed to help program administrators, implementers, and software developers integrate HPXML into their operations and products. HPXML is an open data standard published by the Building Performance Institute (BPI) created to support a growing industry by facilitating communication and the exchange of information and data on residential buildings and energy performance.

HPXML is comprised of two standards:

  • Data dictionary (BPI-2200) that defines terms and data formats related to the physical attributes and performance of buildings and measures, and
  • Standard extensible mark-up language (XML) data transfer protocol (BPI-2100) that can be used to exchange data defined in the dictionary between different software systems.

If you are thinking about implementing HPXML, or just want to learn more about the data standard and how it may benefit your program or business, then this implementation guide will be a valuable resource. The guide is divided into two sections that are tailored to specific audiences.

HPXML is periodically updated to reflect changes in the needs of the market and the stakeholders that are using the standard. Whenever a new version of HXPML is released, the Implementation Guide will be updated to reflect changes to the data standard and how it is being used in the market. If you have questions about HPXML or believe you can contribute to the overall success of its deployment, please email us at For more information on HPXML, visit

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