Introduction

An organized group of members of the home performance community with the support of the private, utility, and public sectors, conceived of and developed the Building Performance Institute’s (BPI) BPI-2100 and BPI-2200 data standards commonly referred to as (“HPXML”). To expedite its deployment into the market, Home Performance with ENERGY STAR® developed this HPXML Implementation Guide to help program administrators and software developers integrate HPXML into their operations and products. Simply put, HPXML is a set of common definitions for the attributes of the systems in a home and the computing language that facilitates the quick and easy transfer of home-related data between different market actors. Without HPXML, home improvement contractors cannot easily exchange data with partnering businesses, energy efficiency programs, the real estate market, or the financial sector.

As conveyed in Figure 1 below, today there is a fragmented, siloed marketplace where exchange of data occurs but with non-uniform definitions for metrics and a lack of for two-way feedback systems. Figure 2 represents a market where HPXML has been successfully integrated which facilitates the easy exchange of data between and among different market actors. While each market actor would have specific uses for some data, other data could be shared creating more value for residential energy efficiency as a whole ultimately translating into greater energy savings from a more efficient marketplace.

It is the expectation of the U.S. Department of Energy that expanded use of HPXML will achieve the following:

  • Reduce time and cost of collecting and transferring home and energy-related data;
  • Foster new and strengthen existing organizational relationships within the residential supply chain;
  • Increase the transparency of energy efficiency work tto facilitate deeper market penetration of energy efficiency products and services;
  • Enhance ability to quantify energy savings through standardized, data-rich EM&V methods;
  • Improve the quality assurance systems and practices needed to efficiently support, measure and verify energy performance.

Significant effort has gone into the development of HPXML and this Implementation Guide, but the work is not complete. HPXML is constantly being improved and this Implementation Guide will benefit from the lessons learned by different organizations integrating HPXML into their operations. If you have questions about HPXML or believe you can contribute to the overall success of its deployment, please email us at homeperformance@energystar.gov. HPXML was developed and deployed through a collaborative process, and we intend to continue in that spirit to expand its execution and improvement.