HPXML establishes how data is defined, formatted, transmitted, structured, and used so that there is a clear understanding of how data is represented among stakeholders in the residential energy efficiency industry. HPXML also promotes the cost-effective exchange of information through a standard xml data transfer protocol. HPXML is managed by Home Performance Coalition.

Benefits of Standardization

Industry Efficiency

Improve industry efficiency by reducing the costs of collecting and exchanging data between market actors.


Facilitate quicker and more automated transfer of information across a diverse set of market actors.

High Quality Research

Standardize terminology and collect higher quality data as a means of tracking and quantifying work completed in the industry.

Tools + Resources

Data Dictionary

Defines terms and field formats for the energy efficiency industry

Transfer Standard

Requirements for a standard XML data transfer protocol

HPXML Validator

Validate your HPXML files against the schema and its datasets

Implementation Guide

Learn how to integrate HPXML into your work streams and products


Webinars, reports, and more to guide your implementation

Data Selection Tool

Understand how your data needs align with HPXML

Case Studies

Programs speak about their experience with HPXML

Working Group

Working group activities and how to become involved