What is HPXML?

HPXML is a national Building Performance Institute Data Dictionary and Standard Transfer Protocol created to reduce transactional costs associated with exchanging information between market actors.

A Connected Industry

In today’s residential energy efficiency market the electronic exchange of information and data is often characterized by a lack of common terms, definitions, and two-way feedback systems. This limits the ability of decision-makers to access, aggregate, share and use data for the design and implementation of energy efficiency programs. This also makes it difficult for market actors to understand the drivers of variation in performance, analyze program and market trends, and project savings from energy efficiency investments.

HPXML makes it easier and quicker to exchange information and data on residential building and energy performance.

By adopting HPXML, Arizona Public Service was able to manage its home performance program more efficiently and transparently. More efficient processes and better contractor and customer engagement led to an all-around more successful program for the stakeholders involved.

Chris Baker, Sr. Program Manager, Home Performance with ENERGY STAR


Reduce Administrative Costs

APS reduced quality assurance administrative labor by 50% after implementation of HPXML-compliant software environment

Improve Contractor Satisfaction

Arizona home performance contractors reduced administrative costs by 31% after implementation of HPXML

Reduce Software Development Costs

Northeast utility adoption of HPXML - compliant software reduced set-up period by at least 5 months

Enhance Home Value

Leverage investment in HPXML to provide HEScore functionality with minimum development cost with the HEScore Translator

Facilitate High-Quality Research

The aggregation of standardized data supports comparability and research on the benefits of energy upgrades

Automate Review Processes

Time to approve 90% of NYSERDA projects was reduced from 8 days to minutes from validation of standardized data

Case Study: Improving Arizona Home Performance

"The net impact of implementing the HPXML-compliant software and market-based energy assessment software options for contractors...has been a more efficient and cost-effective program that is better able to serve its 4,000 customers."

Switching to an HPXML-compatible energy modeling software has been a critical step in the growth and development of our home performance business. [It] has significantly reduced the time required to prepare Home Energy Assessment Reports and secure rebates for our clients. HPXML has improved our accuracy and reduced our costs.

Chris Mari, Healthy Home Energy & Consulting, Inc.

HPXML has enabled EnergySavvy to standardize our data collection and exchange process for in-home audits, reducing the time required to setup new programs for clients while increasing the quality of the data collected. In addition, the use of HPXML has lowered the on-going maintenance and upgrade costs for our clients.

JJ Augenbraun, Sr. Client Engagement Manager

Who's Using HPXML?

Software Tools

Cake Systems
Open Energy Efficiency

Performance Systems Development

Pivotal Energy Solutions
Snugg Pro


Arizona Public Service
Build It Green
Efficiency Vermont
NYS Energy and Research Development Authority
Pacific Gas and Electric Company
PSEG Long Island
Salt River Project

San Diego Gas & Electric
Southern California Edison