Developing Energy Efficiency Solutions for Residential Housing

GTI Energy’s efforts on residential energy use focuses on pathways for near to mid-term pathways for improving energy efficiency, reducing greenhouse gases, and integrating with renewable energy.


Affordable ZNE Home Construction

GTI Energy, in collaboration with Habitat for Humanity, is conducting a research project with funding from California Energy Commission and SoCalGas. This project will demonstrate that affordable zero net energy (ZNE) homes are readily achievable using low-cost construction techniques and on-site renewable energy in combination with high performance housing approaches developed from research and development over the past decade.

This will be done by developing all-electric and mixed-fuel prototype packages, and piloting them in two single family homes in the City of Stockton to validate ZNE building energy performance and consumer and building industry acceptance.


Affordable Zero Net Energy Design Guide eBook

During the entire project, information will be collected for an eBook entitled “Affordable Zero Net Energy Design Guide: Practical tips and traps based on measured results and construction,” detailing the design process, the measures applied, the construction process, and related “tips and traps” to achieve affordable, cost-effective ZNE. This eBook will be available on this page upon completion.


Affordable Zero Net Energy Design and Construction Training Webinars

A complimentary webinar training series that will take place in November and December 2020 has also been developed to present best practices to building ZNE homes in an energy and economically efficient way.

Learn More About the Training Webinars and Register

GTI Energy has also created a Guide to Best Practices for Home Energy Retrofits sponsored by the California Energy Commission.

As a research team leader for the U.S. Department of Energy’s Building America program, GTI Energy is working as part of the Partnership for Advanced Residential Retrofit (PARR) investigating how residential home performance improvements affect indoor air quality and how different types of mechanical ventilation mitigate any issues. Learn more about the PARR team and over 20 reports here.

Working with emerging technology partners, GTI Energy is involved with demonstration projects of emerging technology in homes, with a large focus on combined space heat and water systems (aka “Combi” systems). GTI Energy is also involved with demonstration projects in Illinois and New York for hybrid space conditioning systems that pair low-capacity furnaces with heat pumps that provide cooling and some heating. These projects have retrofitted systems in both market-rate and income-eligible homes to monitor energy savings over the heating and cooling seasons.

GTI Energy is also tackling the next low hanging fruit in residential energy consumption by investigating and performing applied research on residential hot water heating and distribution systems, including evaluation and demonstration of demand-controlled recirculation loops and hydronic heating combination systems.

Integrating energy efficiency systems with solid high-performance building enclosures sets the stage for zero net enegy (ZNE) homes, and GTI Energy is leading integrative evaluation of how energy efficiency systems integrate with distributed energy generation sources including solar photovoltaics, microgrids, and micro combined heat and power (mCHP) systems. This provides a holistic approach for on-site power generation and resilience for residential consumers.

The Building Research and Consulting team of GTI Energy’s subsidiary Frontier Energy develops innovative approaches for achieving energy efficiency in new and existing residential and small commercial buildings through systems and whole building research and development.

Award-Winning Source Energy and Emissions Factors Modeling Tool (Residential Module)

The publicly available residential module of the Source Energy and Emissions Factors Modeling Tool (formerly called Energy Planning Analysis Tool [EPAT]) provides regional U.S. estimates of site and full-cycle energy consumption, capital and operating costs for several residential energy applications, and full-cycle emissions. The American Gas Association has supported the addition of a new feature that adds Life Cycle Analysis (LCA) capabilities to the tool.

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