To decrease the $225 billion that U.S. consumers spend each year in household energy costs will require accurate, reliable information about how new technologies perform in realistic building systems. Though the construction industry continues to investigate new ways to meet market demands, the data and tools necessary to make informed design decisions have been hard to come by. NIST’s Net- Zero Energy House provides a unique platform to evaluate new equipment and design approaches that will improve energy efficiency and air quality in residential buildings.
Lessons learned from NIST’s Net-Zero Energy Residential Test Facility (NZERTF) are inspiring the next generation of home appliances and heating and cooling systems. The NZERTF is providing desperately needed data to evaluate which technologies work in the real world, and to spur their market acceptance and lower consumers’ costs.
A “net-zero energy” house produces as much energy as it consumes over the course of a year. The NZERTF—which was built to resemble a suburban home and is occupied by a simulated family of four—uses a network of sensors to monitor energy usage and environmental conditions around the clock. In its first year, the facility exceeded its goal and generated more energy than it consumed by incorporating commercially available technologies and energy-efficient building practices.
Emerging energy management techniques tested at the NZERTF include new construction methods; integrated architectural design; renewable energy sources; and high-efficiency systems for heating, cooling, humidity control and many other functions.
The NIST Net-Zero Energy House will serve as a test bed for technology development and building practices for years to come, setting the stage for more efficient homes. Already, the facility provides large home builders with a model for energy-efficient design and lessons on how to overcome one of the challenges of energy efficiency—ensuring indoor air quality. At organizations such as the International Energy Agency and Ingersoll Rand, data from the NIST facility are being leveraged to create new heat pump designs.
74% more efficient than a similarly sized single-family home in the same climate
>1.5 GB of data generated each year from monitoring building subsystems
2,138 kWh energy surplus achieved by the NZERTF during the second year of operation
“The NZERTF has made a significant contribution to the way that architects and homebuilders think about zero-energy homes. By providing easily accessed information regarding the design of the home, along with products and equipment that were used, and then doing the same with monitored results, architects and homebuilders can make informed decisions regarding their own projects.”
– Betsy Pettit, President, Building Science Corporation
“By sharing information about the NZERTF with our Trane and American Standard HVAC businesses, NIST helped influence Ingersoll Rand’s thinking about net-zero homes and future heating, ventilation, and air conditioning products for high-performance and net-zero homes.”
– Frank Rolles, Director of Innovation, Ingersoll Rand