Case Studies

Case study describing a building project in the mixed-humid climate zone.

Case study describing a building project in the cold and very-cold climate zones.

Case study describing a building project in hot-dry and mixed-dry climates.

Case study describing a building project in the hot-humid climate zone.

Case study describing a building project in the cold climate.

Case study describing a year-long evaluation on residential hot water heating systems in a laboratory environment, regarding the evaluation of two residential electric heat pump water heaters (HPWHs), a solar thermal system utilizing a polymer glazed absorber, and a high efficiency natural gas...

Case study describing an alternative ground source heat pump (GSHP) cold-climate application in an attempt to reduce the installation cost of the ground loop portion by containing the entire loop beneath the basement slab.

Case study describing the performance of a small-diameter, high-velocity heat pump system compared to a conventional system in two identical new construction triplex townhouses.

Study demonstrating the performance of multiple CO 2 heat pump water heaters utilized in a “swing tank” CHPWH system design in a 60-unit low-rise multifamily building in the Pacific Northwest.

Case study describing a building project in the mixed-humid climate zone.

Case study describing a new construction project designed to achieve an 87% reduction in source energy use when compared to the 2009 Building America Benchmark.

Study focusing on the installation of a new commercial heat pump water heating system installed as a retrofit in a 100-unit, low-income senior housing building in Seattle, WA.

Case study describing a 2015 Housing Innovation Award-winner built by BPC Green Builders in Watertown, Connecticut.

Case study describing a DOE Zero Energy Ready Home 2017 Housing Innovation Award winner that scored HERS 41 without PV and 8 with PV.

Case study describing a DOE Zero Energy Ready Home 2017 Housing Innovation Award winner that scored HERS 38 without PV and 4 with PV.

Case study describing a multifamily deep energy retrofit project in Annapolis, Maryland.

Case study describing an energy efficient retrofit project in hot-humid climates.

Case study describing a deep energy renovation of a home in Florida.

Case study describing a cost-effectively reducing energy use by over 50% in an existing home.

Case study describing a retrofit project in the hot-dry and mixed-dry climate zones.

Case study describing an energy efficient renovation in the cold climate.

Case study describing a building project in the mixed-humid climate zone.

Case study describing a building project in the mixed-humid climate zone.

Study focusing on the installation of a custom engineered CHPWH system in the parking garage of an apartment building in Seattle, WA.

Case study describing a new home construction project in the mixed-humid climate.

Case study describing a new home construction project in the cold climate.

Case study describing a new home construction project in the hot-humid climate.

Case study describing William Ryan Homes and their achievement of reducing whole house source energy use by 40% and receiving HERS scores of 65 to 70 by utilizing high efficiency heat pumps with engineered duct design.

Case study describing a building project in the mixed-humid climate zone.

Case study describing a building project in the hot-humid climate zone.

Case study describing a new building project that partnered with Habitat for Humanity.

Case study describing a new construction project in North Carolina.

Case study describing a building project in the marine climate.

Case study describing a building project in the mixed-humid climate zone.

Case study describing a new construction project in the mixed-humid climate zone.

Case study describing a builder in Georgia that designs energy-efficient homes for a green community, yielding homes with HERS scores as lowas 59 and electric bills as low as $50 a month.

Case study describing a building project in the hot-humid climate zone.

Case study describing a production builder that achieves HERS scores of 60, compared to 85 for other builders that build new homes to Florida code.

Case study describing the first multifamily projects nationwide to be certified under the U.S. Department of Energy's Zero Energy Ready Home program.

Case study describing the New American Home project.

Case study describing an effort to research, design, verify, and document a heat pump water heating system for a multifamily building using the building sewage as the heat pump’s heat source.

Case study describing a building project in the mixed-humid climate zone.

Case study describing the performance of air-to-water heat pump systems in dry climates.

Case study describing the performance of heat pump water heaters compared to electric resistance water heaters.

Case study describing how researchers monitored heat output and electricity consumption of air-source heat pumps

Case study describing how heat pump water heaters can be cost-effective alternatives to traditional electric resistance water heaters.

Case study describing the long-term monitoring of mini-split ductless heat pumps.

Case study describing a six month study that monitored performance of a heat pump water heater.

Case study describing innovative technologies, construction techniques, products, and design trends in new home construction.