Case Studies

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.

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.

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

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

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

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 heat pump water heaters compared to electric resistance water heaters.

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

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