Case Studies

Case study describing a window retrofit of a 1940s home in Phoenix AZ that included adding solar screens to previously upgraded windows.

Case study describing a DOE Zero Energy Ready Home 2013 Housing Innovation Award Winner in west Connecticut that scored HERS 39 without solar PV.

Case study about a Zero Energy Ready Home 2013 Housing Innovation Award Winner construction project in the marine climate.

Case study describing a DOE Zero Energy Ready Home 2013 Housing Innovation Award Winner in Herriman, UT, that scored HERS 40 without PV, -1 with PV.

Case study describing a DOE Zero Energy Ready Home 2013 Housing Innovation Award Winner in Ithaca, NY, that scored HERS 50 without PV.

Case study describing a DOE Zero Energy Ready Home 2013 Housing Innovation Award Winner in Phoenix, AZ that scored HERS 58 without PV and HERS 38 with PV.

Case study describing a DOE Zero Energy Ready Home 2013 Housing Innovation Award winning custom home in Downers Grove IL that scored HERS 35 without PV.

Case study describing a 4,763 ft2 certified Passive House that achieved HERS 27 without PV through the construction of R-54 walls that use ICF plus fiberglass cavity insulation, an R-100 vented attic, extensive air sealing and flashing, triple-pane windows, ductless heat pumps, and solar hot water.

Case study describing a DOE Zero Energy Ready Home 2014 Housing Innovation Award winner that scored HERS 45 without PV and 32 with PV and is the first home in the world to use a tri-generation system to supply electricity, heating, and cooling on site.

Case study describing a DOE Zero Energy Ready Home 2014 Housing Innovation Award winner that scored HERS 38 without PV and -3 with PV.

Case study describing a DOE Zero Energy Ready Home 2014 Housing Innovation Award winner that scored HERS 55 without PV and 15 with PV.

Case study describing a DOE Zero Energy Ready Home 2016 Housing Innovation Award winner that scored HERS 50 without PV.

Case study describing project and performance data and energy-efficiency measures for a DOE 2019 Housing Innovation Award winning home that was certified to the DOE Zero Energy Ready Home criteria.

Case study describing a gut rehab of a multifamily, masonry building.

Case study describing approaches to comprehensive retrofits that are in reach of the ordinary builder.

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

Case study describing one of three deep energy renovations of occupied affordable homes.

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

Case study describing analysis of pre-retrofit utility data from 1,166 houses to help determine energy savings on a community-scale.

Case study describing a retrofit project in Maryland.

Case study describing a deep energy retrofit, turning an old school into 12 high-end apartments in Greenfield, MA.

Case study describing a whole-house, deep energy retrofit project in the marine climate.

Case study describing a deep energy renovation of a home in the marine climate.

Case study describing a multifamily retrofit project in a cold climate.

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

Case study describing a multifamily, affordable housing retrofit project that achieved 44% energy savings using readily available, cost effective measures.

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 retrofit project in the cold and very-cold climate zones.

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

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 about a multifamily retrofit project using individual heat recovery ventilators in 10 separate building units.

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

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

Case study describing the retrofit of a 1960s split-level home.

Case study describing a retrofit project in the marine climate.

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

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

Case study describing a retrofit project in the marine climate.

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

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

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 marine climate.

Case study describing a builder in Texas that met the stringent requirements of the U.S. Department of Energy's Builders Challenge on over 779 homes in 2010.

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

Case study describing a 1963 mid-century modern home in Las Vegas that got an energy-efficiency overhaul, improving performance from a HERS score of 123 to 44, or net-zero when the 4.8 kW of photovoltaic panels are added.

Case study describing a new construction net zero energy home.

Case study describing a new construction project using high R-value enclosures with a hybrid insulation approach.

Case study describing 50% energy saving projects for new multifamily homes in cold climates.