Case Studies

Case study describing a DOE Zero Energy Ready Home 2021 Housing Innovation Award winning custom for buyer home in the marine climate that achieved a HERS -22 with PV or HERS 35 without PV.

Case study describing a DOE Zero Energy Ready Home 2021 Housing Innovation Award winning production home in the cold climate that achieved a HERS 5 with PV or HERS 39 without PV.

Case study describing a DOE Zero Energy Ready Home 2021 Housing Innovation Award winning affordable home in the mixed-humid climate that achieved a HERS 33 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom spec home in the mixed-dry climate that used 2x6 16-in. o.c. walls, R-25 spray foam attic insulation, and 3.45 kW of solar panels to achieve a HERS score of 30 with PV and 45 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom spec home in the cold climate that used R-22 ICF walls, an ICF insulated basement, and an R-50 cellulose attic insulation to achieve a HERS score of 49 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the marine climate that used R-28 SIP walls, a ground-source heat pump, triple-pane windows, and 9.92 kW of solar panels to achieve a HERS score of -18 with PV and 39 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning affordable home in the mixed-humid climate that used modular construction with R-33.5 double walls, R-50 fiberglass attic insulation, and 5.12 kW of solar panels to score a HERS of 1 with PV and 40...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the cold climate that used 2x6 24-in. o.c. walls, R-38 blown fiberglass in attic, an insulated basement, triple-pane windows, and 9.75 kW of solar panels to achieve a HERS score...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the hot-humid climate that used 2x6 24-in. o.c. walls with mineral wool and insulated sheathing, triple-pane windows, and 6.3-kW of solar panels for a HERS score of 3 with PV and...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning attached home in the cold climate that used panelized wall construction with 2x6 24-in. o.c. walls, aerosolized acrylic sealant, and R-60 blown fiberglass in attic to achieve a HERS score of 50 without PV...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning affordable home in the cold climate that used 2x6 24-in. o.c. walls, an R-60 vented attic, a ductless mini-split with transfer fans over bedroom doors, and triple-pane windows to achieve a HERS score of...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning production home in the mixed-humid climate that used panelized 2x6 24-in. o.c. walls, R-49 cellulose in the attic, an unvented crawl, and 6.12 kW of solar panels to achieve a HERS score of 4 with PV and...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning production home in the mixed-humid climate that used 2x6 24-in. o.c. walls, an R-49 insulated attic, and an unvented insulated crawl space to achieve a HERS score of 46 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning production home in the mixed-humid climate that used 2x6 16-inch on-center walls, an R-49 insulted attic, and insulated basement to achieve a HERS score of 45 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning attached home in the mixed-humid climate that used 2x6 16-inch on-center walls, an R-49 insulated attic, and an insulated conditioned basement to achieve a HERS score of 45 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning production homes in the mixed-dry climate that used spray-foamed 2x6 16-in. o.c. walls and attic, aerosolized acrylic whole-house sealant, and 3.74 kW of solar panels to achieve a HERS score of 14 with PV...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom spec home in the cold climate that used 2x6 24-inch on-center walls, R-50 fiberglass in the attic, an unvented crawlspace, and 4.125 kW of solar PV to achieve a HERS 26 with PV and 47 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning production home in the hot-humid climate that used 2x6 24-inch on-center walls, R-21 open-cell spray foam in the attic, and 5.2kW of solar panels to achieve a HERS score of 17 with PV and 53 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom for buyer home in the mixed-humid climate that used 2x6 24-in. o.c. walls, R-28 open-cell spray foam in attic, and 7.14-kW of solar panels to achieve a HERS score of 9 with PV and 54 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the mixed-humid climate that used 2x4 16-inch on-center walls, and R-30 open-cell spray foam attic insulation to achieve a HERS score of 47 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom spec home in the hot-humid climate that used 2x6 16-in. o.c. walls, R-38 spray-foam in attic, rigid mineral wool in basement, 5.44 kW of solar panels, and a 10-kW battery to achieve a HERS score of...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the hot-humid climate that used 2x6 and 2x4, 16-in. o.c. R-24 walls, an R-38 spray-foamed attic, and high-SEER heat pump to achieve a HERS score of 49 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the mixed-humid climate that used 2x6 16-in. o.c. walls, R-65 spray foam and fiberglass attic insulation, 18 kW of solar panels, and three 14-kW batteries to score HERS 1 with PV...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the marine climate that used graphite SIP walls and roof, triple-pane windows, an air-to-water heat pump, and 10.56 kW of solar to achieve a HERS score of -23 with PV and 33...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning production home in the cold climate that used R-39 double walls, R-50 fiberglass in attic, 9.88 kW of solar panels, and 10 kW of battery storage to achieve a HERS score of 9 with PV and 42 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the cold climate that used 2x4 16-in. o.c. walls, R-50 fiberglass in attic, R-10 rigid polyiso on basement walls, and aerosolized acrylic sealant to achieve a HERS score of 35...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the cold climate that used R-53 double walls, R-70 cellulose in attic, triple-pane windows, 25 kW of solar panels, and a mini-split heat pump for a HERS score of 31 without PV.

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning production home in the mixed-dry climate that used 2x6 16-in. o.c. walls with 5.5 inches of spray foam plus R-5 rigid continuous insulation, R-33 open-cell spray foam attic insulation, and 6.23 kW rooftop...

Case study poster describing a DOE Zero Energy Ready Home 2022 Housing Innovation Award winning custom-for-buyer home in the cold climate that used R-22 ICF walls, a spray-foamed attic and slab, triple-pane windows, and 13.74 kW solar PV roof shingles to score HERS -13 with PV or 26 without PV.

Case study describing a DOE Zero Energy Ready Home 2017 Housing Innovation Award winning custom for buyer home in the hot-dry climate that achieved a HERS score of -92 with PV and batteries and 43 without PV.

Case study describing the construction of prototype zero energy ready high-performance manufactured homes in the Pacific Northwest.