Case study of a DOE Zero Energy Ready home in Double Oak, TX, north of Dallas, that scored a HERS 44 without PV. The 3,752-ft2 two-story home served as an energy-efficient model home for the custom home builder: 1,300 visitors toured the home, thousands more learned about the home’s advanced construction via the webpage, YouTube, Twitter, Facebook, Instagram, and Pinterest.
Case study of a DOE Zero Energy Ready home in Houston, TX, that achieves a HERS 45 without PV or HERS 32 with 1.2 kW PV. The three-story, 4,507-ft2 custom home is powered by a unique tri-generation system that supplies all of the home’s electricity, heating, and cooling on site. The tri-generator is powered by a small efficient natural gas generator that produces electricity with photovoltaic and battery backup. The generator’s belt also mechanically drives the compressor for the home’s air conditioner.
Case study of a DOE Zero Energy Ready affordable home in Garland, TX, that was the first retrofit home certified to the DOE Zero Energy Ready home requirements. The construction team achieved a HERS score of 59 without PV by gutting the home to the 2x4 studs, then filling the walls with R-22 of closed-cell spray foam, covering the attic floor with R-39 of closed-cell spray foam, covering the underside of the floor deck with R-39 of closed-cell spray foam and installing new high-performance windows, appliances, and lighting.