Case study of a DOE Zero Energy Ready affordable home in Edgewater, FL, that achieves a HERS score of 49 without PV. The one-story, 1,250-ft2 home has 2x4 walls with fiberglass batt inside plus R-3 rigid foam on the exterior, ENERGY STAR lighting, appliances, and ceiling fans, a solar water heater, an ERV, and a high-efficiency heat pump. To keep the ducts in conditioned space, the Habitat affiliate installed a rigid foam board-lined duct chase above the ceiling in a 2-ft2 notch designed into the trusses by the truss manufacturer.