Case study of a DOE Zero Energy Ready home in Denver, CO, that achieves HERS 38 without PV or HERS -3 with 8.0 kW of PV. The 2,115-ft2 two-story production home has 9.5-in.-thick double-stud walls filled with R-40 of blown fiberglass; a vented attic with R-50 blown fiberglass; an insulated, conditioned basement; a high-efficiency heat pump with 97.3 AFUE gas backup furnace; a tankless water heater; 100% CFL lighting; and ENERGY STAR appliances.