Case study of a DOE Zero Energy Ready home in Danbury, Connecticut, that scored HERS 35 without PV. This two-story, 1,650-square-foot cabin built by a custom home builder for his own family meets Passive House Standards with 5.5-in. of foil-faced polyisocyanurate foam boards lining the outside walls, R-55 of rigid EPS foam under the slab, R-86 of blown cellulose in the attic, triple-pane windows, and a single ductless heat pump to heat and cool the entire home.