Case study of a DOE 2015 Housing Innovation Award-winning custom home in the cold climate that got a HERS 30 without PV, with 2-by-8, 24” on center walls with blown fiberglass and 4” polyiso rigid foam; basement with 2” XPS interior, 4” under slab, 4” exterior of foundation wall; vented attic with R-100 blown cellulose; wo air-to-air heat pumps SEER 14.1; HSPF 9.6; heat pump water heater.