Case study of a DOE 2015 Housing Innovation Award-winning custom home in the mixed-humid climate that got a HERS 50 without PV, with 2-by-6, 16” on center walls with R-19 open-cell spray foam; basement with R-28 closed-cell spray foam, R-5 rigid foam under slab; sealed attic with R-28 open-cell spray foam under roof deck; 22.8 SEER; 12.5 HSPF heat pump.