Case study of a DOE 2015 Housing Innovation Award-winning affordable home in the hot-humid climate that got a HERS 51 without PV, with foam-filled masonry block walls with .75” rigid foam, furring strips, and foil-faced paper on interior walls; R-20 open-cell spray foam in roof of sealed attic, uninsulated slab, 15 SEER 8.0 HSPF heat pump walls for heating and cooling, heat pump water heater.