Case study of a DOE Zero Energy Ready Home in Long Island, NY, that scored HERS 43 without PV. This 5,088-square-foot custom home has R-25 double-stud walls, a vaulted roof with R-40 blown cellulose, R-10 XPS under slab, a hydro air system with 91% efficient boiler for forced air and radiant floor heat, and 100% LED lights.