Stop 5: Newport Homebuilders showcased its 5,067-square-foot Biltmore II model in progress that achieved a HERS 71 rating, and features low-E windows, R-38 attic insulation and a radiant barrier roof deck, mechanically controlled fresh air ventilation system, dual-flush toilets and low-flow faucets and showerheads, drip irrigation, and a programmable hot water circulation system. A peek inside the attic though, showed air ducts running in unconditioned space, which is not optimal. The builder is shooting for a Silver level certification under the National Green Building Standard when complete.