As part of the U.S. DOE Building America program, FSEC and CPS Energy are evaluating the performance of three homes in San Antonio, Texas with identical ~2,000 ft2 floor plans and orientation. One home built to builder standard practice serves as the control (CP1), while the other homes (CP2 & CP3) demonstrate high performance features.

Photvoltaic Home (CP3) Features:
- 37 HERS Index
- 2.4 kW roof-integrated PV array
- Sealed attic with R-28 spray polyurethane foam at the roof deck
- Frame walls with R-15 spray foam + R-3 rigid foam sheathing
- Energy Star windows, Uo = 0.34, SHGC = 0.32
- Enhanced air sealing
- SEER 18 air conditioner and 94% gas furnace
- Energy star appliances
- Fluorescent lighting package