CPS Energy / Woodside Hi-Performance Home, San Antonio, TX

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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.

High Performance Home (CP2) Features:
- 54 HERS Index
- Sealed attic with R-28 spray polyurethane foam at the roof deck
- Frame walls insulated to R-15 + R-3 rigid insulating sheathing
- Energy Star windows, Uo = 0.34, SHGC = 0.32
- Enhanced air sealing
- SEER 18 heat pump
- Energy star appliances
- Fluorescent lighting package

Feb 07 2010, 00:15 -To- Feb 08 2010, 00:00 EST

Electricity Usage	kWh	kBtus
Condenser unit	8.3	28.2
Air Handler	0.8	2.9
Water Heater	0.1	0.3
Total House	24.4	83.4
Interior Conditions	Average	Min/Max
Thermostat Temp (deg.F)	70.2	69.6/ 71.2
Thermostat Humidity (%RH)	49.5	47.7/ 51.9
Sealed Attic Temp (deg.F)	70.0	69.0/ 71.3
Sealed Attic Humidity (%RH)	44.6	42.9/ 46.9
Water Heater Inlet (deg.F)	59.2	56.3/ 63.7
Water Heater Outlet (deg.F)	75.3	56.9/ 118.4
Hot Water Flow	Tot/Avg	Min/Max
Tank Water Heater - Tot Gal	73.6	0.0/ 16.8
Tank Water Heater - Avg GPM	0.2	0.0/ 1.8
Hot Water Energy	Tot. Btu/Eff/Min
Tankless WH Gas Use	39780.0
Tankless WH Output	32093.0
Tankless WH Elec. Use	261.3
Tankless WH Period Effic.	0.801
HW circ pump RTime(min)	0.0
Natural Gas Usage	CuFt
Total House	37.8
Range Top	2.3
Water Heater	39.0
Dryer	0.3
Total House Energy in kBtu	kWh or Cuft	kBtu
Total House Gas Use (Cuft)	37.8	38.5
Hot Water Tank Gas Use (Cuft)	39.0	39.8
Range Top Gas Use (Cuft)	2.3	2.3
Dryer Gas Use (Cuft)	0.3	0.3
House Total Energy Use (Whrs)	24.4	83.4
A/C Compressor Power (Whrs)	8.3	28.2
A/C Air Handler Power (Whrs)	0.8	2.9
Tankless Hot Water Power (Whrs)	0.1	0.3