Measured Performance of Occupied, Side-by-Side, South Texas Homes

Stacey Rothgeb, Stacey Rothgeb (NREL Technical Monitor)

Research output: NRELSubcontract Report


The performance of three homes in San Antonio, Texas with identical floor plans and orientation were evaluated through a partnership between the Florida Solar Energy Center (FSEC), CPS Energy, and Woodside Homes of South Texas. Measurements included whole house gas and electric use as well as heating, cooling, hot water, major appliances and indoor and outdoor conditions. One home built tobuilder standard practice served as the control, while the other homes demonstrated high performance features. Utility peak electric load comparisons of these dual-fuel homes provide an assessment of envelope and equipment improvements. The control home used natural gas for space and water heating only, while the improved homes had gas heating and major appliances with the exception of a highefficiency heat pump in one home. Data collection began in July of 2009 and continued through April of 2011. Energy ratings for the homes yielded E-Scales (aka HERS indices) of 86 for the control home, 54 for one improved home and 37 for the other home which has a 2.4kW photovoltaic array.
Original languageAmerican English
Number of pages27
StatePublished - 2012

Bibliographical note

Work performed by Building America Partnership for Improved Residential Construction, Cocoa, Florida

NREL Publication Number

  • NREL/SR-5500-54727

Other Report Number

  • DOE/GO-102012-3577


  • Building America
  • Building America benchmark energy analysis
  • Building America Partnership for Improved Residential Construction
  • duct tightness
  • electric demand
  • envelope air sealing
  • measured performance
  • PV performance
  • residential buildings


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