Performance of a Hot-Dry Climate Whole-House Retrofit

E. Weitzel, E. Porse, A. German

Research output: NRELSubcontract Report


The Stockton house retrofit is a two-story tudor style single family deep retrofit in the hot-dry climate of Stockton, CA. The home is representative of a deep retrofit option of the scaled home energy upgrade packages offered to targeted neighborhoods under the pilot Large-Scale Retrofit Program (LSRP) administered by the Alliance for Residential Building Innovation (ARBI). Deep retrofit packages expand on the standard package by adding HVAC, water heater and window upgrades to the ducting, attic and floor insulation, domestic hot water insulation, envelope sealing, lighting and ventilation upgrades. Site energy savings with the deep retrofit were 23% compared to the pre-retrofit case, and 15% higher than the savings estimated for the standard retrofit package. Energy savings were largely a result of the water heater upgrade, and a combination of the envelope sealing, insulation and HVAC upgrade. The HVAC system was of higher efficiency than the building code standard. Overall the financed retrofit would have been more cost effective had a less expensive HVAC system been selected and barriers to wall insulation remedied. The homeowner experienced improved comfort throughout the monitored period and was satisfied with the resulting utility bill savings.
Original languageAmerican English
Number of pages40
StatePublished - 2014

Bibliographical note

Work performed by Alliance for Residential Building Innovation (ARBI), Davis, California

NREL Publication Number

  • NREL/SR-5500-62159

Other Report Number

  • DOE/GO-102014-4443


  • arbi
  • Building America
  • California
  • deep energy enclosure retrofits (DER)
  • energy savings
  • high efficiency furnace
  • hot dry climate
  • mechanical systems
  • residential
  • residential buildings
  • retrofit
  • systems commissioning
  • systems monitoring
  • tankless
  • utility analysis
  • weatherization


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