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How much energy will ANSI/ASHRAE/IES Standard 90.1-2019 save?

The US Department of Energy (DOE) has announced its preliminary determination of energy savings for ANSI/ASHRAE/IES Standard 90.1-2019, preliminarily affirming that the updated code will increase energy efficiency in commercial buildings. The Department’s analysis, performed by the Pacific Northwest National Laboratory (PNNL), indicates that buildings meeting Standard 90.1-2019 (as compared to the previous 2016 edition) would result in national average energy savings of approximately:

  • 4.7 percent site energy
  • 4.3 percent source energy
  • 4.3 percent energy cost
  • 4.2 percent carbon emissions

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