The U.S. Department of Energy (DOE) recently 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 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

What does this mean?

Upon publication of an affirmative determination, the 2019 edition of 90.1 is likely to become the new national energy reference standard, and as such states will be required to certify their codes meet or exceed it after a two-year period.

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