End Use Analysis of ANSI/ASHRAE/IES Standard 90.1-2019

The United States' national model energy standard for commercial buildings is ANSI/ASHRAE/IES Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings . First published in 1975 (and originally referred to as Standard 90), it provides minimum energy efficiency guidelines for designing, constructing, operating and maintaining new construction and renovated buildings. It is updated continuously, with new editions published every three years. When each new edition of the standard is published, energy and cost savings impacts are quantified by Pacific Northwest National Laboratory (PNNL) for the U.S. Department of Energy (DOE) Building Energy Codes Program 1 by performing building energy simulations of prototype building energy models 2 constructed to the previous and new edition. This ASHRAE Journal article is a detailed review of the simulation results that formed the basis of the report "Energy Savings Analysis: ANSI/ASHRAE/IES Standard 90.1-2019" 3 in support of DOE's Determination,* which details the qualitative and quantitative comparison of Standard 90.1-2019 to Standard 90.1-2016 to determine its energy savings impacts.