ASHRAE Journal - April 2023 - 34
TECHNICAL FEATURE
End Use Analysis
Of ANSI/ASHRAE/IES
Standard 90.1-2019
BY CHITRA NAMBIAR, ASSOCIATE MEMBER ASHRAE; REID HART, P.E., MEMBER ASHRAE; MICHAEL ROSENBERG, FELLOW ASHRAE; SAMUEL ROSENBERG, ASSOCIATE MEMBER ASHRAE
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 Program1 by performing building energy simulations of prototype building
energy models2 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.
The objective is to discern how compliance with
Standard 90.1-2019 impacts energy use in prototypical
newly constructed commercial buildings by energy
end-use, building type and climate zones in the U.S. It
aims to provide ASHRAE technical committees and other
interested parties a better understanding of how the
standard affects various building systems and end uses,
specifically, those in the standard that most prominently
influence energy efficiency. Additionally, findings from
this study can provide industry stakeholders guidance
in identifying building types and end uses with the most
potential for energy efficiency improvements through
energy codes and those that may require beyond-code
measures to meet energy use reduction targets.
Chitra Nambiar is a research engineer, Reid Hart, P.E., is a retired senior research engineer, Michael Rosenberg is a chief scientist and Samuel Rosenberg is a data scientist at the
Pacific Northwest National Laboratory, Richland, Wash.
34
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ASHRAE Journal - April 2023
Table of Contents for the Digital Edition of ASHRAE Journal - April 2023
Contents
ASHRAE Journal - April 2023 - Cover1
ASHRAE Journal - April 2023 - Cover2
ASHRAE Journal - April 2023 - 1
ASHRAE Journal - April 2023 - Contents
ASHRAE Journal - April 2023 - 3
ASHRAE Journal - April 2023 - 4
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ASHRAE Journal - April 2023 - Cover3
ASHRAE Journal - April 2023 - Cover4
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