Standard 90.1
Standard 90.1-2022—Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings
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90.1 Portal
With 90.1 Portal, view the standard and User’s Manual side-by-side in an all-new interface. Copy, paste, print, and annotate content with one click, and see interpretations, addenda, and errata in the context where they matter. Subscriptions are also available for a local network to provide affordable access for your entire office. Learn more
90.1 Training
ASHRAE continually offers several training options related to 90.1 including instructor-led training, on-demand eLearning, self-directed training, and training in conjunction with ASHRAE and other industry events. See the various options and sign up by viewing our Professional Development page.
More Ways to Buy
ASHRAE now offers publications in multiple formats so you can select the option that's best for you.
Printed Edition + PDF bundle—Purchase Standard 90.1 in print format and get electronic online access in PDF format, in addition to your print copy, for one low price.
Multi-user PDF—Purchase access to Standard 90.1 for use in your company for up to nine users.
Digital Collections—Need company-wide access? Digital Collections provide web-based, enterprise access to ASHRAE and other-industry publications for your information needs.
About Standard 90.1-2019
Standard 90.1 has been a benchmark for commercial building energy codes in the United States, and a key basis for codes and standards around the world, for almost half a century. This standard provides the minimum requirements for energy-efficient design of most sites and buildings, except low-rise residential buildings. It offers, in detail, the minimum energy efficiency requirements for design and construction of new sites and buildings and their systems, new portions of buildings and their systems, and new systems and equipment in existing buildings, as well as criteria for determining compliance with these requirements. It is an indispensable reference for engineers and other professionals involved in design of buildings, sites, and building systems.
Preview 90.1-2022
The 2022 edition of Standard 90.1 incorporates over 80 addenda to the 2019 edition. Major additions appearing for the first time in a minimum-efficiency U.S. model energy standard or code at the national level include:
- A minimum prescriptive requirement for on-site renewable energy
- An optional Mechanical System Performance Path allowing HVAC system efficiency tradeoffs based on the new total system performance ratio (TSPR) metric
- New requirements to address the impacts of thermal bridging
Other highlights include:
- An expanded scope to include sites as well as buildings
- New energy credit requirements for a customized approach to improving energy efficiency
- New informative guidance for using carbon emissions, site energy, or source energy as alternative performance metrics to the current energy cost metric
- Significant efficiency increases in IEER for commercial rooftops and a new SEER2/HSPF2 metric for <65K sized air-cooled heat pumps.
Full List of Changes
Superseded Editions of 90.1
Looking for previous revisions?
ASHRAE offers superseded editions of Standard 90.1 in the ASHRAE Bookstore. Find previous editions in the 'Document History' section of the 90.1 product page.
Standard 90.1-2019 User's Manual
This User's Manual provides detailed instruction for the design of commercial and high-rise residential buildings to ensure their compliance with ANSI/ASHRAE/IES Standard 90.1-2019. It includes measurements and calculations in both I-P and SI units, sample calculations, application examples, forms to demonstrate compliance, and references to helpful resources and websites.
View User’s Manuals to previous editions of the standard by clicking the “Document History” link from the product page.
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Other Available Resources
ICC - Significant Changes to the Internaions Energy Conservation Code
ICC -- Significant Changes to the International Energy Conservation Code and ANSI/ASHRAE/IES Standard 90.1-2010
Gain access to the most critical updates, the real-world application of those changes, and why they originated. Each change analysis features the affected code and Standard sections and identifies the change as added text, a modification of the existing language, or deleted text. Detailed illustrations and examples accompany each change.
Related Courses
Air-to-Air Energy Recovery Applications: Best Practices
Air-to-Air Energy Recovery Fundamentals
Air-to-Air Heat Recovery Fundamentals and Applications (MENA)
ASHRAE 90.1 Code Compliance and Plan Review for Authorities Having Jurisdiction
Basics of High-Performance Building Design
Choosing the Right Energy Code for your Project—IECC 2018 or ASHRAE 90.1-2016
Complying with Standard 90.1-2013
Complying with Standard 90.1-2013: Envelope/Lighting
Complying with Standard 90.1-2013: HVAC/Mechanical
Complying with Standard 90.1-2016
Complying with Standard 90.1-2016: Envelope/Lighting
Complying with Standard 90.1-2016: HVAC/Mechanical
Energy Modeling Best Practices and Applications
Exceeding Standard 90.1-2013 to Meet LEED® Requirements
Exceeding Standard 90.1-2013 to Meet LEED® Requirements
Evaluation Methods for High-Performance Green Buildings
Introduction to Buildings Enclosure Commissioning
Save 30% Complying with ASHRAE Standard 90.1-2013
Save Over 35% Using Appendix G of ASHRAE 90.1-2016
Standard 90.1: HVAC/Mechanical and Appendix G (MENA)
90.1 ECB App
A tool for modeling compliance with ASHRAE Standard 90.1-2010
What This Tool Can Do for You:
A free web application from ASHRAE automates the calculations needed to show a building project’s compliance with ASHRAE/IES Standard 90.1-2010 using the Energy Cost Budget (ECB) Method described in the standard. The calculations are based on the ECB Method Compliance Forms found in the 90.1-2010 User's Manual.
Input your project parameters and then calculate your proposed design’s projected performance and compliance—no need to build your own spreadsheet. Output your results in Microsoft® Excel® for your clients and project records.
The app is accessible from your desktop, tablet, or other device anywhere. Set up an account and store your project information in one place for easy reference and comparison.
Visit 901ECB.ashrae.org to register and get started.