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90.1 Portal

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90.1 Portal is a multiple-publication online tool that brings together as never before ASHRAE Standard 90.1, User’s Manual guidance and tools, and a redline version that shows changes to the current standard from the previous edition. 90.1 Portal will change the way you use 90.1.

With 90.1 Portal, you can view each publication side by side or separately. Copy, paste, print, and annotate content. See official ASHRAE Interpretations in the context where they matter. When errata are issued, you’ll see them, as well.

Introductory 1-Year Subscription Price $169  $149*
ASHRAE Member Price $144  $127*
*Introductory price beginning  April 2

Enter 90.1 Portal

Standard 90.1 is used globally as a benchmark to set MEPS (minimum energy performance standards) and energy codes. It provides the minimum requirements for energy-efficient design of most buildings, except low-rise residential buildings. This standard offers detailed minimum energy efficiency requirements for design and construction of new 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 and building systems.

The 90.1 User's Manual provides detailed instruction for design of commercial and high-rise residential buildings to ensure compliance with ANSI/ASHRAE/IES Standard 90.1-2016. 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.

Looking for more technical guidance? Try ASHRAE Technology Portal.