Through a funding contract with the U.S. Department of Energy, ASHRAE has posted the I-P edition of ANSI/ASHRAE/IES Standard 90.1-277, Energy Standard for Buildings Except Low-Rise Residential Buildings, as a free, downloadable PDF. It can be downloaded at

To download the PDF, users must complete a brief form with personal contact information. After submitting this form, an email with links to download the standard, as well as the Standard 90.1-2007 supplement, is emailed to the email address provided. The links are valid for 24 hours following the initial form submission.

“Standard 90.1-2007 is widely used throughout the design community, and the download version makes it available to users at their own computers for ready and easy access,” ASHRAE president Lynn G. Bellenger says. “Making the standard available for free ensures that it penetrates the marketplace and reaches owners, contractors and design teams. We appreciate the support of the Department of Energy in reaching a wider audience and extending access to our flagship energy conservation standard.”