Supersedes ANSI Approved Standard 140-2001

This standard specifies test procedures for evaluating the technical capabilities and ranges of applicability of computer programs that calculate the thermal performance of buildings and their HVAC systems.

These standard test procedures apply to building energy computer programs that calculate the thermal performance of a building and its mechanical systems. While these standard test procedures cannot test all algorithms within a building energy computer program, they can be used to indicate major flaws or limitations in capabilities.

This publication is available via printed copy or download. The download is a zip file which includes a PDF of the standard as well as supporting files included on a CD with the print version. You must have WinZip to open this file. The file is approximately 12 MB in size, so it is recommended that you have a high-speed connection when attempting to download.

Tax Deduction Information:

Under IRS rules, taxpayers' building energy use performance must be calculated using software that has been tested according to ANSI/ASHRAE Standard 140 to qualify for tax deductions put forth by the Energy Policy Act of 2005. Click here for the official IRS press release on commercial tax credits.

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Related Products:

I-P or SI Edition:
Standard 90.1-2004 " Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IESNA Co-sponsored)