has been officially superseded. The updated active version is ANSI/ASHRAE Standard 70-2023 Key Updates in the 2023 Edition

: ASHRAE provides Read-Only Versions of many standards for public preview, though technical testing standards may have limited availability.

You can obtain official, updated copies of the PDF through the following authorized sources:

Measuring the sound power levels produced by air-terminal devices.

: Methods for calculating test data have been clarified to ensure they apply correctly to the wider variety of air devices currently on the market. New Appendices Informative Appendix E