[ASHRAE 70-1991] ➔ [ASHRAE 70-2006] ➔ [(RA 2011) / (RA 2021)] ➔ [ASHRAE 70-2023 (Current)]
Standardizes industry terms such as grille (louvered face), register (grille with a damper), and diffuser (multi-directional distribution). Update Status
It measures sound power levels across octave bands (typically from 125 Hz to 4000 Hz), which engineers subsequently use to calculate the Noise Criterion (NC) rating listed in product catalogs. C. Static Pressure Drop
As of , the 2006 edition has been officially superseded. Most Recent Version: ANSI/ASHRAE Standard 70-2023 . ashrae standard 702006 pdf updated
): The effective area of the opening used to calculate velocity. 2. Test Setup and Methodologies
Understanding the evolution from the 2006 edition—including its Reaffirmed Applications (RA 2011 and RA 2021)—to the active 2023 edition is critical for HVAC designers, manufacturers, and testing laboratories. The Evolution of ASHRAE Standard 70
The 2023 edition represents a significant leap forward. ASHRAE Standard 70 was first published in 1972, revised in 1991 and 2006. The 2023 edition updates the 2006 edition by covering a and by specifying commercially available test instruments (updating the outdated equipment references from the 2006 version). [ASHRAE 70-1991] ➔ [ASHRAE 70-2006] ➔ [(RA 2011)
: Limited read-only versions of select standards are occasionally hosted on the ASHRAE Read-Only Versions page.
: The 2023 Update
Redefines test facility and installation procedures to better reflect how devices are actually used in real-world applications. Static Pressure Drop As of , the 2006
Understanding ASHRAE Standard 70-2006: Testing for Rating the Performance of Air Outlets and Inlets
: Updates installation procedures and facility definitions to more accurately reflect how devices perform in their intended real-world applications.