While remains a foundational document for the industry, it was officially superseded by ASHRAE 70-2023 in January 2023. The updated version reflects significant advancements in HVAC technology, particularly regarding displacement ventilation and more accurate measurement instrumentation. The Evolution of Standard 70: From 2006 to 2023
Provides Standard 70-2023 and reaffirmed versions of the 2006 edition.
: 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
: The standard now specifies commercially available test instruments with higher accuracy requirements than previous versions. Realistic Test Conditions ashrae standard 702006 pdf updated
ASHRAE Standard 70 establishes uniform, repeatable laboratory testing methods. It ensures that whenever an HVAC component manufacturer publishes performance data (such as throw distance, pressure drop, or noise criteria), that data can be directly and fairly compared across brands. Core Definitions Under the Standard
The basic purpose of ASHRAE Standard 70-2006 is to outline strict rules for testing air terminal devices under both uniform . This means testing occurs whether the supply air matches the room temperature or differs from it (such as heated or chilled supply air).
"Air outlets and inlets shall be tested in accordance with , 'Method of Testing the Performance of Air Outlets and Air Inlets,' and performance data (pressure drop, throw, and noise criteria) shall be submitted for review." While remains a foundational document for the industry,
The ASHRAE Standard 70-2006 PDF updated is available for download from the ASHRAE website. The updated version of the standard includes several changes and updates, including:
: Background noise must be low enough to prevent interference with the low-frequency sound power measurements of the test device. Aerodynamic Testing
Measuring the sound power levels produced by air-terminal devices. : Methods for calculating test data have been
: Updates test facility requirements and installation procedures to more accurately reflect how devices are used in real-world applications.
The standard defines the minimum length of straight, unobstructioned ductwork required upstream of the test device to eliminate air turbulence and ensure a uniform velocity profile.