ASHRAE Standard 70-2006 (RA 2021): Methods of Testing for Rating the Performance of Air Outlets and Inlets
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Provides the mathematical methods for calculating throws and pressure losses from raw test data.
Standard 70 is not an application standard; it is a . It establishes uniform procedures for determining:
The structural jump from the 2006 framework to the modern version accommodates decades of commercial HVAC engineering advancements. Broader Device Categorization
The ASHRAE Standard 70-2006 is essential for various stakeholders, including architects, engineers, builders, and building owners. The standard helps ensure that buildings are designed and constructed to meet specific thermal performance criteria, which can lead to:
Modern building codes (such as ASHRAE Standard 90.1) and green building certification systems (like LEED) mandate strict indoor environmental quality (IEQ) criteria. Standard 70 data helps engineers accurately model spaces to avoid drafts, uneven temperatures, and excessive noise. Prevention of Air Distribution Failures
Method of Testing for Rating the Performance of Air Outlets and Inlets Latest Update RA 2021 (Reaffirmed 2021) Scope HVAC Outlets/Inlets (Diffusers, Grilles) Key Metrics Throw, Pressure Drop, Sound Level Application Laboratory Testing
In spaces like schools, theaters, and hospitals, maintaining strict NC levels is mandatory. Standard 70 data prevents unexpected, noisy system behavior after installation.
Go to the (www.ashrae.org/bookstore). Search for "Standard 70." You will find ANSI/ASHRAE Standard 70-2020 . This is the updated standard you actually need. It is available as:
The 2023 revision introduces several critical improvements over the 2006 (and its 2021 reaffirmation) version to better align with modern HVAC technologies: Expanded Device Coverage
The standard covers several key aspects of HRV and ERV performance, including:
: A new Normative Appendix F was added specifically for rotating vane anemometer flow measuring systems.
If the throw distance is incorrectly calculated, occupants may feel drafts or experience stagnant air zones.