While the core purpose remains the same, the 2023 edition is the most significant update to this standard in nearly two decades. The table below summarizes the key differences:
ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) Standard 70-2006 is a widely recognized standard that provides guidelines for the thermal performance of buildings. The standard, titled "Method of Testing the Performance of Air-to-Air Heat Recovery Ventilators," outlines the testing and rating procedures for air-to-air heat recovery ventilators (HRVs) and energy recovery ventilators (ERVs).
) : The pressure exerting force perpendicular to the duct walls. High static pressure increases fan energy consumption. Total Pressure ( Ptcap P sub t
Any device or structural opening designed to discharge conditioned air into a room or defined zone.
The standard covers several key aspects of HRV and ERV performance, including: ashrae standard 702006 pdf updated
ASHRAE Standard 70-2006 defines uniform methods for testing and rating the aerodynamic and acoustic performance of air outlets and inlets. This includes equipment like grilles, registers, diffusers, and louvers.
Determining the sound power levels produced by the air as it passes through the device. Isothermal and Non-isothermal Testing:
While the 2006 version was reaffirmed in 2011 (RA 2011) and 2021 (RA 2021), it has now been fully superseded by the 2023 edition. Key Updates in Standard 70-2023
ASHRAE provides Read-Only Versions of many standards for public viewing, though printing or downloading usually requires a purchase. While the core purpose remains the same, the
Key aspects of the standard include:
Specifies the required setup, including test chambers, airflow measurement devices, and acoustic equipment.
The standard offers several benefits to building owners, architects, engineers, and manufacturers, including:
A: OSHA (Occupational Safety and Health Administration) references ASME, not directly ASHRAE 70. However, OSHA’s process safety management (PSM) standard requires using "recognized and generally accepted good engineering practices" (RAGAGEP). In 2024, the 2006 version is no longer considered RAGAGEP. The updated RAGAGEP is 70-2020. ) : The pressure exerting force perpendicular to
For professional use, ASHRAE standards are typically purchased as protected PDF files.
No legitimate free copy exists – ASHRAE holds full copyright.
Whether referencing the legacy 2006 version or the updated 2023 text, the structural purpose of this standard remains focused on providing a uniform laboratory method to rate terminal air devices. It dictates how manufacturers test products so that an engineer comparing Catalog A to Catalog B is looking at equivalent data. 1. Aerodynamic Performance