Redefines test facility and installation procedures to better reflect how devices are actually used in real-world applications.

All sensors—including thermal anemometers, manometers, and microphones—must feature high-precision accuracy and valid calibration traces to national standards (e.g., NIST). 4. Current Status: Reaffirmations and the "Updated" PDF

If you are working on a current project, you should likely be using . If you are specifically bound by a contract or code established in 2006, then Standard 70-2006 is the correct reference, but be aware it has been superseded.

For over fifteen years, the 2006 core testing rules remained the gold standard through successive Reaffirmed (RA) cycles, including ANSI/ASHRAE 70-2006 (RA 2021) . Reaffirmations mean the technical procedures remained identical, but the document was reviewed and kept active without structural updates. 2. The Current Version: ASHRAE Standard 70-2023