ASHRAE 41.2-2026

Current Revision
Standard Methods for Air Velocity and Airflow Measurement (ANSI Approved)

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ASHRAE 41.2-2026
ASHRAE Standard 41.2 provides recommended practices for airflow measurements as well as measurement procedures for use in preparation of other ASHRAE standards.

The 2026 edition includes an update of the steady-state criteria for recording data, an addition that covers airflow mixing devices, an addition that permits the optional use of legacy multiple-nozzle chambers that were specified in the original 1987 version of this standard (reaffirmed in 1992), and changes to make it easier for higher-tier ASHRAE standards to adopt this standard by reference.

This revision of Standard 41.2 meets ASHRAE's mandatory language requirements.
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