Standard Active Last Updated: Feb 15, 2023 Track Document
ASTM D3464-96(2023)

Standard Test Method for Average Velocity in a Duct Using a Thermal Anemometer

Standard Test Method for Average Velocity in a Duct Using a Thermal Anemometer D3464-96R23 ASTM|D3464-96R23|en-US Standard Test Method for Average Velocity in a Duct Using a Thermal Anemometer Standard new BOS Vol. 11.07 Committee D22
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Significance and Use

5.1 The method presented is a “short method” that may be used where contamination levels are less than 5000 ppm by weight or volume, temperatures are between 0 °C (32 °F) and 65 °C (150 °F), and the humidity is not considered. The gas is considered as standard air and the velocity is read directly from the instrument.

5.2 This test method is useful for determining air velocities in HVAC ducts, fume hoods, vent stacks of nuclear power stations, and in performing model studies of pollution control devices.


1.1 This test method describes the measurement of the average velocity with a thermal anemometer for the purpose of determining gas flow in a stack, duct, or flue (1-5).2 It is limited to those applications where the gas is essentially air at ambient conditions and the temperature, moisture, and contaminant loading are insignificant as sources of error compared to the basic accuracy of the typical field situation.

1.2 The range of the test method is from 1 to 30 m/s (3 to 100 ft/s).

1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Book of Standards Volume: 11.07
Developed by Subcommittee: D22.03
Pages: 4
DOI: 10.1520/D3464-96R23
ICS Code: 17.120.10