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Anemometer Basics

A number of instruments typically called "anemometers" reliably measure air velocity. Some types use rotating vanes that measure air speed based on how fast moving air turns a small windmill-like device.Other styles use thermal anemometer technology that employ "hot wires" or thermisters that compare small changes in resistance and display it as an air velocity measurement.

These instruments can be used to conduct real-time surveys and some instruments allow the data to be recorded so different locations can be compared or a study can be done over time in a given location to help assess system performance or occupant comfort.

Proper ventilation, air velocity and even distribution are key contributors to perceived air quality and comfort. People tend to perform better when they are comfortable and offer fewer distractions to others due to complaints. It is good practice to make routine checks to ensure the HVAC system is performing as expected in each occupied zone.

Copyright © 2007 by TSI Incorporated

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