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Last edited 18 Oct 2018
Face velocity is the measured air speed at an inlet or outlet of a heating ventilation and air conditioning (HVAC) system.
For example, a fume hood is a ventilated enclosure that is used to safely handle harmful or toxic fumes or vapours. Airflow into a hood is achieved by an exhaust blower which ‘pulls’ air into and through the hood and exhaust system. The resulting ‘pull’ at the opening of the hood is measured as face velocity.
Airflow velocity meters can be used to measure face veloity.
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