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Home arrow Resources arrow ASHRAE Glossary
Glossary

 

The terms and definitions included in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation, Air Conditioning & Refrigeration".
To access the complete glossary please visit ASHRAE's Bookstore.


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air change rate

airflow in volume units per hour divided by the building space volume in identical volume units [normally expressed in air changes per hour (ACH or ACPH)]. Mean air change rate over a specific period can be measured using ASTM E 741-83, “Test Method for Determining Air Leakage Rate by Tracer Dilution.” See also ventilating rate.

 

 

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