How is airflow measured in HVAC systems?

Airflow in HVAC systems is primarily measured in cubic feet per minute (CFM). This measurement indicates the volume of air that moves through the system in one minute, allowing HVAC professionals to assess system efficiency, air distribution, and overall performance. CFM is a critical factor in determining whether an HVAC system is adequately sized and properly functioning to meet the heating and cooling demands of a space.

Measuring airflow in CFM provides a clear understanding of how much air is being circulated, which is essential for tasks such as balancing the system, ensuring proper ventilation, and maintaining indoor air quality. It helps technicians evaluate whether the airflow meets the design specifications of the heating and cooling systems in residential and commercial applications.

The other measurements mentioned do not apply to airflow directly: liters per second would be a valid measure for fluid dynamics in certain contexts, but HVAC standards primarily use CFM. Watts measure electrical power and are not relevant to airflow. Inches of water column is a unit used for measuring pressure, which may relate to airflow dynamics but does not provide a direct measurement of the airflow itself. Thus, CFM is the standard and most applicable measurement for assessing airflow in HVAC settings.