The airflow rate (or air volume) of an industrial vacuum cleaner is a technical specification provided by the manufacturer and not something the user typically calculates directly. It is measured in cubic meters per hour (m³/h) or liters per second (L/s). This parameter indicates the volume of air the vacuum can move in a given time. High airflow is crucial for quickly removing large volumes of light materials, fine dust, or for centralized vacuum systems covering wide areas.