Air volume flow is one of the fundamental parameters in ventilation and air conditioning technology. It describes how much air volume per hour is conveyed through ducts, units, or outlets. It is determined from flow velocity and cross-sectional area. Standards such as DIN EN 13779 define minimum volume flows for different uses. In residential buildings, a guideline value of approximately 25–30 m³/h per person applies. Variable air volume (VAV) systems dynamically adjust airflow to demand, saving energy. Correct design prevents drafts, noise issues, and ensures adequate air quality and heat dissipation.