airvolume

Airvolume refers to the amount of air occupying a space or the amount of air moved or processed by ventilation and respiration. In building science, air volume denotes the free, occupiable space within a room or building, typically calculated as the product of floor area and ceiling height (V = length × width × height). This value is a key factor in sizing heating, ventilation, and air-conditioning (HVAC) equipment and in determining ventilation requirements, often expressed as air changes per hour (ACH) or in liters per second (L/s). The required ventilation rate depends on occupant density, equipment load, climate, and indoor air quality objectives. Larger air volumes dilute pollutants more slowly, so achieving acceptable indoor air quality may require higher ventilation rates in crowded spaces.

In practice, air volume is not strictly fixed; it can change with temperature, pressure differences, and occupancy. Air handling systems are designed to exchange, filter, or condition a portion of the space air to maintain comfort and air quality, while accounting for the existing volume.

In physiology, air volume also describes portions of lung air. Lung volumes quantify the amount of air in the lungs at different phases of breathing, including tidal volume, vital capacity, and residual volume. These measurements aid in assessing respiratory health and function.

The term bit “airvolume” may appear in brand names or product literature for ventilation and air-cleaning devices, but in technical contexts it generally aligns with concepts of space air volume and ventilation needs rather than a distinct physical constant.