CAV stands for "Constantly Airborne Vehicle" or "Constant Air Volume." It is a term used in the field of heating, ventilation, and air conditioning (HVAC) to describe a specific type of air distribution system.
In HVAC terminology, a CAV system refers to an air distribution system where a constant volume of air is supplied to a space regardless of the thermal load or demand. This means that the supply air remains constant, regardless of the temperature requirements or the number of people present in the space.
A CAV system typically consists of a centralized air handling unit that provides a fixed volume of conditioned air through a network of air ducts and diffusers. The air is usually supplied at a constant temperature and humidity level, ensuring a consistent environment throughout the space.
While a CAV system offers simplicity and cost-effectiveness in terms of design and installation, it may lack energy efficiency compared to more advanced systems. Since the air volume remains constant, the system may continue to supply excessive air even when the conditioned space has lower thermal loads, resulting in wasted energy.
In recent years, there has been a shift towards more energy-efficient air distribution systems, such as Variable Air Volume (VAV) systems, which allow for better control and modulation of the air supply based on the actual thermal load. Nonetheless, CAV systems still have their applications in certain situations, particularly in smaller buildings or areas with less variable occupancy rates and thermal loads.
