Which type of HVAC system is indicated in the schematic diagram?

A constant air-volume HVAC system is characterized by maintaining a constant airflow rate throughout the system. This type of system typically uses a fan to push air through ducts that deliver it to various spaces. The main feature is that the air volume remains unchanged, while the temperature may vary depending on the heating or cooling needs of the space.

In a schematic diagram of a constant air-volume system, you would expect to see components such as ductwork, air handling units, and potentially some simple control devices, but there would be no variable dampers or complex control mechanisms that adjust the airflow based on occupancy or temperature needs. These features differentiate it from other types of systems, such as variable air-volume systems, which adjust the amount of air being delivered to maintain temperature without changing the total airflow.

Overall, recognizing these key characteristics helps in accurately identifying a constant air-volume system in schematic representations.