Which of the following is not a component of an air handling unit (AHU)?

An air handling unit (AHU) is a crucial component of HVAC systems, responsible for regulating and circulating air. It typically includes several essential components that enable it to perform its function effectively. These components include fans that move air, filters that clean the air by removing particulates, and dampers that control air flow and pressure within the system.

Ducts, while integral to the overall HVAC system as they distribute conditioned air throughout the building, are not part of the AHU itself. Instead, ducts are separate conduits that connect to the AHU, facilitating the transportation of air to and from it. Therefore, identifying ducts as not a component of the AHU is accurate, reinforcing the understanding of how AHUs interface with other system elements within an HVAC setup.