What is the primary function of an HVAC 'chiller'?

The primary function of an HVAC chiller is to cool air or fluid in large commercial buildings. Chillers operate by removing heat from a specified medium, typically water, which is then circulated throughout the building to provide cooling. This process involves a refrigeration cycle, where the chiller absorbs heat from the water and dissipates it through a condenser, effectively lowering the temperature of the fluid.

In larger commercial settings, chillers are essential for maintaining comfortable indoor temperatures, especially in environments that generate significant heat or require strict climate control, such as data centers or manufacturing facilities. This makes them a critical component of the HVAC system in ensuring efficient climate regulation throughout extensive and complex facilities.

The other options describe functions related to different HVAC components or systems, but they do not pertain to the specific role of a chiller in cooling processes.