Final answer:
A chiller in a commercial building is an important component of the HVAC system. It is used to cool down the air or water in the building and is commonly used in large commercial buildings.
Step-by-step explanation:
A chiller in a commercial building is an important component of the HVAC (Heating, Ventilation, and Air Conditioning) system. It is a type of refrigeration equipment that is used to cool down the air or water in the building to maintain a comfortable temperature. The chiller works by removing heat from the space inside the building and transferring it to another location, usually the outside air. It is commonly used in large commercial buildings, such as office buildings, hospitals, and shopping malls.