Chiller-water systems circulate conditioned water through which of the following?

Chiller-water systems are designed to circulate conditioned water, which is water that has been cooled by a chiller, through a network of individual fan/coil units located in the building. These fan/coil units utilize the cooled water to absorb heat from the indoor air, effectively lowering the temperature in specific areas of a building. This method of cooling is efficient as it allows localized control of temperature and enhances the overall comfort level within the space.

By circulating the chilled water directly through fan/coil units rather than through main HVAC ducts or chilled air units, a more consistent and efficient cooling process can be achieved. Fan/coil units provide the flexibility to address varying cooling needs in different rooms or zones, which is particularly useful in commercial settings where different areas may experience different heat loads.

In contrast, main HVAC ducts are typically used to distribute air, not water, while thermal insulation barriers play no role in the circulation of conditioned water. Chilled air units are a separate system that directly cools air rather than using water as a cooling medium. Thus, the most appropriate choice regarding the operation of chiller-water systems is the use of individual fan/coil units.