A chilled water fan coil is a type of heating and cooling system that uses a coil filled with chilled water to provide cooling and heating. This type of system is commonly used in commercial buildings, such as office buildings, schools, and hospitals. The chilled water is circulated through the coil and then blown over the air in the room by a fan. This type of system is more efficient than traditional air conditioning systems, as it uses less energy to cool or heat the air. The chilled water fan coil also helps to reduce humidity levels in the room, making it more comfortable for occupants. The fan coil also helps to reduce noise levels, as the fan is quieter than traditional air conditioning systems. The chilled water fan coil is an efficient and cost-effective way to provide cooling and heating in commercial buildings.