Fan coil unit

A fan coil unit, often shortened to FCU, is the indoor part of a central or water-based air conditioning system. Instead of holding refrigerant itself, it receives chilled or hot water from a central plant, usually a chiller or boiler on the building's roof or in a plant room. The unit then does the local work of moving air through that water.

The main parts are a heat exchanger coil, a fan (often a centrifugal or cross-flow blower), a filter, a drain pan, and a control valve or thermostat. Warm room air is drawn in through the filter, passes over the coil where heat is exchanged with the water, and is blown back out through the outlet grille. The drain pan catches condensate that forms on the coil when the water is cold, which matters in humid Singapore conditions.

Fan coil units show up in offices, hotels, shopping centres, hospitals, and larger residential blocks where one central chiller serves many rooms. Because each unit can be switched or valved separately, occupants can adjust their own zone without running the whole system. Their performance depends on the water temperature, the fan speed, and how well the filter and coil are kept clean.

If you are looking for a contractor who installs, services, or repairs this kind of equipment, you can browse aircon installation providers in the directory.