Fan-coil Components: A Guide to the Essential Parts


Fan-coil systems are a type of HVAC (heating, ventilation, and air conditioning) system that are commonly used in commercial and residential buildings. They work by using a fan to circulate air over a coil that is either heated or cooled, depending on the desired temperature. The components of a fan-coil system include the fan, coil, filter, control valve, thermostat, and piping.


The fan is responsible for circulating air over the coil. It can be either a centrifugal or axial fan, depending on the specific design of the system. Centrifugal fans are typically used in larger systems where a greater amount of air flow is required. Axial fans, on the other hand, are used in smaller systems where a lower air flow rate is sufficient.

The coil is the component that is responsible for heating or cooling the air. It consists of a series of tubes that are filled with either hot water or chilled water. The water is circulated through the tubes, and as air is blown over the tubes, it is either heated or cooled, depending on the temperature of the water in the tubes.

The filter is an important component of the system, as it helps to remove impurities from the air. This is important not only for air quality, but also for the proper functioning of the system. A clogged filter can reduce air flow and cause the system to work less efficiently.

The control valve is responsible for regulating the flow of water through the coil. It is typically controlled by a thermostat that is located in the room or area that the system is serving. The thermostat senses the temperature of the air in the room and sends a signal to the control valve to adjust the flow of water through the coil.


The thermostat is the component that is responsible for sensing the temperature in the room and sending signals to the control valve. There are a variety of thermostats available for use with fan-coil systems, including digital and programmable thermostats.

Finally, the piping connects all of the components of the system together. It is typically made of copper or PVC, and is used to circulate water from the chiller or boiler to the fan-coil unit.

In conclusion, the components of a fan-coil system work together to provide heating and cooling to a building. Each component plays an important role in the functioning of the system, and it is important to properly maintain and replace them as necessary to ensure the system operates efficiently and effectively.

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