Fan coil units (FCUs) are used in various heating, ventilation, and air conditioning (HVAC) applications to provide localized heating and cooling. These devices are designed to circulate air through a coil that is either heated or cooled to maintain the desired temperature and humidity levels in a space. FCUs are available in different types and sizes, and choosing the right one for your specific application is essential. Here are the different types of fan coil units and the importance of properly sizing your FCU:
Types of Fan Coil Units
- Chilled Water Fan Coil Units: These units use chilled water to cool the air passing over the coil. They are commonly used in large commercial buildings and provide efficient cooling.
- Hot Water Fan Coil Units: These units use hot water to heat the air passing over the coil. They are commonly used in commercial and residential buildings and provide efficient heating.
- Electric Fan Coil Units: These units use electric heating elements to heat the air passing over the coil. They are commonly used in residential buildings and are relatively inexpensive to install.
- Ducted Fan Coil Units: These units are designed to be integrated with ductwork and provide centralized heating and cooling for larger spaces.

Importance of Properly Sizing Your Fan Coil Unit
- Energy Efficiency: Properly sizing your FCU ensures it operates at its maximum efficiency, reducing energy consumption and operating costs. An improperly sized FCU can lead to excessive wear and tear on the equipment, resulting in increased maintenance and repair costs.
- Comfort: Properly sizing your FCU ensures that it can maintain the desired temperature and humidity levels consistently and evenly. This provides optimal comfort to the occupants and prevents health issues such as headaches and fatigue.
- Indoor Air Quality: Properly sized FCUs provide adequate ventilation and prevent the buildup of pollutants and moisture, which can lead to poor indoor air quality and health issues.
- Noise: An improperly sized FCU can result in excessive noise levels, which can be a nuisance to the occupants. Proper sizing ensures the FCU operates at a reasonable noise level, providing a comfortable environment.
In summary, selecting the right type and size of the fan coil unit is crucial to ensure energy efficiency, optimal comfort, good indoor air quality, and reduced noise levels. If you are still determining the correct size or type for your application, consulting with a professional HVAC contractor who can assess your specific needs and recommend the right FCU for your space is best.