What is the primary function of an electric fan in HVAC systems?

The primary function of an electric fan in HVAC systems is to move air across coils for heating or cooling. This movement of air is crucial because it facilitates the effective transfer of heat between the air and the coils, which either absorb heat to cool the air or release heat to warm it. Proper air circulation helps maintain consistent temperatures throughout the space being conditioned and ensures that the system operates efficiently.

While regulating temperature, filtering air particles, and humidifying the air are important aspects of HVAC systems, they are not the primary functions of the electric fan itself. Instead, these functions are accomplished through other components of the HVAC system. For instance, the thermostat is responsible for regulating temperature, air filters are used to clean the air, and humidifiers are separate devices designed to add moisture to the air. The fan's main role is to ensure that air is efficiently moved through the system to enhance heating or cooling performance.