Which HVAC system component is responsible for controlling airflow?

The blower fan and the diffuser both play crucial roles in controlling airflow within an HVAC system. The blower fan is responsible for generating the airflow by pushing air through the ductwork and into the living spaces. It actively moves the conditioned air, ensuring that it reaches all areas of a building effectively.

The diffuser, on the other hand, regulates the distribution of that air once it exits the ductwork. It helps direct the airflow into specific areas, ensuring an even distribution throughout a room and preventing drafts or cold spots. By manipulating the airflow pattern, diffusers can enhance the comfort level of occupants.

Together, these components allow for effective management of airflow, contributing to the overall efficiency and comfort of the HVAC system. Therefore, the combination of both the blower fan and the diffuser accurately represents the control of airflow in HVAC systems.