What happens to supply airflow using a PSC blower motor when adding a ducted return?

When adding a ducted return to a system that utilizes a Permanent Split Capacitor (PSC) blower motor, it typically results in increased airflow. This enhancement is largely due to the fact that a ducted return helps to create a balanced system by improving the overall air circulation. The introduction of a return duct allows for more efficient air handling, facilitating better airflow patterns within the system.

With a well-designed ducted return, the blower is able to draw in air more effectively from the living space, which enhances the amount of conditioned air that is delivered through the supply ducts. Consequently, this leads to increased air volume delivered into the space being conditioned, thereby improving temperature regulation and comfort levels.

In contrast to situations where there may be restrictions or insufficient return pathways, a ducted return reduces potential static pressure buildup, which can obstruct airflow. Thus, in this scenario with a PSC blower motor, the increased efficiency in air handling from the ducted return positively contributes to the rise in supply airflow.