What is the maximum total area in square feet that can be served by one return in split-level structures?

In split-level structures, the maximum total area that can be effectively served by one return duct is defined by building codes and standards to ensure adequate air circulation and system efficiency. The correct answer of 1,600 square feet aligns with these standards, which are designed to optimize airflow and ensure comfortable temperature distribution throughout the space.

This area is determined based on factors such as the size of the ductwork, the layout of the space, and the expected airflow needs of the structure. A return duct serving too large of an area may lead to insufficient airflow, which can impact the heating and cooling efficiency of the system, potentially resulting in cold or hot spots within the home.

By adhering to this maximum area specification, HVAC systems can maintain better balance and performance, ensuring that conditioned air is distributed effectively in split-level designs where the layout can complicate airflow dynamics.