The total area for ducts should not exceed what measurement for every 100 square feet of floor area?

The correct response is grounded in the guidelines established within the North Carolina Mechanical Code, which stipulates that the total area for ducts serving a specific floor area should not exceed a designated measurement for effective and efficient ventilation.

In this case, the standard establishes that for every 100 square feet of floor area, the duct area should not exceed 100 square inches. This requirement is aimed at ensuring that there is sufficient airflow throughout the space without causing excessive pressure drops or reducing the duct system's overall efficiency.

Maintaining this standard is crucial for optimizing HVAC system performance, promoting air circulation, and complying with safety and design regulations. Adhering to these measurements also aids in preventing common issues such as inadequate heating or cooling, which could arise from improperly sized ductwork.

In summary, the 100 square inches allocation per 100 square feet of floor area is both a practical and regulatory guideline intended to facilitate effective air distribution and maintain system efficiency.