What is one effect of improper duct design?

Improper duct design can lead to increased energy costs primarily because it may result in inefficient airflow and an imbalance within the HVAC system. When ducts are poorly designed, they can create restrictions or leaks that prevent air from flowing effectively to the intended spaces. This often forces the heating or cooling system to work harder than necessary to maintain comfortable indoor temperatures, thereby consuming more energy and driving up utility bills. An efficient duct system is crucial for maintaining proper airflow and distribution, which ultimately impacts energy consumption and operational cost.

The other responses, while positive implications, do not align with the realities of improper duct design. Enhanced airflow quality and improved system longevity typically result from well-designed systems, which promote optimal performance and reduce wear and tear. Similarly, less maintenance requirement tends to be linked to well-planned and executed ductwork that minimizes issues such as blockages or airflow problems, rather than the lack of attention to duct design.