How can poorly insulated ducts impact HVAC performance?

Poorly insulated ducts can significantly impact HVAC performance primarily by leading to energy loss. When ducts are not properly insulated, they allow conditioned air (either heated or cooled) to escape into unconditioned spaces, such as attics or walls. This results in the HVAC system working harder to maintain the desired indoor temperature, thereby consuming more energy. As the air temperature changes while traveling through these ducts, the system must compensate by drawing more energy, leading to increased utility bills and potentially shortening the lifespan of the HVAC equipment due to overexertion.

In contrast to the correct answer, the other options do not accurately reflect the primary impact of poorly insulated ducts. While they may contribute to sound issues, enhance airflow efficiency, or affect cooling effects in specific contexts, the critical concern relates to the efficiency and economy of energy use in the heating and cooling processes.