Which factor is essential for efficient duct system performance?

Efficient duct system performance relies significantly on proper sealing and insulation. When ducts are well-sealed, they prevent the escape of conditioned air, which enhances the overall efficiency of the HVAC system. Air leaks in the ductwork can significantly decrease system performance, leading to higher energy costs and uneven heating or cooling in different parts of a building.

Additionally, proper insulation around the ducts is crucial, especially if they run through unconditioned spaces such as attics or basements. Insulation minimizes heat transfer, allowing the air temperature to be maintained as it travels through the ducts, which further contributes to efficient heating or cooling.

While small duct sizes and minimal airflow resistance may seem beneficial, and having no thermal insulation can reduce upfront costs, these factors alone do not guarantee the efficient operation of the HVAC system. In fact, poor insulation might result in greater energy losses. Thus, focusing on sealing and insulating ductwork effectively is essential for maximizing system performance and ensuring energy efficiency.