What is a disadvantage of oversized ducts in HVAC systems?

Oversized ducts in HVAC systems can lead to lower airflow efficiency because they can disrupt the intended balance of air distribution. When ducts are larger than necessary, the air can move through them at a reduced velocity, which reduces the effectiveness of the system. This can cause inadequate mixing of air in a space, leading to uneven temperature distribution and discomfort.

In addition, larger ducts might not be able to maintain proper static pressure, which is essential for efficient airflow. This can result in an increased load on the HVAC system as it struggles to deliver air at the desired rate, leading to inefficiencies in energy consumption.

While other factors such as noise, air leaks, and humidity control are also affected by duct sizing, the main issue with oversized ducts is their impact on airflow efficiency, which can compromise the overall performance of the HVAC system.