What is the relationship between duct diameter and airflow?

The relationship between duct diameter and airflow is significant, with larger diameter ducts allowing for higher airflow. When the diameter of a duct increases, the cross-sectional area also increases, which permits a greater volume of air to pass through it. This is due to the fact that with a larger area, air can travel more freely, reducing velocity and turbulence, which can lead to more efficient airflow.

Higher airflow through larger ducts is crucial for HVAC systems, especially when aiming to maintain comfort levels in larger spaces or dealing with higher heating and cooling demands. Consistent airflow is essential for proper system performance and energy efficiency.

In comparison, smaller diameter ducts can restrict airflow, potentially increasing pressure drop and leading to inefficiency in air distribution. This can cause imbalances in heating and cooling, affecting the comfort level in the space being served. Therefore, understanding the impact of duct diameter on airflow is vital for HVAC design and operation.