What is typically the main reason for using a larger centerline radius in ductwork fabrication?

Using a larger centerline radius in ductwork fabrication is primarily aimed at improving airflow. When air flows through a duct, sharp bends or tight radii can create turbulence, which can disrupt the smooth flow of air. This turbulence increases resistance and can lead to inefficiencies in the system. By using a larger centerline radius, the airflow becomes more streamlined, thereby reducing friction and turbulence. This allows air to move more freely through the ductwork, enhancing the overall efficiency of the HVAC system. Improved airflow contributes to better performance in heating and cooling, leading to a more comfortable environment and potentially lower energy costs over time.

The other options, while they may seem relevant, do not address the fundamental goal of using a larger radius as effectively as improving airflow does. For instance, while a larger radius might help with installation aspects or reduce pressure drop, the primary impact and intent behind the radius choice is related to airflow efficiency.