What is the recommended angle for ductwork to maintain optimal airflow?

The recommended angle for ductwork to maintain optimal airflow is 45 degrees because this angle strikes a balance between minimizing turbulence and maintaining efficient airflow. When ductwork changes direction, especially at angles greater than 45 degrees, the likelihood of airflow disruption increases, which can lead to increased static pressure and reduced overall efficiency within the HVAC system.

A 45-degree angle allows the airflow to turn more gradually, reducing the resistance that the air encounters. This helps to preserve the speed and volume of the air moving through the duct, thereby ensuring that the system operates efficiently. In contrast, steeper angles such as 90 degrees can create significant turbulence and pressure losses, which can negatively impact the distribution of air in the spaces being served by the ductwork.

Using angles like 30 degrees also may facilitate smoother airflow compared to steeper angles, but 45 degrees is often seen as the ideal compromise that balances airflow efficiency and installation practicality.