What configuration is typically required for the transition from vertical to horizontal ducting?

The transition from vertical to horizontal ducting typically requires a smooth curve. This design is essential to maintain proper airflow and minimize turbulence within the duct system. A smooth curve allows air to change direction gradually, which helps to reduce friction loss and the potential for airflow stagnation that can occur with sharper bends.

Using a smooth curve instead of a right angle bend also helps prevent issues like increased noise levels and reduced efficiency in the ventilation system. Abrupt corners, on the other hand, can lead to increased resistance as they cause a sudden change in the airflow direction, resulting in potential pressure drops. While it might seem convenient to have "no specific configuration," using a smooth curve is the best engineering practice to ensure effective and efficient airflow in duct systems.