What is used to change the direction of ducts in an HVAC system?

The correct answer is that angle ducts are specifically designed to change the direction of airflow within an HVAC system. These ducts come at pre-fabricated angles, allowing for efficient redirection of air from one duct to another while minimizing air resistance and maintaining proper airflow dynamics.

Angle ducts serve an important role in the overall design and functionality of HVAC systems, as they help to facilitate airflow around obstacles and alter the trajectory of air to reach various parts of a building. This is essential for ensuring that heating or cooling is evenly distributed, improving comfort and energy efficiency.

While other types of ducts might serve specific purposes—flex ducts offer flexibility in installation and routing, transitional ducts assist in connecting different systems or duct sizes—angle ducts are specifically tailored for changing direction, making them the most appropriate choice in this context.