Design: The first step in air duct installation is to design the ductwork system. This involves determining the size and layout of the ducts based on factors such as the building’s size, HVAC system capacity, and the desired  airflow in each room.

Material Selection: Choose the appropriate materials for the ducts. Common materials include sheet metal (galvanized steel), fiberglass duct board, flexible ducts, and rigid fiberglass ducts. The choice of material depends on factors like cost, system requirements, and local building codes.

Sizing: Calculate the proper size of the ducts to ensure adequate airflow. Oversized or undersized ducts can lead to inefficiency and discomfort.