ICC Commercial Mechanical Practice Exam

In commercial applications, ductwork is essential for the distribution of heating, ventilation, and air conditioning (HVAC) systems. The most widely recognized materials for constructing ductwork are sheet metal and flexible ducting.

Sheet metal, typically made from galvanized steel or aluminum, is favored for its durability, strength, and resistance to air leakage. It allows for efficient airflow and is capable of handling high pressures that might be present in larger commercial systems. Additionally, sheet metal can be easily shaped and customized to fit specific architectural designs and performance requirements.

Flexible ducting, on the other hand, provides versatility in installation, particularly in spaces where rigid ductwork is impractical. This material is made from a combination of a core and insulation, often associated with lower costs and easier installation in tight or irregular spaces. It can expand and contract, allowing for more flexibility in routing within a building.

Overall, the combination of these materials enables efficient airflow, minimizes energy loss, and accommodates a variety of building designs and heating and cooling needs.