ICC Commercial Mechanical Practice Exam

In a duct work system requiring both fire dampers and smoke dampers, what is a possible installation method?

1. Only fire dampers can be installed

2. Only smoke dampers can be installed

3. Combination fire/smoke dampers or separate dampers can be used

4. None of these

The correct answer is: Combination fire/smoke dampers or separate dampers can be used

The choice to use combination fire/smoke dampers or separate dampers reflects the need for both fire protection and smoke control within ductwork systems. Fire dampers are specifically designed to prevent the spread of flames through ductwork by automatically closing in the event of a fire. Smoke dampers, on the other hand, are intended to limit the movement of smoke within the building by controlling airflow during smoke events. Installation of combination fire/smoke dampers allows for a unified solution that addresses both concerns in a single device, simplifying installation and reducing the potential for gaps in fire or smoke protection. Alternatively, using separate fire dampers and smoke dampers allows for greater flexibility in design and installation, catering to specific fire codes and smoke control requirements. Each method has its advantages depending on the building's design and the relevant codes and standards. This combined approach or separate installation is an effective strategy to ensure that both fire and smoke risks are managed appropriately within the mechanical ventilation systems of commercial buildings.