The operational test of a combination fire/smoke damper is done under which airflow conditions?

The operational test of a combination fire/smoke damper is done under which airflow conditions?

• A. Only static airflow conditions
• B. Only normal HVAC airflow conditions
• C. Normal and static airflow conditions
• D. Uncontrolled airflow conditions

Answer: (C)

The operational test of a combination fire/smoke damper is conducted under both normal and static airflow conditions to ensure that the damper can function effectively in different scenarios it may encounter in an actual fire or smoke situation. Testing under normal HVAC airflow conditions verifies that the damper operates correctly as part of the building's standard ventilation system. In contrast, testing under static airflow conditions is important because it simulates a situation where there is no airflow, which can occur during a fire when fans may be turned off or air pressure changes. This ensures that the damper can fully close and seal off the duct, preventing the spread of smoke and fire. This dual testing approach is mandated by the relevant standards to ensure that the damper meets the performance requirements essential for life safety and property protection. It guarantees that the damper will behave predictably and effectively regardless of the airflow status during a fire event.

The operational test of a combination fire/smoke damper is conducted under both normal and static airflow conditions to ensure that the damper can function effectively in different scenarios it may encounter in an actual fire or smoke situation.

Testing under normal HVAC airflow conditions verifies that the damper operates correctly as part of the building's standard ventilation system. In contrast, testing under static airflow conditions is important because it simulates a situation where there is no airflow, which can occur during a fire when fans may be turned off or air pressure changes. This ensures that the damper can fully close and seal off the duct, preventing the spread of smoke and fire.

This dual testing approach is mandated by the relevant standards to ensure that the damper meets the performance requirements essential for life safety and property protection. It guarantees that the damper will behave predictably and effectively regardless of the airflow status during a fire event.