When testing fire/smoke dampers in a variable air volume (VAV) system, what percentage of air flow is required?

When testing fire/smoke dampers in a variable air volume (VAV) system, what percentage of air flow is required?

• A. 50%
• B. 75%
• C. 100%
• D. 125%

Answer: (C)

In the context of testing fire/smoke dampers within a variable air volume (VAV) system, the requirement is to conduct the test with the damper in the fully open position, ensuring that the system operates at its maximum capacity. Testing at 100% airflow is essential for accurately evaluating the damper's performance under conditions that closely simulate real-life scenarios in a fire event. This level of airflow allows for the assessment of how effectively the dampers close, as it ensures that any potential issues with excessive smoke or heat escape can be detected under maximum operational stress. By testing at full airflow, inspectors can confirm that the damper will function correctly during emergencies when the system is likely to encounter peak demand. This aligns with NFPA standards, which emphasize the importance of ensuring that all fire and smoke dampers will perform as expected in the event of fire, prioritizing occupant safety and property protection.

In the context of testing fire/smoke dampers within a variable air volume (VAV) system, the requirement is to conduct the test with the damper in the fully open position, ensuring that the system operates at its maximum capacity. Testing at 100% airflow is essential for accurately evaluating the damper's performance under conditions that closely simulate real-life scenarios in a fire event. This level of airflow allows for the assessment of how effectively the dampers close, as it ensures that any potential issues with excessive smoke or heat escape can be detected under maximum operational stress.

By testing at full airflow, inspectors can confirm that the damper will function correctly during emergencies when the system is likely to encounter peak demand. This aligns with NFPA standards, which emphasize the importance of ensuring that all fire and smoke dampers will perform as expected in the event of fire, prioritizing occupant safety and property protection.