Which factor should be considered when determining detector sensitivity in a space?

• A. Proximity to water lines.
• B. Occupancy and airflow.
• C. Exterior weather.
• D. Noise level of alarm.

Answer: (B)

Understanding detector sensitivity comes down to how the space is used and how air moves dentro. If a space has more people or activities that generate smoke or heat, detectors should respond quickly to protect occupants, while still avoiding nuisance alarms. Airflow patterns from HVAC, vents, and drafts change how smoke travels and dilutes, so in spaces with high air movement you may need a more appropriate sensitivity level or strategic placement to catch a fire promptly without false alarms. Proximity to water lines, exterior weather, or the alarm’s loudness don’t directly set the sensing threshold—those factors affect other aspects (maintenance, outdoor conditions, or notification), not how the detector detects smoke.