Which statement best describes a characteristic of air sampling detection systems (ASD)?

• A. It draws air through detectors via a network of tubes to detect very low smoke levels.
• B. It relies on fixed, ceiling-mounted spot detectors only.
• C. It cannot be used in data centers.
• D. It operates only with manual testing.

Answer: (A)

Air sampling detection systems work by actively drawing air from the protected space through a network of small-diameter tubes to the detector. This aspirating approach allows the system to sense smoke at very low levels, long before it would trigger a traditional ceiling-mounted detector. Because air from many locations is continuously sampled, ASD provides early, distributed detection and is especially effective in large, high-traffic, or mechanically complex spaces such as data centers. That description matches how ASD functions: air is pulled through a network of tubes to detect very low smoke levels.

Relying only on fixed ceiling spot detectors isn’t what ASD does. And ASD isn’t unsuitable for data centers or limited to manual testing—these systems operate automatically, continuously sampling air and alerting when smoke is detected.