Which standard must smoke alarms and detectors comply with to operate in normal environmental conditions?

• A. UL 198
• B. ANSI/UL 268
• C. NFPA 101
• D. IEEE 802.3

Answer: (B)

Smoke alarms and detectors must meet a tested performance standard to ensure they work reliably in everyday building environments. ANSI/UL 268, the Standard for Smoke Detectors for Fire Alarm Systems, defines how these devices should perform under normal environmental conditions, including their response to smoke, sensitivity, and overall reliability. Being listed to this standard means the detector has been evaluated and certified by Underwriters Laboratories for use in fire alarm systems, giving confidence it will operate as intended in typical temperature, humidity, and air conditions found in buildings.

Other options aren’t the performance standard for detectors: one is a life safety code about how systems are installed and maintained, another is a networking standard, and the remaining option isn’t the standard used for smoke detector performance.