Public Safety Notice: Smoke & Carbon Monoxide Alarms

Published on February 11, 2026

The Manchester Fire Marshal’s Office has been finding numerous non-listed smoke alarms in the community, particularly in residential occupancies. Some of these devices—often purchased online—are fraudulently advertised as “manufactured to UL standards” but are not actually UL or ETL listed.

There are documented incidents of non-listed smoke and carbon monoxide alarms failing to operate when needed. Because these devices are not independently tested or certified, their reliability cannot be trusted during a fire or carbon monoxide emergency.

What residents should look for:

• A genuine UL or ETL listing mark on the alarm and packaging
• Devices that only claim to “meet UL standards” without a recognized listing
• If the cost is significantly lower, it is most likely non-listed

Your safety depends on tested and certified alarms. If you are unsure whether your alarm is listed, replace it. Please contact the Manchester Fire Marshal’s Office for guidance.