First Alert SMI100-AC Hardwire Interconnect Smoke Alarm

Product Description

The FIRST ALERT SMI100-AC is a hardwire interconnect smoke alarm with battery backup, designed for residential installation by licensed electricians and qualified fire-safety contractors. It uses First Alert Precision Detection advanced sensing technology, which meets current industry standards for reduced cooking nuisance alarms while maintaining early fire detection performance. The Quick Connect Plug allows direct replacement of existing hardwire alarms without rewiring. At 0.60 pounds and measuring 5.59 inches by 5.59 inches by 1.89 inches, the unit fits standard ceiling and wall junction boxes used in residential construction.

The SMI100-AC is intended for residential applications where a hardwire smoke detection system is required or desired. It is suited for new construction and retrofit installations alike. When interconnected with compatible alarms, the system provides whole-home coverage: if one unit detects smoke, all interconnected alarms sound simultaneously. The battery backup ensures continuous protection during power outages, making it appropriate for bedrooms, hallways, living areas, and other locations specified under residential fire codes.

Key Features

• Precision Detection advanced sensing technology reduces cooking nuisance alarms while preserving early fire warning capability
• Hardwire interconnect: when one alarm triggers, all compatible interconnected alarms sound
• Battery backup maintains protection during AC power interruptions
• Alarm indicator light identifies the specific unit that initiated the alarm
• Quick Connect Plug included for direct replacement with no rewiring required
• Compact profile at 5.59 inches by 5.59 inches by 1.89 inches fits standard residential junction boxes

Compatibility

Designed as a hardwire interconnect smoke alarm compatible with other First Alert interconnect-compatible alarms for whole-home system integration. Check the product documentation to confirm interconnect compatibility with existing alarms before installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NFPA 72 and applicable local building and fire codes. Shut off the circuit breaker supplying power to the alarm circuit before making any wiring connections. The included Quick Connect Plug is designed for direct replacement of existing hardwire alarms; confirm the existing wiring harness is compatible before proceeding. Test all interconnected alarms after installation to verify proper system operation.