First Alert Combination Smoke & Carbon Monoxide Alarm
The SMICO100 is a robust option for homeowners who prefer hardwired alarms with backup power and interconnect functionality. For larger homes, interconnect capability greatly improves safety by ensuring all units alert together. Just be prepared for installation effort and wiring checks.
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Description
SMICO100 AC Interconnect Smoke + CO Combination Detector
The SMICO100 is a hardwired smoke and carbon monoxide (CO) combination alarm with interconnect capability, making it a solid option for whole-home safety systems.
Key Features
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Hardwired with Battery Backup: Plugs into home AC wiring and includes a backup battery so it continues operating during power outages
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Dual Detection: Combines a photoelectric smoke sensor and an electrochemical CO sensor in one device
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Interconnect Capability: When one alarm triggers, all linked units’ alarms are simultaneously
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Test / Silence Button: Lets you test the unit or silence nuisance alarms temporarily
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Voice & LED Alerts: Distinguishes between smoke vs. CO events via specific alerts
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Easy Mounting: Standard mount for ceiling or wall installation
Pros
✔ Continues working during power failures (due to battery backup)
✔ Full home protection with interconnected alarms
✔ Dual hazard detection in a single unit
✔ Clear differentiation between smoke vs CO events
Cons
✖ Needs to be wired into home wiring — installation may require an electrician
✖ If interconnect wiring is faulty, one unit’s issue may affect others
✖ More complex setup than standalone battery alarms
