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First Alert SMI100-AC Hardwire Smoke Alarm

First Alert SMI100-AC Hardwire Smoke Alarm

First Alert

First Alert SMI100-AC Hardwire Smoke Alarm

4.5

Best reliable hardwired protection for homeowners seeking a low profile design.

This is the set-it-and-forget-it essential for home safety. By hardwiring directly into your electrical system, it eliminates the anxiety of dead batteries, though you sacrifice the convenience of modern smart alerts. It is a refreshingly analog solution for those who prioritize reliable, consistent protection over app connectivity.

$19.47

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Detection Technology

Dual Sensor Ionization Photoelectric

Power Source Hardwired with Battery Backup

Battery Operated

Hardwired with Battery Backup

Hardwired, Battery Operated

Connectivity Type Standalone

Hardwired Interconnected

Standalone

Interconnectivity Type

Hardwired Interconnect None

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Who it's for

Homeowners seeking a discreet safety device that blends into ceilings
DIYers looking for a quick and hassle-free setup process
Families living in multi-story homes requiring comprehensive safety coverage

Who should skip it

Cooks who frequently sear food or have poorly ventilated kitchens
Busy individuals who prefer maintenance-free devices with long-life batteries
Renters or owners in older homes without dedicated hardwired connections

Performance breakdown

Reliability

Hardwired connection ensures constant power without relying solely on battery life.

Excellent

Installation Complexity

Requires electrical wiring knowledge, making it less accessible for casual DIYers.

Good

Maintenance Ease

Simple design makes periodic testing and battery swaps quick and straightforward.

Excellent

Aesthetic Integration

Neutral white finish blends unobtrusively into standard residential ceiling environments.

Good

Feature Set

Focused purely on core detection, lacking modern smart home connectivity features.

Average

Emergency Preparedness

Battery backup provides critical peace of mind during unexpected power outages.

Excellent

Key Specs

Power Source

Hardwired with battery backup

Connectivity Type

Standalone

Color

White

Model

SMI100-AC

Battery Included

No

Smart Home Compatibility

No

Carbon Monoxide Detection

No

Know before you buy

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First Alert SMI100-AC Hardwire Smoke Alarm

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