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First Alert

First Alert SMICO100-AC Hardwired Smoke and CO Detector

  • Hardwired with battery backup
  • Ionization smoke sensor
  • Smoke and carbon monoxide detection
  • 10 year limited warranty
  • 1 detector, 11.2 oz

Updated 22 days ago · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A basic hardwired combo alarm for homes replacing First Alert units on existing wiring. The listing is thin: no interconnect, battery type, voice or certification details.

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ASIN: B0CV55KHHKModel: SMICO100-ACCategory: Smoke Detectors & Fire Alarms

Overview

Wiring this First Alert detector into a ceiling box adds smoke and carbon monoxide alerts on household power, with a backup battery for outages. Smoke is sensed by an ionization chamber, which reacts to the small particles of fast flaming fires.

Combining smoke and CO in one hardwired unit saves a ceiling spot and a separate CO plug-in. Almost every detail buyers compare, from interconnect to backup battery type, is missing from the listing.

Who it's for

Homes with existing alarm wiring that want CO coverage added at the same ceiling locations. Buyers who need confirmed interconnect or certification data will find too little here.

Pros and cons

Pros
  • Smoke and CO in one device
  • Runs on household power
  • Battery backup for outages
  • Long limited warranty
Cons
  • Interconnect and battery type not listed
  • Ionization sensor only for smoke
  • Needs existing wiring

Performance notes

An ionization chamber responds fastest to flaming fires with small particles and is more prone to cooking nuisance alarms. The backup battery carries detection through power cuts for a period the listing does not state.

Specifications

BrandFirst Alert
ModelSMICO100-AC
Dimensions & fit
Item Dimensions D X W X H9"D x 4"W x 7"H
Item weight11.2 ounces
Power & efficiency
Power SourceHardwired with battery backup
Construction & materials
ColorNo Color
Warranty & support
Manufacturer Warranty Description10 Years Limited
Other details
Sensor TypeIonization
AlarmSmoke and carbon monoxide
Number Of Items1
Product Stylehardwired smoke alarm

Frequently asked questions

Will the First Alert SMICO100-AC plug into my existing alarm harness?

The listing does not describe the wiring connector or interconnect. Check your current harness against the user guide before buying.

What smoke sensor does the First Alert SMICO100-AC use?

An ionization sensor.

What warranty covers the First Alert SMICO100-AC?

A 10 year limited warranty.