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10 Best first alert smoke detectors of 2026

Save up to 28% off
  • Best Choice

    1

    First Alert Smoke Alarm, Interconnect Hardwire Detector with 10-Year Battery Backup, SMI105-AC, 6-Pack
    First Alert
    9.8
    Exceptional

    First Alert Smoke Alarm, Interconnect Hardwire Detector with 10-Year Battery Backup, SMI105-AC, 6-Pack

  • Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you
    Careful review Our team ensures quality, value, and fit based on real user feedback
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    • Thousands of users trust our site daily
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  • Value for Money

    2

    First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm, SMCO600NV, 1-Pack
    First Alert
    9.7
    Exceptional

    First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm, SMCO600NV, 1-Pack

    14% Off

  • 3

    BRK First Alert SMI100, Battery-Operated Smoke Alarm, 3-Pack
    First Alert
    9.5
    Excellent

    BRK First Alert SMI100, Battery-Operated Smoke Alarm, 3-Pack

    • product dimensions:‎5.6 x 5.6 x 1.9 inches
    • color:‎White
    • batteries:‎1 9V batteries required. (included)
    • item weight:‎9.6 ounces
    • pattern:‎SMI100

  • 4

    First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 6-Pack
    First Alert
    9.2
    Excellent

    First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 6-Pack

  • 5

    First Alert 9120B 120 Volt Hardwired Smoke Alarm With Battery Back Up 5 Pack
    First Alert
    8.9
    Very Good

    First Alert 9120B 120 Volt Hardwired Smoke Alarm With Battery Back Up 5 Pack

    • product dimensions:N/A
    • color: 5 Units 9120B
    • batteries:N/A
    • item weight: 0.01 ounces
    • pattern:N/A
  • See Today’s Deals & Prices

  • 6

    First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 3-Pack
    First Alert
    8.7
    Very Good

    First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 3-Pack

    28% Off

  • 7

    First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup
    First Alert
    8.5
    Good

    First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup

    • color: WHITE
    • usage: Indoor use only
    • batteries included: No
    • item model number: SC9120B
    • best sellers rank: 1,778 in Tools & Home Improvement See Top 100 in Tools & Home Improvement 4 in Smoke & Carbon Monoxide Alarms

  • 8

    First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack
    First Alert
    8.2
    Good

    First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack

    23% Off
    • color:‎White
    • usage:N/A
    • batteries included:‎Yes
    • item model number:‎SMICO100-AC
    • best sellers rank:#305 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #1 in Smoke & Carbon Monoxide Alarms

  • 9

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White
    First Alert
    8.1
    Good

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White

    • color:‎White
    • usage:N/A
    • batteries included:‎Yes
    • item model number:‎SMCO100
    • best sellers rank:#1,255 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #3 in Smoke & Carbon Monoxide Alarms

  • 10

    FIRST ALERT SC9120B Corded Electric Combination Alarm with Adapter Plugs for Easy Replacement
    First Alert
    7.9
    Good

    FIRST ALERT SC9120B Corded Electric Combination Alarm with Adapter Plugs for Easy Replacement

    • color: Red
    • usage:N/A
    • batteries included: Yes
    • item model number: SC9120B
    • best sellers rank: 24,384 in Tools & Home Improvement See Top 100 in Tools & Home Improvement 51 in Smoke & Carbon Monoxide Alarms

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