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10 Best smoke carbon monoxide alarms of 2026

Explore top picks
  • Best Choice

    1

    First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 6-Pack
    First Alert
    Available in: 4 sizes
    9.9
    Exceptional

    First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 6-Pack

    • product dimensions: 5.6D x 5.6W x 1.9H
    • color: White
    • batteries: 1 9V batteries required. included
    • pattern: 2nd Generation
    • item weight: 3.33 pounds
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  • Value for Money

    2

    Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm, 5 inches, 30CUA10, 3 Pack
    Kidde
    Available in: 2 sizes
    9.8
    Exceptional

    Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm, 5 inches, 30CUA10, 3 Pack

  • 3

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 3-Pack
    First Alert
    Available in: 4 sizes
    9.5
    Excellent

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 3-Pack

  • 4

    X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display, Certified to UL 217 & 2034, Standalone Model SC07, 5-Pack
    X-Sense
    9.4
    Excellent

    X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display, Certified to UL 217 & 2034, Standalone Model SC07, 5-Pack

  • 5

    First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack
    First Alert
    Available in: 2 sizes
    9.3
    Excellent

    First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack

    • product dimensions: 21.5 x 7.5 x 3.5 inches
    • color: White
    • batteries: 2 AA batteries required. included
    • pattern: SMCO100
    • item weight: 1.55 pounds
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  • 6

    Kidde Smoke and Carbon Monoxide Detector, AA Battery Powered with LED Status Lights, 85 dB Alarm, 5 inches, 30CUDR, 3 Pack
    Kidde
    Available in: 2 sizes
    9.2
    Excellent

    Kidde Smoke and Carbon Monoxide Detector, AA Battery Powered with LED Status Lights, 85 dB Alarm, 5 inches, 30CUDR, 3 Pack

  • 7

    First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack
    First Alert
    Available in: 4 sizes
    9.1
    Excellent

    First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack

    • product dimensions:‎21.5 x 7.5 x 3.5 inches
    • color:‎White
    • batteries:‎1 9V batteries required. (included)
    • pattern:‎SMICO100-AC
    • item weight:‎1.68 pounds

  • 8

    Kidde Smoke and Carbon Monoxide Detector, Hardwired with AA Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm, 5 inches, 30CUAR, 3 Pack
    Kidde
    Available in: 2 sizes
    9.0
    Excellent

    Kidde Smoke and Carbon Monoxide Detector, Hardwired with AA Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm, 5 inches, 30CUAR, 3 Pack

  • 9

    FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3
    First Alert
    Available in: 4 sizes
    8.9
    Very Good

    FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3

    • product dimensions: 1.9D x 5.6W x 5.6H
    • color: White
    • batteries: 2 AA batteries required. included
    • pattern: Detector
    • item weight: 11.2 ounces

  • 10

    First Alert SC-9120B Hardwired Smoke and Carbon Monoxide Alarm with Battery Backup 2 Pack
    First Alert
    8.8
    Very Good

    First Alert SC-9120B Hardwired Smoke and Carbon Monoxide Alarm with Battery Backup 2 Pack

    • color: 2 Units Sc-9120b
    • batteries: 1 9V batteries required.
    • item weight: 1.34 pounds
    • upc: 716123248617
    • batteries included: No

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