Best Smoke Alarm and Carbon Monoxide Detectors Updated May 2026

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Best Smoke Alarm and Carbon Monoxide Detectors
2026 Buyer's GuideUpdated May 2026
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1

10.0

Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, Voice Alerts, LED Status Lights, Interconnecte...
Installation
Quality
Battery life
Replacement

10.0

1
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, Voice Alerts, LED Status Lights, Interconnecte...
Installation
Quality
Battery life
Replacement

10.0

1
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, Voice Alerts, LED Status Lights, Interconnecte...
Installation
Quality
Battery life
Replacement
2

9.9

Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 1 Pack
Installation

9.9

2
Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 1 Pack
Installation

9.9

2
Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 1 Pack
Installation
3

9.6

First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack
Accuracy
Installation
Value for money
Loudness
Safety

9.6

3
First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack
Accuracy
Installation
Value for money
Loudness
Safety

9.6

3
First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack
Available in:  3 sizes
Accuracy
Installation
Value for money
Loudness
Safety
4

9.5

First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack
Ease of installation

9.5

4
First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack
Ease of installation

9.5

4
First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack
Ease of installation
5

9.3

Kidde Smoke and Carbon Monoxide Detector, AA Battery Powered with LED Status Lights, 85 dB Alarm, 5 inches, 30CUDR, 1 Pack
Installation
Quality
Value for money

9.3

5
Kidde Smoke and Carbon Monoxide Detector, AA Battery Powered with LED Status Lights, 85 dB Alarm, 5 inches, 30CUDR, 1 Pack
Installation
Quality
Value for money

9.3

5
Kidde Smoke and Carbon Monoxide Detector, AA Battery Powered with LED Status Lights, 85 dB Alarm, 5 inches, 30CUDR, 1 Pack
Available in:  2 styles 2 sizes
Installation
Quality
Value for money
6

9.1

First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pa...
Ease of installation
Functionality

9.1

6
First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pa...
Ease of installation
Functionality

9.1

6
First Alert BRK Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pa...
Ease of installation
Functionality
7

8.9

Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm...
Installation
Quality
Battery life

8.9

7
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm...
Installation
Quality
Battery life

8.9

7
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm...
Installation
Quality
Battery life
8

8.8

FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White
Installation
Functionality
Quality
Value for money
Replacement
Wired

8.8

8
FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White
Installation
Functionality
Quality
Value for money
Replacement
Wired

8.8

8
FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White
Installation
Functionality
Quality
Value for money
Replacement
Wired
9

8.7

First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack
Accuracy
Installation
Value for money
Loudness
Safety

8.7

9
First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack
Accuracy
Installation
Value for money
Loudness
Safety

8.7

9
First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack
Available in:  3 sizes
Accuracy
Installation
Value for money
Loudness
Safety
10

8.5

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

8.5

10
First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack
Replacement
Installation

8.5

10
First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack
Replacement
Installation

Our Top Choice

1

10.0

Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, Voice Alerts, LED Status Lights, Interconnecte...
Installation
Quality
Battery life
Replacement

10.0

1
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, Voice Alerts, LED Status Lights, Interconnecte...
Installation
Quality
Battery life
Replacement

10.0

1
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, Voice Alerts, LED Status Lights, Interconnecte...
Installation
Quality
Battery life
Replacement

Choosing between many options can be difficult. This guide compiles essential product details, feature comparisons, and up-to-date market data into a single, easy-to-scan view. Rankings are determined by performance factors, product popularity, and continuous analysis across available models, making it simple to compare and select the right fit. Results come from side-by-side comparisons within each category, highlighting the features that matter most. Rankings are refreshed regularly as new data and shopping trends evolve, helping surface strong-performing products and keep recommendations current.