Best Smoke and Carbon Monoxide Alarms Updated February 2026
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Best Smoke and Carbon Monoxide Alarms
2026 Buyer's GuideUpdated February 2026
Advertiser disclosure About our rankings
Sort by:
Best Overall
1

9.9

X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Va...
Ease of use
Quality
Ease of installation
Size
Portable
Value for money
100+ bought in past month
Best Overall

9.9

1
X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Va...
Ease of use
Quality
Ease of installation
Size
Portable
Value for money
100+ bought in past month
Best Overall

9.9

1
X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Va...
Available in:  4 styles
Ease of use
Quality
Ease of installation
Size
Portable
Value for money
100+ bought in past month
2

9.7

2 Packs, 2 in 1 CO & Smoke Detectors,Carbon Monoxide Detectors,Smoke Detector Battery Powered,（Include 3 * 1.5V AA Battery）,85 ...
Ease of installation
Quality
Functionality
Value for money
Mounting hardware
Noise level

9.7

2
2 Packs, 2 in 1 CO & Smoke Detectors,Carbon Monoxide Detectors,Smoke Detector Battery Powered,（Include 3 * 1.5V AA Battery）,85 ...
Ease of installation
Quality
Functionality
Value for money
Mounting hardware
Noise level

9.7

2
2 Packs, 2 in 1 CO & Smoke Detectors,Carbon Monoxide Detectors,Smoke Detector Battery Powered,（Include 3 * 1.5V AA Battery）,85 ...
Available in:  3 sizes
Ease of installation
Quality
Functionality
Value for money
Mounting hardware
Noise level
3

9.6

6 Packs, 2 in 1,Smoke Carbon Monoxide Detector,Carbon Monoxide Detectors/Smoke Alarm,85 dB Alarm,Large Screen Readout,Test Butt...
Ease of installation
Quality
Functionality
Value for money
Mounting hardware
Noise level

9.6

3
6 Packs, 2 in 1,Smoke Carbon Monoxide Detector,Carbon Monoxide Detectors/Smoke Alarm,85 dB Alarm,Large Screen Readout,Test Butt...
Ease of installation
Quality
Functionality
Value for money
Mounting hardware
Noise level

9.6

3
6 Packs, 2 in 1,Smoke Carbon Monoxide Detector,Carbon Monoxide Detectors/Smoke Alarm,85 dB Alarm,Large Screen Readout,Test Butt...
Available in:  3 sizes
Ease of installation
Quality
Functionality
Value for money
Mounting hardware
Noise level
4

9.4

5 Packs,Smoke Detector Carbon Monoxide Detector Combo,2-in-1 Detection,85 dB Alarm,LED Indication,LCD Digital Displays,Battery ...
Smoke detector quality
Value for money
Ease of installation

9.4

4
5 Packs,Smoke Detector Carbon Monoxide Detector Combo,2-in-1 Detection,85 dB Alarm,LED Indication,LCD Digital Displays,Battery ...
Smoke detector quality
Value for money
Ease of installation

9.4

4
5 Packs,Smoke Detector Carbon Monoxide Detector Combo,2-in-1 Detection,85 dB Alarm,LED Indication,LCD Digital Displays,Battery ...
Available in:  4 sizes
Smoke detector quality
Value for money
Ease of installation
5

9.3

4 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Travel Portable Photoelectric Fire&Co Alarm for Home, K...
Ease of installation
Value for money
Smoke detector quality
Battery life
Noise level
Save 19%

9.3

5
4 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Travel Portable Photoelectric Fire&Co Alarm for Home, K...
Ease of installation
Value for money
Smoke detector quality
Battery life
Noise level
Save 19%

9.3

5
4 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Travel Portable Photoelectric Fire&Co Alarm for Home, K...
Ease of installation
Value for money
Smoke detector quality
Battery life
Noise level
Save 19%
Popular
6

9.1

Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators, 30CUD10
Ease of installation
Quality
Safety
Read Full Review
Save 15%
Popular

9.1

6
Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators, 30CUD10
Ease of installation
Quality
Safety
Save 15%
Read Full Review
Popular

9.1

6
Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators, 30CUD10
Available in:  4 sizes ,  2 options
Read Full Review
Ease of installation
Quality
Safety
Save 15%
7

9.0

4 Packs Smoke & Carbon Monoxide Detector Battery Operated,2-in-1 Smoke Detector Carbon Monoxide Detector Combo,Smoke Alarm with...
Ease of installation
Functionality
Quality
Value for money
Battery capacity

9.0

7
4 Packs Smoke & Carbon Monoxide Detector Battery Operated,2-in-1 Smoke Detector Carbon Monoxide Detector Combo,Smoke Alarm with...
Ease of installation
Functionality
Quality
Value for money
Battery capacity

9.0

7
4 Packs Smoke & Carbon Monoxide Detector Battery Operated,2-in-1 Smoke Detector Carbon Monoxide Detector Combo,Smoke Alarm with...
Available in:  2 sizes
Ease of installation
Functionality
Quality
Value for money
Battery capacity
Best Value
8

8.9

2Packs, Smoke and Carbon Monoxide Detector, LCD Digital Display, 2 in 1 Technology, Easy to Use, 85db Alarm, for Home and Kitch...
Functionality
Smoke detector quality
Ease of installation
Value for money
Detection accuracy
Battery life
Best Value

8.9

8
2Packs, Smoke and Carbon Monoxide Detector, LCD Digital Display, 2 in 1 Technology, Easy to Use, 85db Alarm, for Home and Kitch...
Functionality
Smoke detector quality
Ease of installation
Value for money
Detection accuracy
Battery life
Best Value

8.9

8
2Packs, Smoke and Carbon Monoxide Detector, LCD Digital Display, 2 in 1 Technology, Easy to Use, 85db Alarm, for Home and Kitch...
Available in:  3 colors
Functionality
Smoke detector quality
Ease of installation
Value for money
Detection accuracy
Battery life
9

8.8

Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators...
Ease of installation
Smoke detector quality
Quality

8.8

9
Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators...
Ease of installation
Smoke detector quality
Quality

8.8

9
Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators...
Available in:  2 styles ,  3 sizes
Ease of installation
Smoke detector quality
Quality
Premium Pick
10

8.6

First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack
Ease of installation
Quality
Value for money
Premium Pick

8.6

10
First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack
Ease of installation
Quality
Value for money
Premium Pick

8.6

10
First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack
Available in:  2 styles ,  2 sizes ,  2 options
Ease of installation
Quality
Value for money

Our Top Choice

Best Overall
1

9.9

X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Va...
Ease of use
Quality
Ease of installation
Size
Portable
Value for money
100+ bought in past month
Best Overall

9.9

1
X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Va...
Ease of use
Quality
Ease of installation
Size
Portable
Value for money
100+ bought in past month
Best Overall

9.9

1
X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Va...
Available in:  4 styles
Ease of use
Quality
Ease of installation
Size
Portable
Value for money
100+ bought in past month
Related Categories
Smoke Alarm and Carbon Monoxide DetectorCarbon and Smoke DetectorSmoke Detector Co2 ComboCombined Smoke and Carbon Monoxide AlarmSmoke Detector & Carbon Monoxide Detector ComboSmoke Alarm
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Related Categories
Smoke Alarm and Carbon Monoxide DetectorCarbon and Smoke DetectorSmoke Detector Co2 ComboCombined Smoke and Carbon Monoxide AlarmSmoke Detector & Carbon Monoxide Detector ComboSmoke Alarm
Related Categories
Smoke Alarm and Carbon Monoxide DetectorCarbon and Smoke DetectorSmoke Detector Co2 ComboCombined Smoke and Carbon Monoxide AlarmSmoke Detector & Carbon Monoxide Detector ComboSmoke Alarm