Best Smoke Detector Co2 Combos Updated February 2026
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Best Smoke Detector Co2 Combos
2026 Buyer's GuideUpdated February 2026
Advertiser disclosure About our rankings
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Best Smoke Detector Co2 Combo
1

9.9

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
1K+ bought in past month
Best Smoke Detector Co2 Combo

9.9

1
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
1K+ bought in past month
Best Smoke Detector Co2 Combo

9.9

1
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
1K+ bought in past month
2

9.8

4-Pack,Smoke and Carbon Monoxide Detector,2 in 1 CO & Smoke Alarm,Carbon Monoxide Detectors,Smoke Detector,85dB in Alarm,LCD Sc...
Smoke detector quality
Ease of installation
Value for money
Size
Save 24%

9.8

2
4-Pack,Smoke and Carbon Monoxide Detector,2 in 1 CO & Smoke Alarm,Carbon Monoxide Detectors,Smoke Detector,85dB in Alarm,LCD Sc...
Smoke detector quality
Ease of installation
Value for money
Size
Save 24%

9.8

2
4-Pack,Smoke and Carbon Monoxide Detector,2 in 1 CO & Smoke Alarm,Carbon Monoxide Detectors,Smoke Detector,85dB in Alarm,LCD Sc...
Available in:  2 colors
Smoke detector quality
Ease of installation
Value for money
Size
Save 24%
Popular
3

9.6

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

9.6

3
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

9.6

3
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%
4

9.5

6 Packs,2 in 1 Technology, Smoke,Carbon Monoxide Detector, Co Alarm,85db Alert,LCD Readout,3 Color LED Indication,(Green Light ...
Smoke detector quality
Value for money
Ease of installation

9.5

4
6 Packs,2 in 1 Technology, Smoke,Carbon Monoxide Detector, Co Alarm,85db Alert,LCD Readout,3 Color LED Indication,(Green Light ...
Smoke detector quality
Value for money
Ease of installation

9.5

4
6 Packs,2 in 1 Technology, Smoke,Carbon Monoxide Detector, Co Alarm,85db Alert,LCD Readout,3 Color LED Indication,(Green Light ...
Available in:  4 sizes
Smoke detector quality
Value for money
Ease of installation
5

9.4

4-Pack, Smoke and Carbon Monoxide Detector, Smoke Detector Carbon Monoxide Detector Combo with Test Button, Digital Display, 85...
Ease of installation
Functionality
Smoke detector quality
Security
Value for money
Sound quality

9.4

5
4-Pack, Smoke and Carbon Monoxide Detector, Smoke Detector Carbon Monoxide Detector Combo with Test Button, Digital Display, 85...
Ease of installation
Functionality
Smoke detector quality
Security
Value for money
Sound quality

9.4

5
4-Pack, Smoke and Carbon Monoxide Detector, Smoke Detector Carbon Monoxide Detector Combo with Test Button, Digital Display, 85...
Available in:  2 styles ,  3 sizes
Ease of installation
Functionality
Smoke detector quality
Security
Value for money
Sound quality
Best Value
6

9.3

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

9.3

6
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

9.3

6
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
7

9.1

Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Voice Alerts, Interconnectable LED Warning Light Indi...
Ease of installation
Smoke detector quality
Battery life
Replacement value
Read Full Review
Save 18%

9.1

7
Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Voice Alerts, Interconnectable LED Warning Light Indi...
Ease of installation
Smoke detector quality
Battery life
Replacement value
Save 18%
Read Full Review

9.1

7
Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Voice Alerts, Interconnectable LED Warning Light Indi...
Available in:  2 sizes
Read Full Review
Ease of installation
Smoke detector quality
Battery life
Replacement value
Save 18%
Premium Pick
8

8.8

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

8.8

8
First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack
Ease of installation
Quality
Value for money
Premium Pick

8.8

8
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
9

8.1

First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,Wh...
Ease of installation
Quality
Value for money

8.1

9
First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,Wh...
Ease of installation
Quality
Value for money

8.1

9
First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,Wh...
Available in:  2 styles ,  2 sizes ,  2 options
Ease of installation
Quality
Value for money
10

7.8

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

7.8

10
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

7.8

10
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

Our Top Choice

Best Smoke Detector Co2 Combo
1

9.9

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
1K+ bought in past month
Best Smoke Detector Co2 Combo

9.9

1
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
1K+ bought in past month
Best Smoke Detector Co2 Combo

9.9

1
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
1K+ bought in past month
Related Categories
Smoke Alarm and Carbon Monoxide DetectorSmoke and Carbon Monoxide AlarmCarbon and Smoke DetectorCombined Smoke and Carbon Monoxide AlarmCO Smoke Detector ComboSmoke Detector & Carbon Monoxide Detector Combo
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Related Categories
Smoke Alarm and Carbon Monoxide DetectorSmoke and Carbon Monoxide AlarmCarbon and Smoke DetectorCombined Smoke and Carbon Monoxide AlarmCO Smoke Detector ComboSmoke Detector & Carbon Monoxide Detector Combo
Related Categories
Smoke Alarm and Carbon Monoxide DetectorSmoke and Carbon Monoxide AlarmCarbon and Smoke DetectorCombined Smoke and Carbon Monoxide AlarmCO Smoke Detector ComboSmoke Detector & Carbon Monoxide Detector Combo