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

10.0

Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators, 30CUD10
Ease of installation
Quality
Safety
Read Full Review
Save 15%
Picked by 220 people this week!
Best Overall

10.0

1
Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators, 30CUD10
Ease of installation
Quality
Safety
Picked by 220 people this week!
Save 15%
Read Full Review
Best Overall

10.0

1
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
Picked by 220 people this week!
Save 15%
2

9.9

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

9.9

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

9.9

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

9.7

KIMROG 10-Year Sealed Battery 2-in-1 Smoke & Carbon Monoxide Detector Alarm | Home/Garage Combo CO & Smoke Alarm Detector with ...
Ease of installation
Smoke detector quality
10% Coupon

9.7

3
KIMROG 10-Year Sealed Battery 2-in-1 Smoke & Carbon Monoxide Detector Alarm | Home/Garage Combo CO & Smoke Alarm Detector with ...
Ease of installation
Smoke detector quality
10% Coupon

9.7

3
KIMROG 10-Year Sealed Battery 2-in-1 Smoke & Carbon Monoxide Detector Alarm | Home/Garage Combo CO & Smoke Alarm Detector with ...
Available in:  2 sizes
Ease of installation
Smoke detector quality
10% Coupon
Best Value
4

9.5

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

9.5

4
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

9.5

4
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
Popular
5

9.4

Kidde Smoke Detector & Carbon Monoxide Detector Combo with 10-Year Battery,‎White
Ease of installation
Quality
Read Full Review
Save 24%
Popular

9.4

5
Kidde Smoke Detector & Carbon Monoxide Detector Combo with 10-Year Battery,‎White
Ease of installation
Quality
Save 24%
Read Full Review
Popular

9.4

5
Kidde Smoke Detector & Carbon Monoxide Detector Combo with 10-Year Battery,‎White
Available in:  4 sizes ,  2 options
Read Full Review
Ease of installation
Quality
Save 24%
6

9.3

First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pack
Ease of installation
Save 11%

9.3

6
First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pack
Ease of installation
Save 11%

9.3

6
First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pack
Available in:  4 sizes
Ease of installation
Save 11%
7

9.0

Yfwsrecinoe 2 Pack Upgraded Combination Smoke and Carbon Monoxide Alarm Detector, Dual Sensor Smoke Alarm&Carbon Monoxide Detec...
Quality
Ease of installation
Value for money
Battery life
Safety
Look

9.0

7
Yfwsrecinoe 2 Pack Upgraded Combination Smoke and Carbon Monoxide Alarm Detector, Dual Sensor Smoke Alarm&Carbon Monoxide Detec...
Quality
Ease of installation
Value for money
Battery life
Safety
Look

9.0

7
Yfwsrecinoe 2 Pack Upgraded Combination Smoke and Carbon Monoxide Alarm Detector, Dual Sensor Smoke Alarm&Carbon Monoxide Detec...
Available in:  6 colors
Quality
Ease of installation
Value for money
Battery life
Safety
Look
Premium Pick
8

8.6

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
Premium Pick

8.6

8
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
Premium Pick

8.6

8
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
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%

8.2

9
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%

8.2

9
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%
10

8.0

2-Pack, Smoke Alarm and Carbon Monoxide Detector, Carbon Monoxide and Smoke Detectors with LCD Display, Battery Powered, Easy t...
Ease of installation
Functionality
Smoke detector quality
Security
Value for money
Sound quality

8.0

10
2-Pack, Smoke Alarm and Carbon Monoxide Detector, Carbon Monoxide and Smoke Detectors with LCD Display, Battery Powered, Easy t...
Ease of installation
Functionality
Smoke detector quality
Security
Value for money
Sound quality

8.0

10
2-Pack, Smoke Alarm and Carbon Monoxide Detector, Carbon Monoxide and Smoke Detectors with LCD Display, Battery Powered, Easy t...
Available in:  4 sizes ,  3 styles
Ease of installation
Functionality
Smoke detector quality
Security
Value for money
Sound quality

Our Top Choice

Best Overall
1

10.0

Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators, 30CUD10
Ease of installation
Quality
Safety
Read Full Review
Save 15%
Picked by 220 people this week!
Best Overall

10.0

1
Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators, 30CUD10
Ease of installation
Quality
Safety
Picked by 220 people this week!
Save 15%
Read Full Review
Best Overall

10.0

1
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
Picked by 220 people this week!
Save 15%
Related Categories
Smoke and Carbon Monoxide AlarmSmoke Alarm and Carbon Monoxide DetectorSmoke Detector Co2 ComboCarbon and Smoke DetectorFire Alarm Smoke DetectorSmoke Alarm
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Smoke and Carbon Monoxide AlarmSmoke Alarm and Carbon Monoxide DetectorSmoke Detector Co2 ComboCarbon and Smoke DetectorFire Alarm Smoke DetectorSmoke Alarm