Best Smoke Detector & Carbon Monoxide Detector Combos Updated February 2026
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Best Smoke Detector & Carbon Monoxide Detector Combos
2026 Buyer's GuideUpdated February 2026
Advertiser disclosure About our rankings
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Best Overall
1

10.0

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 Overall

10.0

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 Overall

10.0

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

9.9

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

9.9

2
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

9.9

2
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
3

9.7

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

9.7

3
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

9.7

3
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
4

9.6

Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack
Ease of installation
Quality
Value for money
Battery life
Safety
Lifespan
Read Full Review

9.6

4
Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack
Ease of installation
Quality
Value for money
Battery life
Safety
Lifespan
Read Full Review

9.6

4
Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack
Available in:  2 sizes
Read Full Review
Ease of installation
Quality
Value for money
Battery life
Safety
Lifespan
Popular
5

9.5

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

9.5

5
Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators...
Ease of installation
Smoke detector quality
Quality
Popular

9.5

5
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
Best Value
6

9.4

10-Year Battery Smoke and Carbon Monoxide Detector 2-in-1 with Digital Display, 85dB Visual & Audible Alarm, Easy Setup for Liv...
Ease of installation
Safety
Smoke detection
Noise level
Functionality
Value for money
Save 5%
Best Value

9.4

6
10-Year Battery Smoke and Carbon Monoxide Detector 2-in-1 with Digital Display, 85dB Visual & Audible Alarm, Easy Setup for Liv...
Ease of installation
Safety
Smoke detection
Noise level
Functionality
Value for money
Save 5%
Best Value

9.4

6
10-Year Battery Smoke and Carbon Monoxide Detector 2-in-1 with Digital Display, 85dB Visual & Audible Alarm, Easy Setup for Liv...
Available in:  2 styles
Ease of installation
Safety
Smoke detection
Noise level
Functionality
Value for money
Save 5%
7

9.2

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%

9.2

7
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%

9.2

7
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%
8

9.1

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

9.1

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

9.1

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
Premium Pick
9

8.9

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

8.9

9
First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack
Ease of installation
Quality
Value for money
Premium Pick

8.9

9
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
10

8.8

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

8.8

10
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

8.8

10
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

Our Top Choice

Best Overall
1

10.0

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 Overall

10.0

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 Overall

10.0

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
CO Smoke Detector ComboCarbon and Smoke DetectorSmoke and Carbon Monoxide AlarmSmoke Alarm and Carbon Monoxide DetectorCombo Smoke DetectorSmoke Alarm
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Related Categories
CO Smoke Detector ComboCarbon and Smoke DetectorSmoke and Carbon Monoxide AlarmSmoke Alarm and Carbon Monoxide DetectorCombo Smoke DetectorSmoke Alarm
Related Categories
CO Smoke Detector ComboCarbon and Smoke DetectorSmoke and Carbon Monoxide AlarmSmoke Alarm and Carbon Monoxide DetectorCombo Smoke DetectorSmoke Alarm