10 Best hardwired smoke and co detectors of 2026

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First Alert
FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3

25% Off
Main highlights

Key Features
Features electrochemical CO sensing, ionization sensor for fast-burning fires, 85-decibel alarm, connects with other alarms, easy installation with tamper-resistant brackets.

Ideal Use Cases
Perfect for family homes, ensuring round-the-clock safety from smoke and carbon monoxide, especially in multi-level houses or buildings with multiple rooms.

Customer Reviews Highlight
Most praised for its easy installation process and the peace of mind provided by the interconnected alarm system`s reliability and loud alert system.
9.9

Exceptional

Our Rating

9.9
safety

9.5
Easy installation

9.3
Detecting movement
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Value for Money

2

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

11% Off
Main highlights

Early Warning Interconnect
All alarms sound simultaneously for comprehensive home safety.

Ideal for Homes with Cooking
Advanced sensing technology minimizes nuisance alarms from cooking.

Praised Feature: Easy Installation
Quick Connect Plug simplifies setup without rewiring needed.
Key specs
- batteries:1 9V included
- power source:Corded Electric
- alarm:Smoke, CO
- sensor:Ionization
- style:Precision Detection
9.8

Exceptional

Our Rating
3

First Alert

First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack

16% Off
9.5

Excellent

Our Rating
4

Kidde

Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators, 2 Pack
9.2

Excellent

Our Rating
5

First Alert

First Alert BRK 9120Bff-6 Hardwired Smoke Detector with Battery Backup, 6-Pack

18% Off
9.1

Excellent

Our Rating
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6

Kidde
Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Voice Alerts, Interconnectable LED Warning Light Indicators

18% Off
Main highlights

Dual Detection & Long Battery
2-in-1 smoke and CO detection with 10-year battery backup.

Ideal for Comprehensive Home Safety
Perfect for homes needing reliable smoke and CO monitoring.

Voice Alerts Enhance Safety
Customers praise clear voice alerts for timely warnings.
Key specs
- batteries:10-year battery backup
- power source:Hardwired
- alarm:Smoke and Carbon Monoxide Detector
- sensor:Photoelectric, Electrochemical
- style:Modern
9.0

Excellent

Our Rating
7

BRK
BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack
Main highlights

Reliable Detection and Alert
Equipped with an ionization sensor, detects smoke from fast flaming fires with an 85 decibel alarm.

Ideal for Comprehensive Home Safety
Perfect for placing on each home level and bedroom for complete protection.

Praised Easy Installation
Simple installation with test/silence button and side load battery compartment.
8.7

Very Good

Our Rating

9.9
Tech Support

9.5
Easy installation

9.5
Noise level
8

First Alert
First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack

34% Off
Main highlights

Advanced Sensing Technology
First Alert's Precision Detection reduces nuisance alarms and offers early fire warnings.

Ideal for Home Safety
Perfect for homes needing interconnected alarms for comprehensive fire safety.

Easy Installation Praised
Customers love the simple installation and compatibility with existing wiring.
8.4

Good

Our Rating

9.5
Easy installation

9.3
Instruction

9.3
worth the money
9

Kidde
Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Interconnectable LED Warning Light Indicators, 30CUA10
Main highlights

2-IN-1 Detection and 10-Year Battery
Alerts for smoke and CO with no battery changes for 10 years.

Ideal for Home Safety Systems
Perfect for replacing outdated detectors in interconnected home systems.

Ease of Installation Highlighted
Customers praise simple installation and reliable, loud alarm performance.
Key specs
- batteries:Yes
- power source:Hardwired
- alarm:Smoke and Carbon Monoxide Detector
- sensor:Photoelectric, Electrochemical
- style:Detector
8.2

Good

Our Rating
10

Kidde
Kidde Hardwired Smoke Detector, 10-Year Battery Backup, Interconnectable, LED Warning Light Indicators, 20SA10

10% Off
Main highlights

Reliable Smoke Detection
Features a loud 85-decibel alarm with LED indicators for smoke detection and reduced false alarms.

Ideal for Whole-Home Safety
Interconnect capability ensures all alarms sound together, enhancing home safety.

Highly Rated by Customers
Praised for its 10-year battery backup and easy installation.
Key specs
- color:White
- power source:Hardwired
- alarm:Smoke Detector
- sensor:Photoelectric
- dimensions:1.88D x 5W x 5H
7.9

Good

Our Rating

10 Best hardwired smoke and co detectors of 2026

1

FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3

9.9

9.5

9.3

How do we rank?

How do we rank?

Analyzing top stores

2

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

3

First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack

4

Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators, 2 Pack

5

First Alert BRK 9120Bff-6 Hardwired Smoke Detector with Battery Backup, 6-Pack

6

Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Voice Alerts, Interconnectable LED Warning Light Indicators

7

BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack

9.9

9.5

9.5

8

First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack

9.5

9.3

9.3

9

Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Interconnectable LED Warning Light Indicators, 30CUA10

10

Kidde Hardwired Smoke Detector, 10-Year Battery Backup, Interconnectable, LED Warning Light Indicators, 20SA10

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