A look at the best carbon monoxide detectors to help keep you and your family safe.
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4 Best Carbon Monoxide Detectors of 2024
Updated on Dec. 09, 2024
Carbon monoxide (CO) is an odorless, colorless gas that can leak from improperly ventilated engines and appliances in your home. In large amounts, it can be deadly to you and your family. Having a CO detector in your house can help you and your family avoid carbon monoxide poisoning.
There are multiple types out there, from battery-operated to full-on smart detectors. But not all are created equal. As such, finding the best carbon monoxide detector for your home should be a top priority. We’ve rounded out some of the best options here.
Via Merchant
Best Overall
First Alert Hardwired CO Detector
Experts recommend placing multiple detectors throughout your home. The First Alert Hardwired CO detector easily connects with other devices, ensuring the proper protection of you and your family.
This model comes with a microprocessor, which should alleviate any possible false alarms. Because it’s hardwired, you’ll need a dedicated electrician to install it. It also features a battery backup system to help your home stay safe even when the power goes out.
Pros
- Can connect multiple devices
- Microprocessor helps cut down on false alarms
- Battery backup system for added security
Cons
- No LED warning light
- No voice alarm
On Sale
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Best with Smoke Detection
USI Three-in-One Smart Alarm
For a carbon monoxide alarm that doubles as a smoke detector, the USI Three-in-One smart alarm is a surefire win. The dual-sensor design pick ups on fast-burning or smoky, smoldering fires.
The 10-year sealed battery should last the device’s entire life span. The downsides? No LED light or digital display.
Pros
- Fire, smoke and carbon monoxide detection in one device
- Dual-sensor design detect multiple types of fires
- Ten-year battery life
Cons
- No digital display or smart features
- No voice alarm
On Sale
Via Merchant
Best Plug-In
First Alert Carbon Monoxide Plug-In Alarm
Dawson doesn’t recommend plug-in CO detectors because outlets tend to be too low to the floor for effective carbon monoxide monitoring. But plug-in alarms can be useful for taller outlets or as a backup detection method.
If you prefer a plug-in detector, this First Alert carbon monoxide plug-in alarm is one of the best options you’ll find. Its digital display keeps you up-to-date on your latest CO readings. It also features a peak memory option, which Dawson recommends to keep track of your highest past CO levels.
The battery backup system means it will still function during power outages. The 85-decibel alarm is loud enough to send alerts throughout the house. It coms with a seven-year warranty.
Pros
- Digital display
- Battery backup
- Peak memory feature
- Loud alarm
- Seven-year warranty
Cons
- No voice alarm
- No LED warning light
Via Merchant
Best for Smart Homes
Google Nest Protect
Google Nest Protect is ideal for those who want a smart carbon monoxide detector that can also make use of other features in the Google Home ecosystem.
It easily connects with other Google devices to keep your home running smoothly. It offers smart features like instantly telling you which room the alarm originates from.
It comes with a built-in smoke detector, and can be purchased in hardwired and battery-powered options. It’s more expensive than the other options on our list, but it’s well worth the price for those who want the extra features.
Pros
- Built-in smoke detector
- Connects to the Google Home ecosystem
- Can tell you which room the alarm is coming from
- Available in hardwired and battery-powered models
- Stylish design
Cons
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Expensive ($130)
Place CO detectors outside rooms with appliances that can leak carbon monoxide, such as the laundry room, kitchen and bedrooms. Keep them close enough so they’ll wake you in the middle of the night.
How many carbon monoxide detectors do I need?
For a multi-story home, experts recommend placing one on every floor, and near every room that may produce a buildup of the deadly gas.
