Trusted Fire Safety, Now Connected and Compatible.
Elevate your home’s fire and CO safety whether home or away. Get smart alerts with the First Alert SC5 Smart Smoke & Carbon Monoxide Alarm.
Get Smart Smoke & CO Alerts
Connect with the First Alert app to check the alarm's status, test alarm's function and receive mobile alerts if smoke and CO are detected.

Works With & Replaces Nest Protect
Seamlessly integrate with existing Google Nest Protect Alarms* in your home to expand your safety ecosystem or if it’s time to replace.

Interconnect With Compatible Alarms
Create a smart and connected fire and CO safety system in your home. When one sounds, they all sound.
Works with select First Alert and BRK alarm models, and Google Nest Protect*.

Install the Latest Smoke Alarm Technology
Equipped with Precision Detection advanced sensing technology that meets updated industry standards to provide an early warning and reduce cooking nuisance alarms.
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Install Smart Smoke & CO Detection
FAQs
Where can I purchase a First Alert SC5 Smart Smoke & CO Alarm?
Where can I purchase a First Alert SC5 Smart Smoke & CO Alarm?
The First Alert Smart Smoke & CO Alarm is available in hardwire or battery powered options on FirstAlert.com, and coming soon to the Google Store and select U.S. and Canadian retailers.
How will my Nest Protect work with the First Alert SC5 Smart Smoke & CO Alarm?
How will my Nest Protect work with the First Alert SC5 Smart Smoke & CO Alarm?
Your new First Alert SC5 Smart Smoke & CO Alarm will work seamlessly alongside your other Nest Protect devices and will work with the Google Home app.
Will First Alert's SC5 Smart Smoke & CO Alarm work with the Google Home app?
Will First Alert's SC5 Smart Smoke & CO Alarm work with the Google Home app?
Yes, your First Alert SC5 Smart Smoke & CO Alarm will work with your Google Home app.
My Nest Protect is expiring. How can I replace my device?
My Nest Protect is expiring. How can I replace my device?
To meet certification standards, 2nd gen Nest Protect must be replaced after 10 years from the date of manufacture. When you’ve determined that your device needs to be replaced, you’ll need to select a replacement device, uninstall your Nest Protect, and set up your replacement device.
The First Alert Smart Smoke & Carbon Monoxide Alarm is a compatible replacement for your 2nd gen Nest Protect. Note: First Alert Smart Smoke and Carbon Monoxide Alarm will work with your other Nest Protect devices only in the Google Home app.
*Compatibility with Google Nest Protect requires the Google Home app and a Google Account.