Smoke and CO alarms: safety first
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Connected alerts can be useful when you are away, but a phone notification is not the sound that wakes somebody at home. Start with the right smoke and carbon-monoxide alarms for the building and follow their installation instructions.
Products to compare
Concrete examples to help you choose a setup. Start with the fit and requirements, then check the exact model before buying.
Based on manufacturer documentation.
Good for: A hardwired smoke/CO alarm installation
First Alert SC5 hardwired smart smoke/CO alarm
A documented hardwired smoke and carbon-monoxide alarm with connected notifications.
- Before you buy
- Confirm wiring, interconnect compatibility and account/platform requirements from the exact manual. A phone notification supplements the local alarm.
Plan your setup
Cover the home correctly
The U.S. Fire Administration recommends smoke alarms in sleeping rooms, outside sleeping areas, and on every level, including the basement. It recommends interconnection so an alarm in one area can sound throughout the home. Check your local requirements and use a qualified electrician for hardwired installation.
Keep the safety function independent
Check the exact manual for sensing type, certification, backup power and compatible wired or wireless interconnection. An ordinary air-quality sensor, camera that hears alarms, or smart speaker is not a substitute for the required alarm. Do not remove a battery or disable an alarm to silence an automation.
Connected features need their own check
First Alert’s SC5 is a current manufacturer-documented smoke/CO alarm example. Verify the exact account, phone and platform requirements rather than assuming that every smart alarm supports Matter or Apple Home. Understand whether internet loss affects remote alerts, and confirm that the local alarm and interconnection still operate as specified.
Test and replace
USFA recommends monthly smoke-alarm tests. Check the manufacture date, replacement interval and backup-battery instructions; smoke alarms generally need replacement after ten years, while exact device and CO-sensor lifetimes come from the manual. Keep an escape plan that everyone in the household understands. Do not wait for a push notification before responding to an audible alarm.
Sources and scope
Reviewed against documentation on October 3, 2026. No new hands-on testing.
More manufacturer notes
These examples establish product identity and selected documented capabilities, not a hands-on ranking. Confirm the exact regional model, support period and retailer SKU before buying.
First Alert SC5 hardwired smart smoke/CO alarm
A documented hardwired smoke and carbon-monoxide alarm with connected notifications.
Check: Confirm wiring, interconnect compatibility and account/platform requirements from the exact manual. A phone notification supplements the local alarm.