VaultSTROur pick
Our pick for the best smoke and CO alarm for Airbnb is the Google Nest Protect Smoke + CO Alarm ($150). Every setting a guest can change, a guest will change.
See the Google Nest Protect Smoke + CO Alarm on Amazon If you only need code-compliance coverage at the lowest cost, the First Alert Battery Smoke and CO Alarm ($37) is the budget alternative — but the Nest's phone alerts and self-testing are exactly what a remote host is paying for.
Quick comparison
| Pick | Product | Approx. price | Best for |
|---|---|---|---|
| Our pick | Google Nest Protect Smoke + CO Alarm | $150 | The best balance of durability, guest experience, and price for most listings |
Prices are approximate — confirm on the product page. VaultSTR may earn a commission on purchases made through links on this page, at no cost to you. Retailers never influence our picks.
What to look for in an Airbnb smoke and CO alarm
Guest-proof over feature-rich. Every setting a guest can change, a guest will change. Lock what can be locked, default what can be defaulted, and laminate the rest.
Self-recovering by design. Smart plugs that reboot the router, devices that reconnect after power loss, spare remotes in a drawer. Electronics fail on Friday nights; design for recovery without you.
Privacy is policy. Cameras outside only and disclosed, guest network isolation, profile sign-out at turnover. Electronics are where hosts accidentally create review disasters and platform violations.
How many do you need?
Wi-Fi that covers every room, one living-room TV minimum, bedside charging per sleeper, and the entry/safety stack. Wire it once, label it all.
Care and replacement
Monthly reboot schedule, turnover profile sign-outs, quarterly battery sweep, and firmware updates when the platform nags.