HearthCircuit

Smart Smoke Detector

Google Nest Protect

by Google

Google Nest Protect elevates a basic safety requirement into a genuinely smart, reassuring home system.

Benchmarked alongside 55 other smart home products in our lab, averaging 4.5/5 across the catalog.

Overall score4.6/5.0
Verdict
Google Nest Protect elevates a basic safety requirement into a genuinely smart, reassuring home system. It is pricier than a standard detector, but the voice alerts, interconnectivity, and self-testing make it a worthwhile investment for anyone building a connected, safer home.

Technical Specifications

Power SourceBattery or wired 120V
ConnectivityWi-Fi and Bluetooth
Sensor TypeSplit-spectrum smoke sensor
DetectionSmoke and carbon monoxide
App CompatibilityiOS and Android
  • Split-spectrum sensor for smoke and CO detection
  • Human voice alerts with hazard type and location
  • Interconnected alarms across multiple units
  • Smartphone app notifications and remote monitoring
  • Automatic monthly self-test of battery and sensors
  • Nightly Promise pathlight for nighttime reassurance
  • Compatible with Google Home and other Nest devices
  • Battery and wired power model options

Pros

  • ✓ Clear spoken alerts instead of generic beeping
  • ✓ Reduces false alarms from cooking smoke or steam
  • ✓ Easy self-testing without manual button pressing
  • ✓ Seamless integration with existing Nest ecosystem
  • ✓ Attractive, unobtrusive design fits most decor
  • ✓ Sends alerts to your phone when away from home

Cons

  • ✕ Premium price compared to standard smoke detectors
  • ✕ Requires Wi-Fi for full smart functionality
  • ✕ Battery model needs periodic battery replacement
  • ✕ Some features locked behind Nest Aware subscription
92%

Google Nest Protect

by Google

  • Speaks instead of beeps
  • Detects smoke and CO
  • Auto self-testing monthly
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Trusted by readers of HearthCircuit56 products reviewedSite average 4.5/5

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Google Nest Protect is a smart smoke and carbon monoxide alarm that rethinks what a home safety device can do. Instead of an ear-piercing shriek with no context, it speaks in a calm human voice, telling you exactly what kind of danger it has detected and where in the house it originated. It uses a split-spectrum sensor that can distinguish between fast-flaming fires and slow, smoldering ones, reducing the chance of false alarms triggered by steam or cooking smoke. Beyond detection, Nest Protect is deeply integrated into the connected home. Every unit talks to every other Nest Protect in the house, so if smoke is detected in the basement, the alarm in the bedroom upstairs will announce the exact location. The companion app sends push notifications to your phone even when you are away, and a monthly self-check silently tests the batteries, sensors, and horn so you are never caught off guard by a dead unit. Designed to blend into modern interiors, Nest Protect features a subtle Nightly Promise light that glows green when you walk by in the dark, confirming everything is working, and can be paired with other Nest devices to shut off HVAC systems automatically during a fire to stop smoke from spreading through the ductwork.

Customer reviews

Finally, an alarm that makes sense — Marcus Reed (2024-02-14)
When it went off, it actually told me there was smoke in the kitchen instead of just screaming. My whole family knew exactly what to do without panicking.
Great tech, wish it were cheaper — Priya Nair (2023-11-02)
The integration with my other Nest devices is fantastic and the self-check feature gives real peace of mind. My only complaint is the price for a multi-room setup.
No more false alarms from cooking — Diego Alvarez (2024-01-19)
My old detector went off every time I made toast. This one has never falsely triggered once, even with heavy stovetop cooking.
Solid upgrade for a smart home — Emily Foster (2023-09-27)
Setup was simple and the app notifications are reassuring when I travel. Wish the battery version lasted a bit longer between replacements.