Nest Protect, smoke and CO2 alarm

Nest Protect

Thinks, speaks and alerts your phone.

There’s never been a smoke and CO alarm quite like this. Nest Protect looks for fast-burning fires, smouldering fires and carbon monoxide. It also speaks up when there’s a problem, can be silenced from your mobile and will even send a message to your mobile in case you’re not home.

How does it work?

Get alerts on your mobile.

Nest Protect sends you a message when there’s a problem or the batteries are running low.

Tells you what, and where.

Nest Protect speaks up if there’s smoke or CO and tells you where it is so that you know what to do.

Sees the CO that you can’t.

Carbon monoxide is an invisible, poisonous gas. Nest Protect tells you where it’s hiding.

A light in the dark.

Nest Protect usually has its light turned off, but when you walk underneath it, Pathlight can light your way.

Every second counts..

The Split-Spectrum Sensor looks for both fast- and slow-burning fires.

Silence from the Nest app.

Just burned the toast? Silence the false alarm with your mobile, not your tea towel.

Up to 10 years life span.

Nest Protect’s long-lasting sensors keep you safe and sound for up to a decade.

Sleep safely and soundly.

Nightly Promise is a quick green glow that can be seen when you turn off the lights, letting you know everything’s working as it should.

What's in the box?

  • • Nest Protect
  • • Batteries
  • • Back plate
  • • Four screws
  • • User guide
  • • Welcome guide

  • Nest Protect Wired also includes an AC 230 V connector and three terminal blocks.

More Information on Nest Protect

  • • Nest app for Mobile alerts
  • • Split-Spectrum Sensor
  • • Voice alarms with custom location
  • • App Silence
  • • Detects carbon monoxide
  • • Up to 10 years product lifetime
  • • Heads-Up alerts
  • • Sound Check
  • • Self-Test
  • • Nightly Promise
  • • Pathlight
  • • Steam Check
  • • Wireless Interconnect
  • • Safety History
  • • What to do
  • • Home Report
  • • Emergency clip record with Nest Cam
  • Speaker loudness
    • 80 dB at 1 metre
  • Siren
    • 85 dB at 3 metres
  • Light ring
    • RGB colour ring with 6 LEDs
  • Batteries
    • Nest Protect Battery
    - Six long-life AA Energizer® Ultimate Lithium batteries
    • Nest Protect Wired
    - Three long-life AA Energizer® Ultimate Lithium backup batteries
  • Sensors
    • Split-Spectrum Sensor
    • 10-year electrochemical carbon monoxide sensor
    • Heat sensor, ± 1 oC (± 1.8 oF)
    • Humidity sensor, ± 3% RH
    • Occupancy sensor, 120-degree field of view to 20 feet (6 m)
    • Ambient light sensor
    • Omni-directional microphone, 70 dBA SNR
  • Size and weight
    • Height: 13.5 cm
    • Width: 13.5 cm
    • Nest Protect Battery weight: 379 g
    • Nest Protect Wired weight: 374 g
  • Languages • Out of the box
    - - UK: English (British) • Downloadable
    - - French (FR) and (CA), Dutch, Spanish, English (America)
  • Wireless
    • Working Wi-Fi connection: 802.11b/g/n at 2,4Ghz
    • Wireless Interconnect: 802.15.4 at 2,4 GHz
    • Bluetooth Low Energy (BLE)
  • Connectivity requirements
    • Wi-Fi connection
    • Nest app on mobile or tablet with iOS or Android
    • Free Nest account
  • Operating temperature and humidity
    • The alarm should not be installed in locations where the normal ambient temperature is below 4 °C or exceeds 38 °C.
    • Humidity range: 20% RH to 80% RH (non-condensing).
  • Warranty
    • 2-year limited warranty. For support, visit
  • Certification
    • Nest Protect complies with the following smoke and carbon monoxide alarm standards in Europe: EN-14604, EN-50291, EN-50271:2010, EN-50292.
  • • Industrial grade smoke sensor with a 10yr life span
  • • Available in wired and battery models for increased installation flexibility and to conform to building control specifications.
  • • Monitoring and activation alerts to a phone or any user with an application installed and trusted
  • • Voice alerts that notify of issues and upcoming alarms
  • • Unnecessary false alarms easily solved with pre-warnings of activations
  • • Monitors carbon monoxide, heat, humidity and occupancy
  • • Informs the homeowner of where the activation is according to named areas protected and makes sure that people do not travel to that zone
  • • Traffic light indicating system allows for a visual assessment and alerting of issues and signals when the Protect unit is all ok.
  • • Innovative Pathlight mode lights the way at night
  • • Fit with a Nest Learning Thermostat 3rd Generation and operate the potential source of the fire or carbon monoxide
  • • Fit with a Nest Cam and get immediate pictures of the incident
  • • Easy to use Nest application that allows total control of the unit.

How APP rates its Certified Stores

Nest Platinum Medal


A top rated Certified Stores that offers the whole range of Nest and has access to a host of resources. These stockists are more likely to have stock and offer the best service and knowledge.

Nest Gold Medal


A great store that will hold a limited range of Nest and may require a lead-time for the un-stocked items.

Nest Silver Medal


May only stock one or two models of Nest and will require a lead-time for other Nest items. These can also be trade specific stockists and feature Nest items accordingly.