By clicking a retailer link you consent to third party cookies that track your onward journey. If you make a purchase, Which? will receive an affiliate commission which supports our mission to be the UK's consumer champion.

NestProtect 2nd Generation Smoke + Carbon Monoxide Alarm

  • Smoke alarm
  • Battery/Mains
  • Smart optical smoke alarm
£94.99View retailers
Test score

By clicking a retailer link you consent to third party cookies that track your onward journey. If you make a purchase, Which? will receive an affiliate commission which supports our mission to be the UK's consumer champion.

Sign up to unlock the full expert review

The Nest Protect 2nd Generation Smoke + Carbon Monoxide Alarm is a smart smoke alarm that’s two products in one - offering protection against CO and smoke. Launched back in 2017, it sounds as a traditional smoke alarm would do, while also sounding an alarm through your smartphone. As it doesn't come with a heat detection function, it's no longer suitable for homes in Scotland unless a separate interlinked smoke and heat alarm system is also installed. But does it do a good job of detecting smoke and how quickly does it sound the alarm? We tested it to find out, so read on for our full review.

pros

Content has been blurred out, please log in to view.

cons

Content has been blurred out, please log in to view.
KEY TEST RESULTS
Wood fires
Cotton fires
Sound output
  • Nov 2023Last checked by Which?
  • Jun 2017First reviewed by Which?