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Nest Protect 2nd Generation Smoke + Carbon Monoxide Alarm review

Key features
  • Smoke alarm
  • Battery/Mains
  • Smart optical smoke alarm
Reviewed

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. 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.

Included in our expert review
  • Pros and cons
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Test results

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

Find out how we test smoke alarms>
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RetailerRetailer ratingPriceIn stock
Amazon.co.uk
£89.00
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Make smarter choices

We have tested 34 smoke alarms and found that there are 9 Don't Buys and 5 Best Buys.
Range of Smoke alarm scores
  1. 0%
    Lowest score
  2. 43%
    Average score
  3. 93%
    Highest score
We'll show you where this model sits on the scale so that you can see how it compares to smoke alarms we've tested
Try Which?
First month only £5, then £9.99 per month, cancel any time

Put us to the test

Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

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