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Kidde Carbon Monoxide Alarm 7CO review

£19.99 Typical price

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Expert review

You’ll need to replace the batteries in the Kidde Carbon Monoxide Alarm 7CO every two to three years, but in return it promises a decade of faithful service. So, is this 2016 carbon monoxide detector a worthwhile investment? We tested its ability to alert you to the presence of carbon monoxide in a series of exacting tests, and assessed the clarity of its alarm and installation instructions. Check our results to discover if this carbon monoxide detector has what it takes to be a Best Buy alarm.

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  • Pros and cons
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Last checked by Which?

January 2022

First reviewed by Which?

August 2016

Released

January 2016

Test results

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

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Best Buys and Don't Buys
We have tested 24 carbon monoxide detectors and found that there are 10 Don't Buys and 14 Best Buys.
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Full Access first month £2.99, then £9.99 per month, cancel at 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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