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Unbranded Carbon monoxide alarm 4 review

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Don't Buy this carbon monoxide (CO) alarm – it failed to sound in seven of our carbon monoxide detection tests

We’re half-way through our tests of this unbranded carbon monoxide alarm and it has already failed to sound in seven of our testsp>

Because of these failures to detect CO we have made this alarm a Don’t Buy.

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Reviewed

This dangerous carbon monoxide (CO) alarm has made such a poor start in our tests that we’re making it a Don’t Buy. It failed to detect CO in seven of our tests so far, so you can’t trust it to alert you if there’s a build-up of the deadly gas in your home. If you have this alarm, you should replace it as soon as possible with one of our Best Buys, or a model from a well-known brand.

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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.

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We have tested 28 carbon monoxide detectors and found that there are 11 Don't Buys and 17 Best Buys.
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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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