We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies as per our policy which also explains how to change your preferences.

Kidde Carbon Monoxide Alarm 7CO review

Launched Reviewed

Try Which? for £1 to reveal the products that perform

Typical price


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. Is this 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 and expert verdict to discover if this carbon monoxide detector has what it takes to join the ranks of the Best Buy alarms that we recommend.
Is it worth your money?
Or is it a waste of cash?

The Which? difference

As well as thousands of impartial product reviews from our Test Labs, a Which? membership also gets you:

  • Unlimited access across which.co.uk
  • Advice on the move with our apps
  • Which? magazine delivered to your door
  • The inside scoop on important issues, from scams to savings accounts

Which? can help you make good decisions