Carbon monoxide detectors advice guidesFind out how to choose, install and maintain carbon monoxide detectors to keep you and your family safe.FeaturedHow to choose a carbon monoxide detectorby Matt StevensHow to choose an effective carbon monoxide detector that you can trust - find out about the different types and how to choose a safe, user-friendly model.FeaturedHow to install and test carbon monoxide detectorsby Matt StevensEnsure your own and your family's safety by installing carbon monoxide alarms correctly. Our Which? experts reveal the right place to fit carbon monoxide alarms to ensure they stand the best chance of detecting killer CO gas.FeaturedCarbon monoxide symptomsby Matt StevensThe key carbon monoxide symptoms explained. Find out the tell-tale carbon monoxide symptoms and what to do if you think there's a carbon monoxide leak.Put us to the testOur 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.Sign up nowor loginHow we test carbon monoxide detectorsOur carbon monoxide detector reviews are based on our independent safety tests. Find out more about how we test carbon monoxide detectors to find the best.Five ways to avoid a carbon monoxide build-upRead our guide to avoid a carbon monoxide build-up in your home. Our five-point plan will help to keep you and your family safe from a carbon monoxide leak.What to do when a carbon monoxide detector goes offFollow these six steps to keep you and your family safe when your carbon monoxide alarm goes off. We also reveal the best carbon monoxide detectors so you can avoid the worst, and tell you about carbon monoxide poisoning symptoms.