To get the most out of your carbon monoxide detector, make sure it’s installed either on the ceiling or very high up on the wall. This is because CO is just barely lighter than air; while CO itself does not rise, it’s often found in rising air (such as that from a stovetop or oven, for example). This makes a carbon monoxide detector located high up much more effective than one at ground level.
Also make sure to place your carbon monoxide detectors near sleeping areas and near areas where CO is most likely to build. That said, keep it far away from the actual CO-producing unit (stoves, ovens, driers, washers, etc.). If your home has multiple floors, make sure that each floor has at least one alarm.
Following these tips will ensure your CO detectors function optimally when you need them most.