Where should I install carbon monoxide alarms and in particular, how high off the floor?

Carbon monoxide weighs about the same as air and distributes evenly throughout the room/house. When you decide where to install a carbon monoxide alarm, choose a location where the carbon monoxide alarm will stay clean and out of the way of children or pets. It is important to refer to your user’s manual for specific installation requirements as to where to install your carbon monoxide alarm.