A CO alarm is designed to detect harmful amounts of carbon monoxide in the air, which is created when fuels, such as gasoline, wood, charcoal, coal, natural gas, propane, oil, kerosene and methane burn incompletely. Carbon monoxide is deadly, and since it is odorless, it often isn't noticed without a detector.
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Where to place your CO Alarms
Carbon monoxide, unlike smoke from a fire, will mix evenly with the air in your home. For this reason alarms can be placed at the ceiling level or low on a wall.
For best protection, placement should be:
On each level of the home that contain sleeping areas.
In each bedroom or within 15 feet of each sleeping area.
In every room that contains a fuel-burning appliance. (Make sure to place at least 5 feet from appliance.)