
IMPORTANT: WHAT YOUR CO ALARM CAN AND CANNOT DO If the bedroom doors are usually closed at night, alarms should be placed in each bedroom as well as in the common hallway between them. CO alarms also may not sense CO on a different level of a residence or building. For example, a second floor alarm may not sense a CO leak on the first floor or in the basement. Therefore, alarms should be placed on every level of a residence or building. If the alarm is located outside of a bedroom, it may not wa