A properly installed and maintained smoke alarm is the only thing in your home that can alert you and your family to a fire 24 hours a day, seven days a week. Whether you're awake or asleep, a working smoke alarm is constantly on alert, scanning the air for fire and smoke.
According to the National Fire Protection Association more than 66 percent of home fire deaths occurred in homes without a working smoke alarm. A working smoke alarm significantly increases your chances of surviving a deadly home fire.
What powers a smoke alarm?
Smoke alarms are powered by battery or they are hardwired into the home's electrical system. If the smoke alarm is powered by battery, it runs on either a disposable 9-volt battery or a non-replaceable 10-year lithium ("long-life") battery. A backup battery is usually present on hardwired alarms and may need to be replaced.
These batteries must be tested on a regular basis and, in most cases, should be replaced at least once each year (except for lithium batteries).
Install smoke alarms in key areas of your home
Install smoke alarms on every level of your home, including the basement. Many fatal fires begin late at night or early in the morning, so the U.S. Fire Administration recommends installing smoke alarms both inside and outside of sleeping areas.
Since smoke and many deadly gases rise, installing your smoke alarms at the proper level will provide you with the earliest warning possible. Always follow the manufacturer's installation instructions.
To learn more about smoke detectors and fire safety visit the U.S. Fire Administration website at http://www.usfa.dhs.gov/.