How often do smoke alarms need to be replaced? A national survey shows most Americans don’t know

How often should the smoke alarms in your home be replaced? If you don’t know, you’re not alone. A national survey conducted by the National Fire Protection Association (NFPA) shows that nine out of 10 Americans don’t know how often smoke alarms need to be replaced. The correct answer: every 10 years.
“While the public generally knows that smoke alarms play an important role in home fire safety, some smoke alarm messages are not as well understood,” says Lorraine Carli, vice president of Outreach and Advocacy for NFPA. “Not knowing how often smoke alarms need to be replaced—or that they even have an expiration date—are among them.”
According to Carli, that lack of awareness means some U.S. homes may have smoke alarms that have outlasted their full functionality, putting people at increased risk in the event of a home fire. NFPA statistics show that three out of five U.S. home fire deaths occur in homes with no smoke alarms or no working alarms.
Key survey findings
Half of Americans (50 percent) have three or more smoke alarms in their current home.
Almost one in five Americans who have smoke alarms (19 percent) say the oldest smoke alarm they currently have in their home is 10+ years old.
Nearly one in five Americans who have smoke alarms (18 percent) are not at all sure how old the oldest smoke alarm they currently have in their home is.
When asked how often they should replace smoke alarms, nine in 10 Americans (90 percent) did not select the correct answer, which is once every 10 years.
“Working smoke alarms reduce the risk of dying in a home fire in half,” said Carli. “That’s why it’s so important to make sure they’re working properly.”
A smoke alarm’s age can be determined by looking on the back or side of the smoke alarm, where the date of manufacture can be found. Smoke alarms should be replaced 10 years from that date (not the date of purchase or installation). In addition, smoke alarms should be tested monthly, and batteries should be replaced when they begin to chirp, signaling that they’re running low.
Fire departments throughout the U.S. and Canada play a key role in making Fire Prevention Week an annual success by implementing the campaign in their communities; departments throughout North America will be hosting open houses and other local events throughout the week of Oct 7-13.