How long do smoke alarms last?
Most smoke alarms last 10 years. NFPA says to replace smoke alarms when they are 10 years old.
Smoke alarms are the one appliance on this list with a hard age limit. NFPA says to replace them when they are 10 years old, and the manufacture date is printed on the back.
Typical lifespan: 10 years
NFPA says to replace smoke alarms when they are 10 years old.
Smoke alarm maintenance checklist by season
Spring
Test every alarm with the test button, which NFPA suggests doing monthly. Vacuum the vents lightly to remove dust and insects.
Summer
Check the manufacture date on the back of each alarm. Replace any alarm that is 10 years old or has no date.
Fall
Change the batteries in alarms that use standard batteries; the clock change in the fall is a handy reminder. Sealed ten-year battery alarms are replaced as a whole unit.
Winter
Check that alarms are in each bedroom, outside sleeping areas and on every level. Make sure your household knows the sound and the escape plan.
Signs your smoke alarm needs replacing
- The alarm is 10 years old, or has no readable date.
- It chirps even with a new battery.
- It fails the test button, or sounds nuisance alarms after cleaning.
- It is yellowed, painted over or damaged.
Typical smoke alarm warranty
Manufacturer warranties on smoke alarms are commonly several years, with some ten-year sealed models carrying a limited warranty for the life of the battery. Many fire departments give out alarms free; check your local fire department.
An appliance warranty tracker keeps your smoke alarm's coverage dates and receipt in one place.
What to keep for a smoke alarm
- The purchase receipt or packaging
- The manufacture date from the back of each alarm
- The model number and a list of where each alarm is
- A note of the replacement date
Common questions
How long do smoke alarms last?
Most smoke alarms last 10 years. NFPA says to replace smoke alarms when they are 10 years old.
How often should I test my smoke alarms?
NFPA suggests testing at least monthly using the test button.
Where should smoke alarms go?
Inside every bedroom, outside each sleeping area and on every level, including the basement, according to NFPA.
How do I maintain a smoke alarm?
Follow your manual first. Each season: spring, test every alarm with the test button, which NFPA suggests doing monthly. Vacuum the vents lightly to remove dust and insects. Fall, change the batteries in alarms that use standard batteries; the clock change in the fall is a handy reminder. Sealed ten-year battery alarms are replaced as a whole unit.