Daylight savings an opportunity to test smoke detectors | Mountain View Fire and Rescue - Black Diamond Fire

Daylight Savings time is Sunday, Nov 3 and is also an opportunity to change your batteries in your smoke alarms.

Below are some recommendations on smoke alarms from Tim Perciful, spokesperson for Mountain View Fire and Rescue.

Roughly two thirds of home fire deaths happen in homes with no smoke alarms or no working smoke alarms, according to the National Fire Protection Association

Why smoke Alarms Need To Be Replaced:

  • Most smoke alarms should be replaced after ten years from their manufacturer date. This is 87,658 hours of service
  • Some smoke alarms have a ten year battery so you can discard them together.

Smoke Alarm Maintenance

  • Don’t decorate, paint, or put stickers on smoke alarms.
  • It may be good to vacuum the smoke alarm in some environments.
  • Check smoke alarms once a month.
  • Change the batteries at least once a year.


  • Smoke alarms should be in every bedroom, outside each sleeping area and on every level of you home.
  • It is best to interconnect all smoke alarms throughout the home. This will notify everyone in the home of an emergency if any one detector sounds.

Types of Smoke Alarms

  • Ionization and Photoelectric smoke alarms are the two most common types. It is best to have a combination Ionization and Photoelectric smoke alarm or both types in the home.
  • Ionization – These are by far the most common. They are more responsive at fast moving flaming fires.
  • Photo Electric – These are more responsive at detecting smoldering fires.

People Who Are Deaf or Hard-Of-Hearing

Fire Escape Plans and Exit Drills

  • A smoke alarm is great at notifying people of a fire but people should have a plan and practice their plan with their families. Once a smoke alarm sounds, people should evacuate immediately and practicing their plan will help children and adults know what to do and where to go in various parts of the home.

NFPA has more information at


For more information please contact Tim Perciful at or 253-508-7273.



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