Not all fire detectors are created equal. Three (3) different types were installed in your house.
Here is a PHOTO of the two categories of fire detectors described below.
Smoke Detectors
Most of the fire detectors in your house are smoke detectors (with or without built-in a carbon monoxide (CO) detector). These use 9V batteries.
To access the battery compartment in a smoke detector, you can leave the unit attached to the ceiling. Use the small lever on the side of the smoke detector to open the door.
Heat Detectors
Your house may also have a heat detector. This uses 3 AAA batteries.
To access the battery compartment in a heat detector, unscrew the unit and remove it from the ceiling.
Life Expectancy of Fire Detectors
Fire detectors have a lifespan. If changing the battery doesn't stop the beeping, you might need to replace it because your fire detector may be dying. Life expectancy varies based on the type of detector:
- Smoke detectors: 7 to 10 years
- Smoke detectors with a built-in CO detector: 5 to 7 years
- Heat detectors: 10 to 15 years