Interconnected smoke alarms sound together when one detects a fire, helping alert people in other parts of the home.
Hardwired smoke alarms usually have backup batteries. Connection to household power does not eliminate battery maintenance.
Smoke alarms have a limited service life. The U.S. Fire Administration recommends replacement 10 years after manufacture.
Test smoke alarms every month using the test button and follow the manufacturer’s maintenance instructions.
Check each alarm’s manufacture date and replace units at 10 years, or sooner if the manufacturer directs. Have a qualified electrician handle hardwired installation.
Check for smoke alarms in every bedroom, outside each sleeping area, and on every level, including the basement. Ask about interconnected alarms if yours do not sound together.