Every home should have at least one working smoke alarm. The most effective way to protect yourself and your home from fire is to identify and remove fire hazards. 65 percent of house fire deaths occur in homes with no working smoke alarms. During a home fire, working smoke alarms and a fire escape plan that has been practiced regularly can save lives. Buy a smoke alarm at any hardware or discount store. It's inexpensive protection for you and your family. Install a smoke alarm on every level of your home. A working smoke alarm can double your chances of survival. Test it monthly, keep it free of dust and replace the battery at least once a year. Smoke alarms themselves should be replaced after ten years of service, or as recommended by the manufacturer.