Early detection of smoke, carbon monoxide, and natural gas is key to saving lives. The National Fire Protection Association (NFPA) recommends installing a smoke alarm on every level of your home, including in finished attics and basements. Safety organizations and local building codes recommend installing a smoke detector inside every bedroom and at the top of certain stairways.
Existing homes: The NFPA requires smoke alarms or combination alarms on every level and outside each sleeping area in existing construction. An existing household with one level and one sleeping area is required to have one smoke alarm.
New Construction Homes and Manufactured Homes: The NFPA requires AC-powered, interconnected smoke alarms to be installed inside each bedroom, outside each bedroom ares, and on every level of the home. They also require a minimum of two AC-powered, interconnected smoke alarms or combination alarms in any new construction home.
Here are some more guidelines:
Locate the first smoke alarm in the immediate area of the bedrooms. Try to protect the escape route as the bedrooms are usually farthest from an exit. If more than one sleeping area exists, locate additional smoke alarms in each sleeping area. If a hall is more than 40 feet (12 meters) long, install a smoke alarm at each end.