Where Should Smoke Detectors Be Installed?

Cover bedrooms and sleeping areas

NFPA and CPSC guidance calls for smoke alarms inside every bedroom and outside each separate sleeping area. Closed doors and distance make the alarm near the person sleeping especially important.

Cover every level

Install alarms on every level, including the basement. Large homes, separated wings and unusual layouts may need additional alarms.

Choose exact locations carefully

Smoke alarms generally belong on the ceiling or high on a wall and should be kept away from cooking appliances to reduce nuisance alarms. Follow the manufacturer’s distance and mounting instructions for the exact model.

Interconnect when possible

NFPA recommends interconnected alarms so a unit that detects smoke can sound the rest of the household system. Compatibility and wiring must be considered when replacing units.

Safety references

Primary sources used for this page:

• NFPA smoke-alarm safety guidance
• U.S. CPSC fire-safety guidance

Manufacturer instructions and current local requirements control. For an emergency, call 911.