NFPA 72 Chapter 29: Home Smoke & CO Alarm Placement, Interconnection & Testing - Avenger Security

Home Smoke and CO Alarm Planning: Placement, Interconnection and Testing

Household smoke and carbon-monoxide alarms need the correct locations, compatible equipment and regular testing. NFPA 72 Chapter 29 is one part of the planning framework; the building's adopted codes, manufacturer instructions and local authority determine the final requirements.

Where to begin with smoke alarms

NFPA and the U.S. Fire Administration recommend smoke alarms inside each sleeping room, outside each separate sleeping area and on every level of the home, including the basement. Placement near kitchens, bathrooms, vents and ceiling fans needs the manufacturer's spacing instructions and the rules applicable to the home.

Interconnect compatible alarms

When one interconnected smoke alarm sounds, the other compatible alarms should sound as intended. Do not assume that products from different generations or manufacturers can share an interconnect. Follow the listed model compatibility and permitted device count. Household 120-volt interconnected alarms are different from two-wire detectors on a fire alarm control panel.

Plan CO protection separately

CO alarm locations and interconnection depend on adopted requirements and the installed models. Do not assume that a smoke-only relay reports carbon monoxide events. Choose listed devices suitable for the application and check how occupants will be alerted.

Maintain and test

  • Test each alarm according to its instructions; the U.S. Fire Administration recommends monthly testing.
  • Check the date on each unit and replace smoke alarms at the manufacturer's specified interval, commonly ten years.
  • Replace batteries as the model requires; sealed-battery and hardwired models differ.
  • After a replacement, confirm that compatible interconnected units respond together.

If you want monitored reporting

A household alarm network is not automatically connected to a central station. A compatible relay or listed system detector may be evaluated for monitored reporting, with the panel input, supervision and signal path tested. Commercial or assisted-living occupancies can have separate fire-alarm requirements.

Review NFPA smoke-alarm guidance and the U.S. Fire Administration maintenance guide. For an Austin-area alarm integration, request a site review.

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