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How to Install Smart Smoke and CO Detectors

Ask This Old House master electrician Scott Caron installs smart smoke and carbon monoxide detectors in this edition of DIY Smarts.

Steps for Installing Smart Smoke and CO Detectors:

  1. Before any electrical work, always shut the power off at the main breaker.
  2. Program each smoke and CO detector following the instructions via the app. You can label each one by room description (kitchen, living room, etc.)
  3. Remove the old smoke detector from the ceiling with a flathead screwdriver. Hold on to the screws to reuse for the new plates.
  4. Cap the existing interconnect wire with a wire nut as it will no longer be needed.
  5. Connect the pigtail provided by the manufacturer to the house’s power supply. Cover with a wire nut.
  6. Install the new mounting plate to the electrical box, using the flathead screwdriver and the existing screws.
  7. Plug the smoke and CO detector in, then snap it into the mounting bracket.
  8. Repeat for all rooms in the house.
  9. Turn the power back on and test each device using the “test” button.
Shop Smoke and CO Detectors at The Home Depot