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Where to Place Carbon Monoxide Detectors at Home

Updated October 2026

Putting carbon monoxide detectors in the right places makes a big difference. This simple guide follows advice from the NFPA and the CPSC, with tips for using CarbonOne Safe.

The three must-have spots

  1. Outside every sleeping area. Put an alarm in the hallway near the bedrooms, so it wakes everyone up.
  2. On every level of the home, including the basement if someone sleeps there.
  3. In a central spot on each floor, where the sound carries.

The NFPA says it is best if alarms are interconnected, so when one sounds, they all sound.

Room by room

RoomWhat to do
BedroomsAlarm in the hallway outside; a monitor inside a bedroom with a gas appliance nearby
Living roomOne central alarm or monitor per floor
Furnace or water heater roomA monitor nearby, like CarbonOne Safe, for a live reading
KitchenKeep a few feet away from the stove to avoid false alarms
GarageAn alarm in the room next to an attached garage
BasementYes, if someone sleeps there or it has a gas appliance

Spots to avoid

  • Right next to stoves, fireplaces or heaters
  • Bathrooms and other very damp rooms
  • Behind furniture, curtains or doors
  • In direct sunlight or next to air vents
  • Attics, unless someone sleeps there (CPSC)

Where CarbonOne Safe fits in

CarbonOne Safe plugs into a wall outlet, so it is easy to place near your gas appliances and in rooms you use most. The seller suggests one on each floor, one near gas appliances and one outside the bedrooms: most homes use 2 to 4. Keep your UL 2034-listed alarms in the must-have spots above, and add CarbonOne Safe where a live reading helps most.

Keep everything working

  • Test alarms once a month.
  • Replace alarm batteries once a year, or as the maker says (CPSC).
  • Replace detectors as the maker says or every 5 years (CDC).
  • Glance at your CarbonOne Safe reading when the heating is on.

Learn more: carbon monoxide safety tips and CarbonOne Safe price and guarantee.

Get CarbonOne Safe

See also: how to set up CarbonOne Safe.

Frequently asked questions

Where is the best place for a carbon monoxide detector?

Outside each sleeping area and on every level of the home, in a central spot.

Should a carbon monoxide detector go in the kitchen?

Keep it a few feet away from the stove to avoid false alarms from cooking.

How many carbon monoxide detectors do I need?

At least one on every level and one outside each sleeping area. Many homes add monitors near gas appliances too.

More CarbonOne Safe guides

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Independent deals page. Not affiliated with CarbonOne. We may earn a commission when you buy through links on this page. Check that any carbon monoxide alarm you rely on is UL 2034 listed, and test it regularly.