Carbon Monoxide detectors

A person with dark hair holding their head with both hands, sitting or kneeling on a wooden floor with sunlight creating patterns through blinds or a window.

Step 2: Carbon Monoxide Detectors 

What You Need to Know

Carbon monoxide (CO) is called "the silent killer" because you can't see it, smell it, or taste it. Every year, more than 400 Americans die from unintentional CO poisoning, and another 100,000 visit emergency rooms, according to the CDC.

The good news? CO detectors are inexpensive and incredibly effective. If you have fuel-burning appliances or an attached garage, you need them.

Where They Should Be

The Consumer Product Safety Commission (CPSC) recommends:

  • Outside each sleeping area

  • On every level of your home

  • In the basement

  • Near (but not directly next to) fuel-burning appliances

Installation tips:

  • Follow manufacturer instructions, ex: some work best on walls, others on ceilings

  • Keep at least 15 feet from fuel-burning appliances to prevent false alarms

  • Don't install in garages, kitchens, or extremely humid areas like bathrooms

What to Do Right Now

Test every CO detector:

  • Press the test button—you should hear a distinct alarm pattern (usually 4 beeps)

  • Check the digital display if your model has one

  • Replace batteries according to manufacturer instructions

  • Replace the entire unit every 5-7 years (check the back for expiration date)

Know the alarm pattern:

  • 4 beeps, pause, 4 beeps = CO detected, evacuate immediately

  • Single chirp every 30-60 seconds = low battery

  • Continuous chirping = end of unit life, replace immediately

If your alarm goes off:

  1. Don't ignore it or "wait to see" if it goes off again

  2. Get everyone (including pets) outside immediately

  3. Call 911 from outside your home

  4. Don't re-enter until emergency responders say it's safe

Resources

Home Safety Essentials