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Last updated: 2026-05-15

CRITICAL — Act Now

Carbon Monoxide (CO): What Every Homeowner Must Know

CO is a silent killer — colorless, odorless, and lethal at high concentrations. It binds to hemoglobin 200x more than oxygen. Every home with fuel-burning appliances needs a CO detector.

Symptoms to Watch For

If you or your family members are experiencing any of these, carbon monoxide (co) could be the cause:

⚠️ headache
⚠️ dizziness
⚠️ nausea
⚠️ confusion
⚠️ shortness of breath
⚠️ blurred vision
⚠️ loss of consciousness

Your Children Breathe 20,000 Liters of This Air Every Day

Kids breathe more air per pound of body weight than adults. Their lungs are still developing. If carbon monoxide (co) is in your home, they're getting a higher dose than you are. You childproof cabinets and plug outlets — but have you checked what they're breathing?

⚠️ The EPA estimates indoor air can be 2–5× more polluted than outdoor air. Your family breathes 20,000 liters of indoor air every day.

If carbon monoxide (co) is present, every breath could be doing damage you can't see or feel — until it's too late.

Where It Hides in Your Home

Common Sources

  • gas stoves
  • furnaces
  • water heaters
  • fireplaces
  • cars in attached garages
  • portable generators

What the EPA Recommends

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EPA-Recommended Actions

Install CO detectors on every level of your home and outside sleeping areas. Never run generators indoors. Have fuel-burning appliances inspected annually. If alarm sounds, evacuate immediately and call 911.

Sources & Citations

All data on this page is based on publicly available information from the cited sources. This page is not affiliated with or endorsed by the EPA, CDC, or WHO.

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You check the smoke detectors. You lock the doors. But have you tested your air?

Most homeowners test for radon and carbon monoxide — once, maybe never. Yet the EPA says indoor air is 2-5x more polluted than outdoor air. You maintain your car, your HVAC, your roof. The air your family breathes 90% of the time? You're just... guessing.

Test Your Air — Check Price →

Test Kits & Protection

EPA recommends testing as the first step for any suspected carbon monoxide (co) exposure. These are the tools most homeowners start with.

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Your home may have hidden hazards you can't see, smell, or taste.

Our Room-by-Room Scanner checks every corner of your home for 20+ air quality hazards.

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Related Hazards

People Also Ask

What are the symptoms of carbon monoxide (co)?

Common symptoms of carbon monoxide (co) include: headache, dizziness, nausea, confusion, shortness of breath, blurred vision, loss of consciousness. If you are experiencing these symptoms, test your home and consult a healthcare provider.

How do I test my home for carbon monoxide (co)?

Common sources include: gas stoves, furnaces, water heaters, fireplaces, cars in attached garages, portable generators. You can test using the products recommended above. Install CO detectors on every level of your home and outside sleeping areas. Never run generators indoors. Have fuel-burning appliances inspected annually. If alarm sounds, evacuate immediately and call 911.

Is carbon monoxide (co) dangerous to children?

Yes. Children are especially vulnerable to carbon monoxide (co) because their respiratory systems are still developing and they breathe more air per pound of body weight than adults. CO is a silent killer — colorless, odorless, and lethal at high concentrations. It binds to hemoglobin 200x more than oxygen. Every home with fuel-burning appliances needs a CO detector.

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Stop wondering.
Start knowing.

The data is clear. The next step is testing.

The EPA notes that carbon monoxide (co) can only be confirmed through testing — it's often invisible and odorless. A test kit or monitor gives you a real number instead of a guess.

Get Kidde Carbon Monoxide Detector →

1 in 15 US homes has elevated radon levels — the only way to know is to test.

Take the free Air Quality Risk Score quiz and find out what's lurking in your home.

Medical & Environmental Disclaimer

This information is for educational purposes and is based on EPA and CDC guidelines. It is not a substitute for professional environmental testing, medical advice, or remediation services. If you suspect a gas leak or carbon monoxide emergency, evacuate immediately and call 911.

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Indoor air is 2-5× more polluted than outdoors. (EPA)

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