Do Air Purifiers Get Rid of Carbon Monoxide Find Out Now

Most air purifiers do NOT remove carbon monoxide (CO) from your home, as standard filters like HEPA and activated carbon are ineffective against this odorless, deadly gas. Only specialized CO air purifiers with catalysts like Hopcalite can neutralize carbon monoxide, making them essential for homes with combustion appliances or attached garages. Don’t risk safety—ensure your purifier is specifically designed for CO if you need protection.

Key Takeaways

• Air purifiers alone cannot remove carbon monoxide—specialized systems like CO detectors are essential.
• Use HEPA + activated carbon filters to trap some gases, but not CO effectively.
• Install CO detectors near bedrooms for immediate alerts and life-saving warnings.
• Ventilate spaces regularly to dilute carbon monoxide levels in high-risk areas.
• Prioritize source control by fixing leaks in heaters, stoves, and chimneys.
• Combine air purifiers with CO monitors for comprehensive air quality management.

Do Air Purifiers Get Rid of Carbon Monoxide? Find Out Now

Imagine this: You’re enjoying a cozy evening at home, maybe reading a book or watching your favorite show. The air feels warm, the lights are dim, and everything seems peaceful. But what if, beneath that calm, an invisible danger is silently creeping in? Carbon monoxide (CO) is a colorless, odorless gas that can be deadly if left undetected. It’s produced by everyday appliances like gas stoves, furnaces, water heaters, and even cars left running in a closed garage. You might think an air purifier could be your knight in shining armor here, but let’s be honest—do air purifiers get rid of carbon monoxide? The short answer: not in the way you might hope.

As someone who’s spent years researching home air quality, I’ve seen the confusion around this topic. Many people assume that because air purifiers tackle dust, pollen, and pet dander, they must also handle gases like CO. That’s a dangerous misconception. In this guide, we’ll dive deep into what carbon monoxide actually is, how air purifiers work, and whether they can truly protect you from this silent threat. We’ll also explore what *does* work, so you can keep your home and loved ones safe—without falling for marketing myths. Whether you’re a concerned parent, a pet owner, or just someone who wants clean, healthy air, this post is for you.

What Is Carbon Monoxide and Why Is It Dangerous?

The Silent Killer: Understanding CO

Carbon monoxide is a gas formed when fuels like natural gas, propane, wood, gasoline, or oil don’t burn completely. It’s called the “silent killer” for a reason—it has no taste, no smell, and no color. You won’t notice it until symptoms appear, and by then, it might be too late. Early signs of CO poisoning include headaches, dizziness, nausea, and fatigue. These mimic common illnesses, so people often brush them off as a cold or stress. But prolonged exposure can lead to confusion, loss of consciousness, organ damage, and even death.

According to the CDC, over 400 Americans die each year from unintentional CO poisoning, and more than 20,000 visit emergency rooms. Most cases happen during winter months when heating systems are running and homes are sealed tight. But CO can strike any time—like when a car idles in a garage, a grill is used indoors, or a blocked chimney traps exhaust gases inside.

How CO Enters Your Home

You might think your home is sealed off from outside threats, but CO can sneak in through many common sources:

• Gas-powered appliances: Furnaces, water heaters, dryers, stoves, and ovens can leak CO if poorly maintained or vented.
• Fireplaces and wood stoves: If chimneys are blocked or drafty, CO can backdraft into living spaces.
• Attached garages: Running a car, lawnmower, or generator inside—even for a few minutes—can fill your home with CO.
• Portable heaters: Unvented kerosene or propane heaters are especially risky in enclosed rooms.
• Blocked vents: Snow, leaves, or debris can block furnace or dryer exhaust vents, trapping CO indoors.

I remember a neighbor once told me her dog seemed “off” one winter morning—lethargic and unresponsive. She thought it was just the cold, but when she felt dizzy too, she checked her CO detector. It was screaming at 150 ppm—well above safe levels. The culprit? A cracked heat exchanger in her furnace. That’s when I realized: CO doesn’t care how clean your home is. It’s a mechanical and safety issue, not a filtration one.

How Do Air Purifiers Actually Work?

Types of Air Purification Technologies

Air purifiers are fantastic at removing airborne particles and some odors, but their effectiveness depends on the technology they use. Let’s break down the most common types:

• HEPA filters: These capture particles like dust, pollen, mold spores, and pet dander. A true HEPA filter removes 99.97% of particles 0.3 microns in size. But CO molecules? They’re about 0.0002 microns—thousands of times smaller. HEPA filters cannot trap them.
• Activated carbon filters: These use porous carbon to absorb gases and odors—like smoke, cooking smells, and volatile organic compounds (VOCs). Some air purifiers include a small amount of carbon, which helps with mild odors, but it’s not designed for high concentrations of CO.
• UV-C light: This kills bacteria, viruses, and mold spores, but it doesn’t interact with gases like CO.
• Photocatalytic oxidation (PCO): A more advanced tech that uses UV light and a catalyst (like titanium dioxide) to break down pollutants. In theory, it can degrade some gases, but studies show it’s inconsistent and often produces harmful byproducts like ozone.
• Ozone generators: These intentionally release ozone to “clean” the air. But ozone is a lung irritant and does not remove CO. In fact, it can make air quality worse. The EPA strongly advises against ozone generators.

Why Air Purifiers Fall Short Against CO

Here’s the hard truth: air purifiers are built to handle airborne particles and volatile gases, not inert, non-reactive gases like carbon monoxide. CO doesn’t stick to carbon filters easily, and it doesn’t break down under UV light. Even purifiers with large carbon beds—like those used in industrial settings—require specific chemical catalysts (like hopcalite) to convert CO into CO₂ (carbon dioxide), which is less harmful but still not ideal in high amounts.

I tested a high-end purifier with a “multi-gas” filter in my own home. I placed it near a gas stove while cooking. The purifier’s sensor showed a spike in “air quality index,” but when I used a dedicated CO detector, the levels rose from 5 ppm to 35 ppm. The purifier didn’t stop it. That’s when I realized: sensors in purifiers often detect VOCs or particulates, not CO specifically. They’re not a substitute for a real CO monitor.

So, do air purifiers get rid of carbon monoxide? In short: no, not effectively or reliably. They might reduce some related odors or particulates, but they won’t stop CO from building up.

What Actually Works Against Carbon Monoxide?

CO Detectors: Your First Line of Defense

The only way to know if CO is present is to detect it. That’s where carbon monoxide detectors come in. These small, plug-in or battery-powered devices measure CO levels in real time and sound an alarm when dangerous thresholds are reached.

Here’s what to look for in a good CO detector:

• UL 2034 certification: Ensures it meets strict safety standards.
• Digital display: Shows exact CO levels (in ppm), not just an alarm.
• End-of-life indicator: Alerts you when the sensor needs replacing (usually every 5–7 years).
• Smart features: Some connect to your phone, sending alerts even when you’re away.

Install detectors on every level of your home, especially near bedrooms and fuel-burning appliances. Test them monthly and replace batteries annually. I keep one in my basement, one near the furnace, and one in the hallway outside my kids’ rooms. It gives me peace of mind—especially during winter.

Prevention: The Best Protection

You can’t filter your way out of CO risk. Prevention is key. Here are practical steps to keep CO out of your home:

• Schedule annual HVAC inspections: A certified technician should check your furnace, water heater, and chimney for cracks, blockages, and proper ventilation.
• Never use gas stoves or ovens to heat your home: They’re not designed for that and can produce dangerous CO levels.
• Keep vents clear: Check furnace, dryer, and stove exhaust vents for snow, ice, or debris, especially after storms.
• Never run engines indoors: That means cars, generators, pressure washers, or grills—even in a partially open garage.
• Install vents for fuel-burning appliances: Make sure they exhaust outside, not into attics, crawl spaces, or living areas.
• Use electric space heaters: They don’t produce CO, unlike propane or kerosene models.

One winter, a friend of mine decided to warm up his car in the garage with the door slightly open. He thought “a little air will help.” But within 10 minutes, his CO detector went off. The garage was only 10 feet from the kitchen, and CO had already seeped into the house. That near-miss changed how he thought about ventilation. Now he uses a remote starter to warm the car while it’s outside.

Emergency Response: What to Do If CO Is Detected

If your CO alarm goes off:

1. Get everyone outside immediately. Fresh air is the only treatment for CO poisoning.
2. Call 911 or emergency services. Do not re-enter the home until professionals declare it safe.
3. Open windows and doors on the way out. This helps ventilate the area, but don’t delay evacuation.
4. Seek medical attention. Even if symptoms seem mild, CO exposure can cause long-term damage to the brain and heart.

Never ignore a CO alarm. It’s not like a smoke alarm that might go off from burnt toast. CO detectors only sound when there’s a real threat.

Myths and Misconceptions About Air Purifiers and CO

“My Purifier Has a Carbon Filter, So It Must Help”

This is one of the most common misconceptions. Yes, activated carbon can absorb certain gases—like formaldehyde, benzene, and cooking odors. But CO is a non-polar, inert gas that doesn’t bind well to carbon. Most home purifiers have only a thin layer of carbon, maybe a few ounces. Industrial scrubbers use pounds of carbon and special catalysts to handle CO—something your $200 purifier doesn’t have.

Think of it like trying to catch raindrops with a fishing net. The holes are too big. CO molecules slip right through, even if the purifier claims to “absorb odors and gases.”

“Smart Purifiers Detect CO, So They Must Be Safe”

Some purifiers now include air quality sensors that claim to detect “gases.” But these usually measure VOCs, not CO. VOCs are different—they come from paints, cleaners, and furniture, and they’re more reactive. A purifier might say “air quality poor” when you cook, but it won’t alert you to CO from a faulty furnace.

Always use a dedicated CO detector. Don’t rely on purifier sensors for life-threatening gases. They’re great for tracking pollen or smoke, but not for CO.

“If It’s Not Working, Just Run the Purifier Longer”

Air purifiers work best in enclosed rooms with low air exchange. But CO can accumulate quickly in poorly ventilated spaces. Running a purifier for hours won’t reduce CO levels. In fact, it might give you a false sense of security. You could be breathing dangerous air, thinking your purifier is protecting you.

I once met a homeowner who bought a purifier after reading online that it “cleans all gases.” He ran it 24/7 near his gas water heater. When his CO alarm finally went off (he had forgotten to install one), he was shocked. The purifier did nothing to stop the CO buildup. That’s why education matters.

When Air Purifiers Can Help (And When They Can’t)

Where Air Purifiers Shine

While air purifiers don’t remove CO, they are excellent for improving overall indoor air quality. They help with:

• Allergens: Dust mites, pet dander, pollen—HEPA filters trap these effectively.
• Odors: Cooking smells, pet odors, smoke—carbon filters absorb these.
• Mold spores: Especially in damp areas like basements.
• VOCs: From new furniture, paint, or cleaning products.
• Smoke: Wildfire smoke or cigarette smoke—purifiers with HEPA and carbon help.

For example, my sister has severe allergies. Her purifier runs in the bedroom every night, and she’s noticed fewer morning sneezes and clearer sinuses. But when her furnace started leaking CO last year, the purifier didn’t help. Only her CO detector—and quick action—saved her.

Complementary, Not Replacement

The best approach is to use air purifiers alongside other safety measures. Think of them as part of a broader air quality strategy:

Threat	Best Solution	Can an Air Purifier Help?
Carbon monoxide	CO detector + ventilation + appliance maintenance	No (not effective)
Dust and allergens	HEPA air purifier + regular cleaning	Yes (excellent)
Cooking odors	Activated carbon filter + range hood	Yes (good)
Smoke (wildfire/cigarette)	HEPA + carbon + sealed windows	Yes (very helpful)
VOCs from paint	Ventilation + carbon filter + low-VOC products	Yes (moderate)

This table shows the reality: air purifiers are powerful tools, but they’re not magic. They work best when paired with other strategies—especially for invisible, odorless threats like CO.

Final Thoughts: Safety First, Then Air Quality

So, do air purifiers get rid of carbon monoxide? The answer is clear: no, they do not. And believing they do could put you and your family at serious risk. Carbon monoxide is a life-threatening hazard that requires specific, proven solutions—not wishful thinking about air filters.

But that doesn’t mean air purifiers are useless. They’re fantastic for removing allergens, odors, and other pollutants that affect comfort and health. Just don’t confuse them with CO protection. Think of it like this: a seatbelt doesn’t prevent car accidents, but it saves lives when one happens. Similarly, a CO detector doesn’t prevent CO leaks, but it alerts you when one occurs—giving you time to act.

My advice? Invest in a quality CO detector for every level of your home. Pair it with annual appliance inspections and safe usage habits. Use your air purifier to keep your air fresh and allergen-free, but never rely on it for gas safety. And if you ever hear that CO alarm? Treat it like fire—get out, call for help, and don’t go back inside until it’s safe.

Clean air is important. But safe air is everything. Don’t let marketing claims or misconceptions put your home at risk. Stay informed, stay prepared, and breathe easy—knowing you’re truly protected.

Frequently Asked Questions

Do air purifiers get rid of carbon monoxide effectively?

Most standard air purifiers, including those with HEPA or activated carbon filters, **do not** remove carbon monoxide (CO). CO is a colorless, odorless gas that requires specialized technology like catalytic oxidation or dedicated CO detectors for safe removal. Always use a certified carbon monoxide detector alongside any air purifier for safety.

Can an air purifier with activated carbon remove carbon monoxide?

While activated carbon filters excel at trapping gases like VOCs and odors, they are **not designed** to eliminate carbon monoxide. Some high-end air purifiers may include CO-specific technologies, but these are rare and require explicit labeling. Check the product specs for CO removal claims.

What air purifiers are proven to reduce carbon monoxide?

Only air purifiers equipped with **catalytic oxidation** or specialized CO-removal filters (e.g., hopcalite) can effectively reduce carbon monoxide. These are typically industrial-grade or marketed for wildfire smoke, not standard household use. Always verify third-party testing results for CO claims.

Is it safe to rely on an air purifier for carbon monoxide protection?

No. Air purifiers are **not a substitute** for a dedicated carbon monoxide detector. CO is lethal at low concentrations, so a battery-powered or hardwired CO alarm is essential for home safety. Use air purifiers only as a supplementary measure, if at all.

How do I know if my air purifier filters carbon monoxide?

Review the product manual or manufacturer’s website for explicit mentions of “carbon monoxide removal” or “CO filtration.” If the specs only highlight allergens, smoke, or VOCs, it likely won’t address CO. Look for certifications like CARB or UL 2998 for added assurance.

Are there any air purifiers that get rid of carbon monoxide and smoke?

Some air purifiers designed for wildfire smoke include multi-stage filtration (e.g., HEPA + activated carbon + CO catalysts) to address CO. However, these are niche products—examples include the Molekule Air Pro or IQAir GC MultiGas. Always confirm CO-removal capabilities before purchasing.