The Only CO Detector That Alerts You HOURS Earlier - Without the $200+ Price Tag
AirGuard™️Carbon Monoxide Detector 2.0
# 1
BESTSELLER OF 2025
The Best Quality Money can Buy!
- ✅ Alerts HOURS earlier at 30+ PPM
- ❤️ Trusted by HVAC pros & firefighters
- ⚡ Plug & play — no electrician or tools needed
- ✈️ Protection anywhere – hotels, Airbnbs, RVs
Buy More - Save more
30-Day Money-Back Guarantee
90 Day Returns
Watch Out For Cheap Replicas.
Only our brand guarantees the high quality product used by thousands for home safety.
Less than 1%
of customers claim our 30-Day Money Back Guarantee
Does Your Home Have A Hidden CO Risk?
Answer these questions:
Do you have an attached garage? Every time you start your car, CO can seep through shared walls—even when the garage door is open.
Is your home older than 15 years? Furnace heat exchangers develop cracks over time. Small cracks leak CO for months before causing complete failure.
Do you use natural gas, propane, or oil heat? Any fuel-burning system produces CO. One blocked vent, one malfunction, one crack—and it's in your air.
Do you have a fireplace or wood stove? Creosote buildup, blocked chimneys, and downdrafts push CO back into your home instead of up and out.
If you answered yes to even ONE of these, you're at risk. If you answered yes to TWO or more, you're in the danger zone.
57% of CO Poisoning Victims Had "Working" Detectors That Never Went Off. Don't Let This Be Your Family.
Most CO detectors are built to a legal minimum — they won't wake you up until levels hit 70 PPM or higher. That's not protection. That's damage control.
Even worse? those detectors have a 5-7 year lifespan. After that, the sensor degrades — but the green light stays on. If you haven't replaced yours recently, you may be sleeping next to a device that stopped working years ago.
That's the real reason CO poisoning still sends 50,000 Americans to the hospital every year despite majority of homes having detectors
AirGuard works differently. It triggers at 30+ PPM, well before CO reaches harmful levels — so your family has time to get out, not time to get sick.
Since most CO leaks start as furnace malfunctions, it also tracks the temperature and humidity shifts that signal a problem is forming. The same early warning signs HVAC technicians look for, caught automatically at no extra cost.
AirGuard™️Carbon Monoxide Detector 2.0
Get It By
Get It By
Stories that Started A Movement
Dennis Allen,
64
Verified Buyer
I'm an HVAC technician with 35 years in the industry. After one bad call, I tested my neighbors' detectors with my professional $400 CO tester. Out of 6 houses, FIVE had detectors that were either dead or wouldn't alarm until you were already dying. I urged each one of them to use the detector I use, which is TrueDetect. It alarms early when you can still get out safely, shows real CO readings, and monitors the same metrics I check on service calls. I highly recommend this one, even over the “advanced” 200$ ones
Jessica Lawson,
46
Verified Buyer
Our CO detector was installed in 2013. Twelve years with a green light, and it never crossed my mind to question it, until I had my third.
A newborn changes the way you think about everything. I looked into it and found out CO detectors expire after 5-7 years. Ours had been useless for half a decade and I had no idea.
So I switched to AirGuard. Three weeks later, it went off. A slow CO leak from the furnace, the kind that builds quietly over days. The kind my old detector would have never caught.
I keep thinking about what would have happened if I never bought AirGuard. If you have little ones at home, please don't wait.
Diane Moore,
36
Verified Buyer
We installed AirGuard near our furnace. At 2 AM it started beeping 45 PPM. Fire department found a cracked heat exchanger. Our old detector? Still silent. The firefighter said if we'd waited for that one, we might not have woken up.
Since then I've become that person who won't shut up about CO detectors. My neighbors get annoyed when I bring it up. I don't care. I just can't wrap my head around risking your family's life over a few bucks.
Why ChooseUs?
Here's why we're the industry leader
Why ChooseUs?
Here's why we're the industry leader
AirGuard
Original
|
Others
Knock-off
|
|
|---|---|---|
|
CO Detection
|
||
|
Early Detection
|
||
|
Triple Environment Monitor
|
||
|
10 year Industrial LifeSpan
|
||
|
Travel Easy
|
Money-Back Guarantee
We're so confident in the quality of our product that we offer a satisfaction guarantee. If you're not completely satisfied with your purchase, simply return the item within 30 days for a full refund.
BUY NOW
100% Satisfaction
Fast Shipping
Easy Returns
Money-Back Guarantee
We're so confident in the quality of our product that we offer a satisfaction guarantee. If you're not completely satisfied with your purchase, simply return the item within 30 days for a full refund.
BUY NOW
100% Satisfaction
Fast Shipping
Easy Returns
Frequently Asked Questions
Find your answers to common questions about the Airguard & more.
How do I place an order?
+
To place an order, simply browse our products, add items to your cart, and proceed to checkout. You can review your order before finalizing your purchase.
How do I place an order?
+
To place an order, simply browse our products, add items to your cart, and proceed to checkout. You can review your order before finalizing your purchase.
Is this going to go off constantly and drive me crazy?
+
No. AirGuard uses intelligent algorithms to tell the difference between harmless CO spikes (like briefly running your gas stove) and dangerous CO buildup (like a cracked furnace leaking gas for hours). You'll only get alerts for actual threats, not normal everyday activity.
Where exactly should I put it?
+
Put one within 15 feet of bedrooms (CO poisoning happens most at night while you're sleeping), one near your furnace or main living area, and one on each floor of your home. If you have a fireplace or attached garage, place one nearby. The portable design means you can move it anywhere easily.
Why is this more expensive than the $30 detector at Home Depot?
+
That $30 detector only alarms at 70-150 PPM, when you're already poisoned and potentially unconscious. It also expires after 5-7 years without telling you, so you have no idea if it's even working. AirGuard alerts at 30+ PPM (giving you hours to escape instead of minutes), lasts 10 years, shows real-time readings, and actually tells you when it's time to replace it. The question isn't "why spend $60?" it's "why risk your family's life to save $30?"
Does it work during power outages?
+
Yes. AirGuard has a built-in battery backup that charges when plugged & automatically kicks in when the power goes out, which is exactly when furnaces and heating systems are most likely to malfunction and leak CO. Your protection never stops.
Can I take this when I travel?
+
Absolutely. AirGuard weighs just 8 ounces, fits in any carry-on bag, and works in any standard outlet. This is perfect for hotels (which often have expired or no detectors), Airbnbs (where the owner installed the cheapest detector possible), and RVs (where propane appliances produce CO in tight spaces). Your protection goes wherever you go.
How hard is it to install?
+
It takes 3 seconds. Just plug it into any standard outlet. No electrician, no drilling, no tools, no wiring. That's it.
How loud is the alarm? Will it wake you?
+
The alarm is rated at 85 dB, which is as loud as a blender or city traffic. It's designed to be heard even through deep sleep so you can act immediately.
Is the sensor accurate and dependable?
+
Yes, Airguard uses a professional-grade electrochemical sensor, the same technology trusted by safety professionals. It's far more reliable than low-cost semiconductor sensors found in cheaper models