★★★★★ Rated 4.8 / 5 based on 5,895 reviews

Official Air Guard

Stop guessing what’s
in your air –
and protect your family.

A supplemental air monitor that works alongside your UL-listed alarm and shows you what’s really in the air – before it becomes dangerous.

1
Live digital display
See the exact PPM level – updated every second.
2
Alerts at the first sign of danger
Not at 70 PPM after hours of exposure.
3
Detects CO and natural gas
One device, complete coverage.

Get yours today 55% OFF

Firefighter holding up the Air Guard gas and CO detector

★★★★★ — Michael R., Ohio

Verified Buyer Complete Home

First night: 41 PPM. Old detector – green light, completely silent.

“I ordered it mostly to end an argument with my wife. Three days after installing it near the furnace, the display showed 41 PPM at 11 PM. Our previous detector had a green light and made no sound. The gas company was at our door by 7 AM. Cracked heat exchanger. We’d been breathing it for weeks.”

.

LifetimeGuarantee

Fast CustomerSupport

2026 HomeInspector Award

5,000+★★★★★5-Star Reviews

FreeShipping

LifetimeGuarantee

Fast CustomerSupport

2026 HomeInspector Award

5,000+★★★★★5-Star Reviews

FreeShipping

The green light problem

Your detector only has a green light.
Don’t become another headline.

400+

CO deaths a year(CDC)

50,000+

ER visits a year(CDC)

4Hours

Legal alarm delay(UL 2034)

“In over 10,000 home inspections, the most dangerous thing I’ve consistently found isn’t a cracked heat exchanger. It’s the false certainty a green light creates in the people living behind it.”

— Ray Callahan, Certified Home Inspector · 23 Years

Every breath counts.
Cheap detectors wait.
Official Air Guard doesn’t.

Built by first responders

Designed by firefighters.

Shaped by the people who see the aftermath of carbon monoxide first-hand — and built for real homes.

Happy customers unboxing and using the AirGuard detector at home

See what’s in your air

Protect your family now.

The air in your home is the same whether the detector alarms or not. The only question is whether you can see what’s in it.

A real number. Right now.

The digital display shows live CO concentration in parts per million and natural gas presence — updated continuously, every second.

Tested to UL 2034 & UL 1484

Supplemental monitor with real-time display, built and tested to recognised safety standards.

The one-second install

Plug AirGuard into any standard wall outlet. That’s the entire installation process.

What makes the difference

Cheap & Old

Shows real-time CO levels

Alerts you early

Detects natural gas + propane

Easy install

Tested to UL 2034 & UL 1484

Protect your family.

Get your Official AirGuard today!

Apartment Package

Rated 4.8/5 by our customers

$ 64,50

PER AIRGUARD

Title

Total: ~~$̶̶286.00~~ $129
FREE Shipping

Full Home Package

Rated 4.8/5 by our customers

$57.25

PER AIRGUARD

Title

Total: ~~$̶509.00~~ $229
FREE Shipping

Best Value

Family
Package

Rated 4.8/5 by our customers

$44.90

PER AIRGUARD

Title

Total: ~~$̶̶798.00~~ $359
FREE Shipping

REAL VERIFIED RESULTS

MEET THE HAPPY AMERICAN CUSTOMERS

NOTE: All reviews are paying customers and have been authenticated and verified

Thomas H., Pennsylvania · Verified Buyer

I Installed It To End An Argument. I Lost The Argument.

My wife had been asking me to replace our detector for months. I said ours was fine — eight months old, green light, tested regularly. I ordered ClearAir Guard to prove her right or wrong. She was right. 28 PPM near the furnace on night three. Gas company at midnight. I don't question her instincts about home safety anymore.

James & Patricia K., North Carolina · Verified Buyer

Brand New House. Week One.

We assumed new construction meant no issues. ClearAir Guard showed low-level CO from an improperly calibrated water heater flue within the first week of moving in. Four-month-old house. Builder sent someone immediately. The included detector showed nothing the entire time.

Eleanor W., Virginia · Verified Buyer

74 Years Old. Did It Myself In Under A Minute.!

My son sent me ClearAir Guard after my neighbor ended up in hospital. I plugged it in without calling anyone for help. It took less time than making my morning coffee. I look at the zeros every day. My son doesn't have to worry anymore. Neither do I.

Frank D., Tennessee · Verified Buyer

22 Years In HVAC. This Is What's In My Home.

I've crawled through more crawl spaces than I can count. I've seen what slow leaks do to families who trusted their green lights. ClearAir Guard is what I installed in my own house and what I put in my daughter's apartment before she spent a single night there.

FAQs

My furnace was just serviced. Do I still need this?

Annual service reduces risk significantly — it doesn't eliminate it. Heat exchangers can develop fractures between service visits. Gas connections can shift with temperature changes. Flues can become partially blocked without triggering anything visible during inspection. Real-time monitoring covers what scheduled maintenance can't: what's happening tonight, between service calls.

Does AirGuard replace my existing carbon monoxide alarm?

No — and it's not meant to. AirGuard is a supplemental monitor designed to work alongside your primary UL-listed CO alarm. Think of it as an extra layer of visibility: while your primary alarm is there for emergencies, AirGuard lets you see the actual CO and gas levels in real time, from 0 PPM, every day. We always recommend keeping a certified primary alarm installed on every level of your home.

Will it alarm when I'm cooking?

ClearAir Guard's professional-grade sensor is calibrated to distinguish between normal cooking activity and genuine CO or gas accumulation. It is designed to alert you to actual danger — not to react to steam, humidity fluctuation, or the kind of minor air quality variation that causes false alarms in cheaper sensors.

How many units does my home actually need?

One per critical area is our recommendation: near your primary heat source, in the kitchen, in or immediately outside sleeping areas, and in any space where family spends significant time. The Complete Home 4-Pack covers the critical areas of most family homes. Larger or multi-story homes benefit from additional units — The Family Plan is designed for that.

Is AirGuard tested for safety?

Yes. AirGuard has been independently tested to the UL 2034 and UL 1484 safety standards for carbon monoxide and fuel gas detection. As a supplemental monitor, it's built to complement your primary CO alarm, giving you continuous real-time visibility into your home's air.

How long does it take to arrive?

All orders ship within 24 hours of purchase. Standard delivery is 3–5 business days across the continental United States. Free shipping applies to all package orders automatically at checkout.

Choose package now

GET YOUR 55 % OFF

Stop guessing what’sin your air –and protect your family.

Live digital display

Alerts at the first sign of danger

Detects CO and natural gas

First night: 41 PPM. Old detector – green light, completely silent.

Your detector only has a green light.Don’t become another headline.

Every breath counts.Cheap detectors wait.Official Air Guard doesn’t.

Designed by firefighters.

Protect your family now.

Apartment Package

$ 64,50

Full Home Package

$57.25

Family Package

$44.90

MEET THE HAPPY AMERICAN CUSTOMERS

NOTE: All reviews are paying customers and have been authenticated and verified

I Installed It To End An Argument. I Lost The Argument.

Brand New House. Week One.

74 Years Old. Did It Myself In Under A Minute.!

22 Years In HVAC. This Is What's In My Home.

FAQs

Stop guessing what’s
in your air –
and protect your family.

Your detector only has a green light.
Don’t become another headline.

Every breath counts.
Cheap detectors wait.
Official Air Guard doesn’t.

Family
Package