400 Americans Will Die From Carbon Monoxide This Year. Every Single One Had A Working Detector On The Wall.

A firefighter explains why the CO detector on almost every American wall is doing exactly what it was built to do — and why that’s the problem.

Ethan

Firefighter · 13 years on the job

THE GREEN LIGHT IS ON.

BUT DO YOU REALLY KNOW WHAT YOUR FAMILY IS BREATHING?

Your carbon monoxide detector is glowing green.

So you assume everything is fine.

But here's the question most homeowners never ask:

What is the CO level in your home right now?

0 PPM?

5 PPM?

12 PPM?

25 PPM?

If your detector doesn't show you the number, you don't actually see what's happening in the air around you.

Carbon monoxide is invisible.

Odorless.

And impossible to detect with your senses.

That's what makes it dangerous.

A green light can tell you that your alarm hasn't activated.

But it can't tell you what's happening between “normal” and “alarm.”

CO Guard was built to give you more information.

A GREEN LIGHT TELLS YOU ONE THING.

A NUMBER TELLS YOU MORE.

Traditional alarms are designed to alert you when their alarm conditions are reached.

Until then?

You may simply see a green light.

And that's where many homeowners stop asking questions.

The test button can confirm that the alarm can sound.

But it doesn't give you a continuous numerical reading of the air around you.

Think about the difference.

A green light says:
“Nothing has triggered the alarm.”

A real-time reading says:
“Here's what we're detecting right now.”

When the threat is invisible, information matters.

Don't just know that your alarm is on. Know what it's reading.

IMAGINE IT'S 2:13 AM.

Everyone is asleep.

Your kids are in the next room.

The furnace is running.

The house looks completely normal.

No strange smell.

No visible smoke.

No obvious warning.

Your detector is still showing green.

You look at it.

Everything appears normal.

But ask yourself:

WHAT NUMBER IS IT READING?

If your detector doesn't show the number...

YOU DON'T KNOW.

And that's the blind spot you don't want when your family is asleep.

You can't see carbon monoxide.

You can't smell it.

You can't feel it coming.

So why rely on a light alone?

THAT'S WHY WE BUILT CO GUARD.

STOP GUESSING. START SEEING.

Meet CO Guard — a smarter way to monitor the air inside your home.

Instead of making you wait for a warning, CO Guard puts the reading directly in front of you.

REAL-TIME CO DISPLAY

See your current carbon monoxide level at a glance.

CO + GAS MONITORING

Monitor carbon monoxide, natural gas, and propane with one device.

AUDIBLE + VISUAL ALERTS

When detected levels reach the device's alarm conditions, CO Guard provides both visual and audible warnings.

SIMPLE INSTALLATION

Designed for everyday homeowners — without a complicated installation process.

You shouldn't have to be an expert to know what's happening in your own home.

SEE IT. KNOW IT. ACT ON IT.

SEE THE NUMBER.

BECAUSE ZERO SHOULD LOOK LIKE ZERO.

Think about the difference.

Traditional detector:

“The light is green, so I guess we're okay.”

CO Guard:

0 PPM

You can actually see the reading.

And if the reading changes?

You can see that, too.

No guessing.

No wondering what the green light really means.

No waiting for a problem to become an emergency before you know something has changed.

THE NUMBER IS RIGHT THERE.

Right where you can see it.

Right where your family needs it.

KNOW WHAT YOUR AIR IS READING.

BUILT FOR THE MOMENT YOU HOPE NEVER COMES.

PROFESSIONAL-GRADE SENSING. SIMPLE HOME PROTECTION.

CO Guard was designed around one simple idea:

You shouldn't have to wait for a crisis to know what's happening.

Professional-grade sensing technology continuously monitors the environment around you.

The display keeps the reading visible.

And when detected levels reach the device's alarm conditions, CO Guard provides both audible and visual warnings.

Because when something invisible changes inside your home...

YOU WANT TO KNOW.

Not later.

Not after you smell something.

Not after you hear someone else's alarm.

You want the information when it matters.

SEE THE READING.

HEAR THE WARNING.

TAKE ACTION.

ONE DETECTOR CAN'T WATCH EVERY ROOM.

PROTECT THE PLACES YOUR FAMILY ACTUALLY SLEEPS.

Carbon monoxide and gas can move through a home.

That's why whole-home coverage matters.

Consider placing detectors in the areas recommended by your local safety guidance and the product's installation instructions — especially near sleeping areas and potential sources.

MORE COVERAGE. MORE PEACE OF MIND.

Whether you're protecting an apartment or a larger family home, multiple units can help you monitor more areas.

Don't just protect the room you're standing in.

PROTECT THE PEOPLE SLEEPING IN THE ROOMS YOU CAN'T SEE.

BUILD YOUR HOME COVERAGE

1 UNIT

Start with essential coverage.

2 UNITS

Cover more living and sleeping areas.

3+ UNITS

Build broader home coverage.

CHOOSE THE SETUP THAT FITS YOUR HOME.

ONE LAST QUESTION.

IS YOUR DETECTOR GREEN?

Good.

NOW ASK YOURSELF:

WHAT NUMBER IS IT READING?

You can't smell carbon monoxide.

You can't see it.

And you shouldn't have to wait for an emergency before finding out what's happening in the air around your family.

DON'T JUST LOOK FOR A GREEN LIGHT.

SEE THE NUMBER.

KNOW YOUR AIR.

PROTECT YOUR HOME WITH CO GUARD.

100-DAY SLEEP IN PEACE GUARANTEE

Try CO Guard with confidence.

LIFETIME WARRANTY

Built to protect your home for years to come.

FREE SHIPPING ON ORDERS $109+

Convenient delivery from our U.S. warehouse.

YOUR FAMILY DESERVES MORE THAN A GREEN LIGHT.

THEY DESERVE TO KNOW.

See How It Works