A supplemental air monitor that works alongside your UL-listed alarm and shows you what’s really in the air – before it becomes dangerous.
See the exact PPM level – updated every second.
Not at 70 PPM after hours of exposure.
One device, complete coverage.
“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.”
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CO deaths a year(CDC)
ER visits a year(CDC)
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
Shaped by the people who see the aftermath of carbon monoxide first-hand — and built for real homes.
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.
The digital display shows live CO concentration in parts per million and natural gas presence — updated continuously, every second.
Supplemental monitor with real-time display, built and tested to recognised safety standards.
Plug AirGuard into any standard wall outlet. That’s the entire installation process.
Every review below is from a verified buyer.
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.
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.
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.
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.
