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AirGuard Home Air Monitor

Live digital readout for CO, natural gas, propane, and room conditions — so you never have to wonder what's in your air.

4.8/5 from 12,400+ reviews
Live PPM display
CO · Gas · Propane
Plug-in, 30-sec setup
Sensor-life indicator
Select your pack
Free US shipping 100-day returns Lifetime warranty
Current batch pricing ends when stock sells out — reorders typically take 4–6 weeks.

What's in the box

AirGuard Monitor
4-in-1 plug-in unit
Quick-Start Guide
Setup in 30 seconds
Placement Cards
Room-by-room tips
Lifetime Support
US-based team

How it compares

Versus the standard CO alarm on most American walls.

 
Standard
AirGuard
Live PPM display
No
Yes
Low-level CO alert
Not until 70+
From 0 PPM
Natural gas / propane
Not detected
Detected
Sensor-life indicator
Silent failure
On-screen
Installation
Ceiling mount
Plug-in
Temp & humidity
No
Yes
100 Day trial

Try AirGuard risk-free for 100 days

If you're not completely satisfied, send it back for a full refund. No restocking fees, no questions. We'll even cover return shipping.

What customers say

4.8
12,400+ reviews
5★
86%
4★
10%
3★
3%
2★
1%
1★
<1%
Verified
Caught something our old detector missed

Plugged one in next to our stove. Noticed it read 14 PPM every time my wife used the oven. Called an HVAC guy. Our range hood wasn't venting. Fixed it — now reads 0. We had CO alarms for 10 years and never knew.

Daniel B. · Columbus, OH · 3 weeks ago
Verified
Bought 4. Gave one to my mom.

Peace of mind for the whole family. My mom lives alone in an old house. I check in on her and ask "what's the number today?" It's become part of our Sunday calls. Best $200 I've spent on home stuff, easily.

Christine L. · Portland, ME · 1 month ago
Verified
Works well, wish the display was slightly brighter

Does exactly what it says. Plugged in, immediately showed readings. Only knock: at night the display is a little dim in dark hallways. Not a dealbreaker. Still better than a green light that tells me nothing.

Marcus T. · Denver, CO · 2 months ago
Verified
30 seconds to install. Not exaggerating.

I'm not handy. I plugged it into an outlet in the hallway. It turned on. That was it. My husband made fun of me for taking a photo of the "0" on the display but honestly, it felt good.

Rebecca O. · Nashville, TN · 2 weeks ago

Common questions

How does it actually install?
Plug it into any standard outlet. That's it. The display turns on immediately and starts taking readings. No batteries, no drilling, no hardwiring, no app required (though one is available if you want notifications).
Where should I place it?
Ideal spots: hallway outside bedrooms, kitchen (a few feet from the stove), near the furnace or water heater, and any room with a fireplace. Avoid placing directly above a stove or within 5 feet of open flames, which can cause false readings.
How accurate is it?
AirGuard uses a professional-grade electrochemical sensor — the same type used by HVAC technicians and gas company inspectors. It's calibrated to detect CO from 0 PPM and is independently tested for accuracy within ±5%.
What's your return policy?
100-day risk-free trial. If you're not satisfied for any reason, send it back for a full refund. We cover return shipping. No restocking fees. No questions.
How fast does it ship?
Orders placed before 2 PM ET ship the same business day. Most US orders arrive within 6–10 business days.
Is my order secure?
Yes. Checkout is encrypted (256-bit SSL) and processed through Stripe and Shop Pay. We never store your card details. Your information is protected under our privacy policy.
Limited batch · ships fast

Know what's in your family's air — before it becomes an emergency.

Over 12,000 families have made the switch. Free shipping, lifetime warranty, 100-day risk-free trial.

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SAFETY DISCLOSURE: AirGuard is a supplemental air-quality monitor and does not replace UL 2034–listed CO alarms required by local building codes. If you suspect a carbon monoxide leak, evacuate immediately and call 911 or your local gas emergency line. Maintain working code-compliant CO alarms on every level of your home.

RESULTS DISCLAIMER: Individual experiences vary. AirGuard provides information about air quality; health outcomes depend on many factors. Consult qualified HVAC and gas-safety professionals for concerns about your home.

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