01 — PLUG IN
Any US outlet. 30 seconds.
Standard NEMA 5-15. No tools, no wiring, no batteries to swap. The unit starts reading the room the moment you plug it.
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Home›Detectors›Aegis Home Safe Monitor
Live PPM
CO · Gas · RH · Temp
Today · 6:42 AM
CO climbed +8 ppm while furnace cycled.
- Live PPM display — see your air, not just hear a siren.
- 3 threats, 1 plug — CO + natural gas + propane.
- 30-second install — any US outlet, no tools.
- 365-day test drive — + lifetime warranty.
CO doesn't start at 70 PPM.
Most alarms do.
Aegis Home Safe is a real-time CO + combustible gas monitor that shows what basic alarms hide — live PPM, %LEL, temperature and humidity from any outlet.
★★★★★4.8· 2,847 verified buyers
$139
$199
SAVE 30%2-Pack · Apartments & Condos · $69.50/unit
or 4 interest-free payments of $34.75 with Shop Pay / Klarna
VISAMCAMEXPAYPALAPPLE PAYKLARNA
Free US shipping
2–5 business days
365-day test drive
Full refund, no questions
Lifetime warranty
We replace it. Forever.
Plug-in only — no internal battery. Keep your code-required CO alarm active for power-outage protection. Aegis Home Safe adds live visibility; it doesn't replace code-required alarms.
100k+
CDC · Annual
U.S. ER visits for non-fire CO exposure.
400+
CDC · Annual
U.S. deaths from unintentional, non-fire CO poisoning.
70ppm
UL2034
The threshold a basic alarm is tested to sound at — within 60–240 min.
10ppm
Aegis · Pre-alert
The reading we show on the LCD — long before symptoms arrive.
Sources: CDC carbon-monoxide overview · CPSC CO alarm conformance phase I report.
From real Aegis Home Safe homes
Plugged in, reading the room.
Saw 24 ppm at breakfast
@david.t · Bend, OR
Day 1 unbox · kitchen
@sarah_m · Madison, WI
Furnace room baseline
@mike.h · Pittsburgh, PA
Set up at mom's condo
@lisa_w · Albany, NY
Entryway · always on
@priya_s · Austin, TX
How it works
Plug it in. See the number. Act before the siren.
Built like an instrument, not a gadget. The LCD shows live CO, gas, temperature and humidity readings at the outlet.
02 — SEE LIVE PPM
CO, %LEL, temp, humidity.
The LCD shows every reading 24/7 with three status LEDs and a hardware self-test. If a value drifts, you'll see it before you'd ever feel it.
03 — STAY AHEAD
Live readings from 10 PPM.
Low-level readings are visible on the LCD. Audible alarms follow UL2034 thresholds; keep your code-required CO alarms active.
The 70 PPM problem
Your old alarm is allowed to wait up to four hours before it sounds.
Most UL-listed CO alarms are tested to sound at 70 PPM within 60–240 minutes. At 150 PPM that window narrows to 10–50 minutes. They do their job well — but that job is "scream at danger," not "show drift."
Aegis Home Safe is built differently. It shows the number from 10 PPM and up, so you see CO climb before symptoms do. Your existing alarm stays. This adds the picture it was never asked to draw.
Old alarm
"All good."
Silent until UL threshold.
Aegis Home Safe
32 PPM · rising
You see drift hours earlier.
TEMP72°F
CO18PPM
GAS0%LEL
RH35%
POWERFAULTALARM
SELF-TEST
LIVE SIMULATION · 24-HOUR ROLLING WINDOW
Threshold map
The number matters before the siren.
Drag the marker. See which standards apply at each PPM — and how long a UL2034 alarm is allowed to wait.
Carbon monoxide reading
35ppm
Zone
Caution
Reaches EPA 1-hour ambient.
0
baseline
9
EPA 8h
35
EPA 1h
50
OSHA PEL
70
UL 60-240 min
150
UL 10-50 min
200+
UL 4-15 min
Sources: EPA NAAQS · EPA IAQ · OSHA Chemical Sampling 462 · NIOSH · UL2034 alarm test windows (CPSC).
Room calculator · 60 seconds
How many do you actually need?
A hallway reading isn't a full-home picture. Your specific risk depends on layout and appliances.
1 / 5
From the homes Aegis Home Safe is already in
"The first night I saw the number climb. I knew which appliance was off."
★★★★★
4.8 avg · 2,847 verified buyers
★★★★★
"Saw 24 ppm in the kitchen at breakfast."
Turns out my stove was lit wrong. Old alarm never said a word. I would have never known.
Maya R. · Bend, OR
✓ VERIFIED
★★★★★
"Bought it for my mom's condo."
She has a battery alarm but her furnace is old. Now I can call her if the PPM gets weird overnight.
Jordan P. · Albany, NY
✓ VERIFIED
★★★★★
"I keep one in the RV."
Cabin in the winter, RV in the summer. The %LEL line on propane is what sold me.
Tom & Karen H. · Boise, ID
✓ VERIFIED
★★★★
"Wish it had a battery backup."
Knock one star for that. Otherwise the readout is honestly addictive. I check it like a thermostat.
Andre K. · Pittsburgh, PA
✓ VERIFIED
★★★★★
"Replaced my old white plastic puck."
Looks like a thoughtful piece of hardware, not a smoke-alarm afterthought.
Priya S. · Austin, TX
✓ VERIFIED
★★★★★
"Used the room calculator."
Ended up with the 3-pack. Kitchen, hallway outside the bedrooms, one near the furnace. I sleep better.
Whitney L. · Madison, WI
✓ VERIFIED
Direct answers
The questions we keep getting.
How is this different from the smoke detector I already have?
+
Smoke alarms detect particulate from fire. CO and combustible gas are invisible and odorless. Keep your smoke alarm. Aegis is a separate, real-time monitor for CO, natural gas, and propane.
Does it detect natural gas AND propane?
+
Yes. The catalytic sensor reports combustible gas as a percentage of LEL (lower explosive limit) for both natural gas (methane) and propane.
What happens during a power outage?
+
Aegis is plug-in only — no internal battery. During an outage it does not protect. Keep your code-required battery-backed CO alarm active. Aegis adds live visibility while powered.
Is it UL certified?
+
Aegis Home Safe is ETL listed to UL2034 and UL1484. Keep your code-required CO alarms active; Aegis adds live visibility.
How many do I need for my home?
+
CPSC recommends a CO alarm on every level and outside sleeping areas. Use the Room Calculator above for a layout-specific recommendation. Most full-home owners land on the 3- or 6-pack.
What if it false-alarms?
+
The audible alarm activates at UL2034 thresholds — not at low PPM. Pre-alerts at lower readings are visual only. The hardware self-test confirms the sensor and speaker each time you press it.
What does 10 ppm vs 70 ppm actually mean?
+
10 ppm is information — your home is showing some CO from somewhere. 70 ppm is the UL2034 threshold where alarms are required to begin sounding within 60–240 minutes. Above 70 ppm, or any symptoms, is a leave-the-home situation.
Do I need to keep my existing CO alarm?
+
Yes. Building codes in most U.S. jurisdictions require battery-backed CO alarms in specific locations. Aegis is designed to add visibility, not to replace code-required alarms.
Where should I plug it in for best results?
+
CPSC guidance: on every level and outside sleeping areas. Avoid spots within 5 feet of cooking appliances or right next to bathrooms (humidity). The Room Calculator suggests outlets based on your layout.
Can I return it?
+
Yes. The 365-day test drive lets you return it for a full refund within a year if it does not earn its outlet. Shipping back is on us.
Heating season is here
Don't wait for the silent killer to show up.
Most U.S. CO incidents happen between November and February when furnaces run all night. The visibility you want is the visibility you wish you'd had.
If your CO alarm sounds or you experience headache, dizziness, nausea, or confusion - leave the home immediately and call 911. Aegis Home Safe does not replace emergency response.
Aegis Home Safe Monitor
4-Pack · Full Home Coverage