SafeWise
Grevora
Renting With Kids? Your Landlord's Smoke Alarm Can't Detect the Gas That Kills 400+ Americans Every Year.
Why thousands of renting families are plugging in a small device before the heat comes on this winter.
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GAITHERSBURG, MD — On September 5, fire crews found dangerous carbon monoxide levels in one apartment building. Then in the building next door. More than 50 residents from three buildings were checked. 12 went to the hospital, including children. The source? A single oven.
If you rent, read that again. One oven. Three buildings. Shared walls.
Here's what nobody tells renting parents.
Let's be blunt.
That little white thing on your ceiling will scream if you burn toast.
It will stay dead silent while carbon monoxide fills your kid's bedroom.
It's not broken. That's exactly how it was built.
11:40 PM. Kids asleep. Heat on.
1:15 AM. Something in the building isn't burning right. Your furnace. Your neighbor's. The garage under your unit.
2:10 AM. Your son wakes up with a headache. Goes back to sleep. Nobody thinks twice.
No smell. No smoke. No sound.
And the scariest part isn't the gas. It's where it can come from when you rent. Reason #4 shows exactly how it can happen in your building too.
1.Your Smoke Alarm Is Deaf To The Gas That Kills In Your Sleep.
Smoke alarms detect smoke. CO doesn't make any. More than 400 Americans die from it every year, not counting fires. And the CDC's own warning is chilling: people who are asleep can die before they ever feel sick.
You won't smell it coming. Nobody can.
So what does catch it?
2.6 Protections. 1 Outlet. Zero Excuses.
It's called Grevora. A small plug-in detector that sits in a normal wall outlet and watches your air around the clock. No screws, no wiring, no app.
CO. Gas leaks. Smoke. Temperature. Humidity. And an 8-hour backup battery for when the power dies.
Here's a real test on a gas stove. Grevora goes under a glass bowl. The gas is turned on. No flame, just gas. The red ALARM light comes on.
One little box does the job of three gadgets you were never going to buy anyway.
3.Stop Lying Awake At 2 AM Wondering.
Your ceiling alarm gives you a tiny light and a prayer. This one shows you a live CO reading on the screen, plus gas and smoke status.
One glance before bed. Done. Lights off. Sleep. It stays awake so you don't have to.
4.Your Neighbor's Crappy Furnace Is Your Problem Now.
Shared walls. Shared vents. Shared garage. Shared air.
That's what makes Gaithersburg so unsettling. Officials traced it to one oven in one building. But dangerous CO levels turned up next door too. In a shared building, the source may not be in your unit at all. Air moves through gaps in walls, vents and shafts you'll never see, and up from the garage below.
You can't fix your neighbor's furnace. But you can find out early, before it becomes your family's problem.
5.If You Can Plug In A Phone Charger, You're Done.
No app. No Wi-Fi. No drill. No landlord permission. Your landlord never has to know it's there.
Grandma can plug it in within seconds. Moving out? Unplug it, toss it in a box, and your deposit stays yours.
6.Power's Out. Generator's Running. Is Anything Still Watching?
Storms kill the power. Then everyone fires up generators, gas heaters and camp stoves. That's exactly when CO spikes.
Plug-in detectors without a backup battery go dark with the lights. This one has an 8-hour backup battery and keeps watching in the dark.
7.Don't Wait On Your Landlord. Seriously.
About 36 states plus D.C. have CO alarm laws for homes, and many only kick in if there's gas or an attached garage. Texas? No statewide rule for homes. And in many states, once you move in, testing and batteries are your job, not theirs.
In deadly home fires where the smoke alarm failed, the battery was missing or disconnected 46% of the time (NFPA). Would you bet your kids' safety on it?
8.You Already Pay Rent. Don't Pay For The Damage Too.
Your landlord's insurance covers his building. Not your stuff. Not your liability.
If a fire or gas leak starts in your unit, the bill can land on you. Sometimes for your neighbors' units too. An early warning buys you time: get everyone out, then call 911 from outside. Earlier warning can mean less damage.
Quick tip: check that your renters insurance includes liability coverage.
9.Thousands Of Families Use Two. Here's Why.
Safety experts (NFPA) recommend a CO alarm outside every sleeping area and on every level. For most apartments, that means two:
- 🍳 Kitchen: near the stove (follow the distance guide in the box)
- 🧸 Outside the kids' room: so its loud 85dB alarm is right outside their door
Keep your ceiling smoke alarms. This adds the part they're deaf to: CO and gas. Think of it as the cheapest life insurance you'll ever buy.
10.90 Nights To Try It. 2 Years Covered.
Plug it in. Live with it. Sleep with it. If it doesn't give you real peace of mind, send it back within 90 nights and get every penny back. And if anything goes wrong in the next 2 years, we cover it.
The only thing you risk is waiting.
How Does Grevora Compare To Other Detectors?
Yes, I Want Grevora Now! »
Is it difficult to install Grevora? Do I need an electrician?
Not at all. Plug it into a standard US wall outlet, give it a short warm-up, and it's on watch. No hardwiring, no drilling, no tools.
What happens if the power goes out?
Grevora has a built-in backup battery that keeps it monitoring and alerting for up to 8 hours during a power outage.
Where is the best place to use Grevora?
Outside sleeping areas and on every level. Follow the placement guide in the box, including how far to keep it from stoves and water heaters. Many renters start with two: one for the kitchen area, one outside the kids' room.
Does Grevora replace my smoke alarms?
No. Keep the smoke and CO alarms required in your home. Grevora adds what your ceiling alarm can't do: gas detection and a live CO reading on the screen.
Do I need Wi-Fi or a smartphone app?
No Wi-Fi, no Bluetooth, no app. Everything shows on the built-in display, and the 85dB siren alerts you directly. Nothing to connect, nothing to update.
Can I buy Grevora in stores?
Not yet. Grevora is sold exclusively through our website.
What Are Others Saying?
Finally — Know What's In The Air While They Sleep. The Plug-In CO & Gas Detector Built For Renters [90 Nights Risk-Free]
Check Availability »90-night money-back guarantee · 2-year warranty
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Check Availability »You can't smell it. You can't see it. And when you rent, you can't always control where it comes from.
But tonight, you can plug in something that stays awake while your family sleeps.
A small thing on the wall. It could be the thing that wakes you up.
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