Protect Your Family From the Silent Killer

Haven is an easy-to-use CO & gas detector that shows you real-time danger levels - so you can protect your family before it's too late.

See Danger at 0 PPM — Not 70 PPM like cheap detectors that wait until it's too late

Plug & Protect — No ladder, no tools, no electrician. 30 seconds to install.

Works for Whole Family — Protects kids, parents, grandparents — everyone under your roof

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NOT AVAILABLE ON AMAZON OR EBAY

"I was scrolling at 2 AM while nursing when I saw a video about a family who lost their toddler to CO poisoning. I threw up from anxiety. The next day I found Haven. The first night I installed it, I slept through until morning for the first time since my son was born. I look at that '0' every single day and exhale. I finally feel like the mom I'm supposed to be."

— Sarah M. 34 Texas

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Lifetime Guarantee

2025 Home Security Award Winner

90 Day Money Back Guarantee

Don't Become Another Headline.

Carbon monoxide is the #1 cause of accidental poisoning deaths in America.

Every year, over 400 Americans die from CO poisoning most of them while sleeping. The tragedy? Almost every victim had a "working" detector on their wall. Green light glowing. Silent.

CO comes from furnaces, water heaters, garages, stoves. You can't smell it. You can't see it.

You just don't wake up !

Every Breath Counts.
Cheap detectors wait. Haven doesn't.

Introducing: The Haven CO & Gas Detector

Necknix is a professional-grade detector specifically designed to show you real-time CO, natural gas, and propane levels starting at 0 PPM.

 

It's an easy-to-use, accurate device that anyone can install in 30 seconds no ladder, no tools, no electrician.

 

Keeping a Haven in your home is one of the most important decisions you can make for yourself and your family.

 

Because the silent killer doesn't give warnings. Haven does.

Designed By Firefighters. Built To Save Lives.

Necknix was developed with first responders who saw the same tragedy repeat itself — families with "working" detectors who never got the warning they deserved.

 

✓ UL 2034 Certified — Strictest CO detector standards in North America
 

✓ Professional-Grade Sensors — Same technology used by fire departments

✓ ETL Listed — Independently tested for safety and accuracy

 

Haven isn't just another detector. It's the detector firefighters wish every home had.

 

Like having a fire station in your hallway — watching the air so you don't have to.

Meet the American Familys who protect 
themselfes with Steadfast Haven

Over 500.000+ Homes upgraded already

Bobby M.

"I Saw 47 PPM. My Old Detector? Silent."
"We had a 'working' detector for 6 years. Green light. Beeped when I tested it. Then I got Haven just to double-check. First night: 47 PPM in my son's bedroom. My old detector? Still glowing green. Still silent. I unplugged it and threw it in the trash. Haven probably saved my son's life."

Jan M. 

“Grandmas House is Safe Again!”

"When my daughter drops the grandbabies off for the weekend, I can honestly say to myself, 'They are completely safe here.' I am the matriarch — it's my job to provide a safe haven. Haven gave me back that peace of mind. Grandma's house is officially the safest place on earth again."

Karolina T.

"I Sent One to My Parents"

"I bought one for our house and sent two to my parents. Mom is 74 and lives alone. Her old detector was 12 years old — the sensor was dead but the green light was still on. Now I don't lie awake at 2 AM wondering if she's okay. Best decision I ever made."

What Makes Necknix So Different

Other Brand

Show real-time CO level

Alerts you early

Detects natural gas + propane

Easy install

No false alarms

Test button tells the truth

Guarantee

30-day money-back guarantee included 

"Right Now, While You Read This"

Right now, a family is breathing poison. Detector glowing green. Kids asleep. No idea.

Some will wake up with headaches. Some won't wake up at all.

This isn't a someday problem. It's a tonight problem.

Do you know your detector works or are you just hoping?

Hope isn't protection. Haven is.

"I built Haven after my daughter's close call. No family should trust a green light that lies." - JAMES CHEN, FOUNDER

Protect Your Family. Get Your Haven Today!

CHooSE FOR YOUR HOME:

FOR ONE ROOM ONLY

1-PACK

Rated 4.8/5 by our customers

Necknix Haven CO & Gas Detector

Basic Offer

Total:

$100.00

you save: $30

60-day money-back guarantee

Free delivery

APARTMENTS, CONDOS

2-PACK

Rated 4.8/5 by our customers

Necknix Haven CO & Gas Detector

Best Value

Total:

$191.00

you save: $50

60-day money-back guarantee

Free delivery

FULL HOME COVERAGE 

4-PACK

Rated 4.8/5 by our customers

Necknix Haven CO & Gas Detector

Best Value

Total:

$303.00

you save: $90

60-day money-back guarantee

Free delivery

FREE BONUS: 1 Set Emergency Fire Blanket

YOUR HOME + PARENTS' HOME

8-PACK

Rated 4.8/5 by our customers

Necknix Haven CO & Gas Detector

Best Value

Total:

$529.00

you save: $230

60-day money-back guarantee

Free delivery

FREE BONUS: 2 Sets Emergency Fire Blanket

Our trusted payment processors:

We use a 256-bit secure shopping cart where 100% of your data is encrypted, safe and secure. This is the same data security standard used by most banks, governments and military organizations.

Your Purchase Is Protected By Our
90-Day "Sleep In Peace" Guarantee

Here at Necknix, we make sure our customers feel safer — or we refund 100% of 
their investment. We're so confident you'll finally sleep knowing your family is 
protected that we'll bear all the risk.

90 Day Money
Back Guarantee

Some families feel the relief the first night. Some take a week to stop checking the old detector out of habit. Everyone's different. So the best thing you can do is give it a try — and if you don't feel safer, calmer, and finally certain your family is protected, you have 90 days to claim a refund and get your money back.

Real, Verified Results:
See Why Families Are Replacing Their 
Detectors and Calling Haven "Life Saving"

Note: All reviews below are from actual paying customers.They have been authenticated and verified

Colonel Robert M.

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"I Bought 5 — One for Each Family Member"

"I kept one for myself and gave one to each of my adult children for their homes. I can't think of a better gift to give my family — a gift that says 'I love you and I want you safe' without saying 'I'm worried about you.' I hope they never need it, but if they do, Haven will be there."

Amanda K., 59

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"My Husband Doesn't Argue About Safety Anymore"

""My husband said our old detectors were 'fine.' Then I showed him that 40% of detectors fail to alarm at dangerous levels. We ordered Haven that night. He doesn't argue about safety anymore."

Michaela T., 74

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"I'm 74 and I Did It Myself"

"I'm going to be 80 years old and I've often thought, 'what would I do if something happened because I live alone?' Now I look at that little screen, see '0,' and I know. I'm not alone. Haven is watching."

Thomas D.

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"It Caught What Our $200 Nest Missed"

"We had a Nest Protect in every room. Top of the line, right? I bought Haven just to compare. First week: Haven showed 29 PPM. The Nest? Silent. Green light. We had a cracked flue pipe. Four kids in this house. I don't even want to think about what could have happened."

Jon T.

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"I Bought 5 — One for Each Family Member"

"I kept one for myself and gave one to each of my adult children for their homes. I can't think of a better gift to give my family — a gift that says 'I love you and I want you safe' without saying 'I'm worried about you.' I hope they never need it, but if they do, Haven will be there."

SECURE YOUR HOME NOW!

Real, Verified Results:
See Why Families Are Replacing Their 
Detectors and Calling Haven "Life Saving"

Note: All reviews below are from actual paying customers.They have been authenticated and verified

Colonel Robert M.

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"I Bought 5 — One for Each Family Member"

"I kept one for myself and gave one to each of my adult children for their homes. I can't think of a better gift to give my family — a gift that says 'I love you and I want you safe' without saying 'I'm worried about you.' I hope they never need it, but if they do, Haven will be there."

Amanda K., 59

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"My Husband Doesn't Argue About Safety Anymore"

""My husband said our old detectors were 'fine.' Then I showed him that 40% of detectors fail to alarm at dangerous levels. We ordered Haven that night. He doesn't argue about safety anymore."

Michaela T., 74

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"I'm 74 and I Did It Myself"

"I'm going to be 80 years old and I've often thought, 'what would I do if something happened because I live alone?' Now I look at that little screen, see '0,' and I know. I'm not alone. Haven is watching."

Thomas D.

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"It Caught What Our $200 Nest Missed"

"We had a Nest Protect in every room. Top of the line, right? I bought Haven just to compare. First week: Haven showed 29 PPM. The Nest? Silent. Green light. We had a cracked flue pipe. Four kids in this house. I don't even want to think about what could have happened."

Jon T.

Verified Customer

Reviewing

Necknix Haven4-1 Detector

I recommend this product

1 days ago

"I Bought 5 — One for Each Family Member"

"I kept one for myself and gave one to each of my adult children for their homes. I can't think of a better gift to give my family — a gift that says 'I love you and I want you safe' without saying 'I'm worried about you.' I hope they never need it, but if they do, Haven will be there."

SECURE YOUR HOME NOW!

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Frequently Asked Questions

How is Necknix different from my current detector?

Most detectors only show a green light — which stays on even when the sensor is dead. They don't alarm until 70 PPM, which is AFTER 1-4 hours of exposure. Haven shows you real-time levels from 0 PPM on a digital display. You see the truth, not a light that lies.

Will it false alarm when I cook?

No. Haven uses professional-grade electrochemical sensors — the same type used in industrial settings. They detect real threats, not toast or shower steam.

Does Necknix detect propane and natural gas, or just carbon monoxide?

Necknix is a 4-in-1 detector. It monitors carbon monoxide, natural gas, AND propane, plus temperature and humidity. This is a critical distinction. Most cheap detectors from the hardware store only detect CO. If your stove leaks natural gas, your furnace has a propane leak, or your water heater line is compromised, those detectors stay completely silent. Necknix catches all three gas threats in real-time, with PPM readings on the display starting at 0. One unit. Complete protection. No gaps.

Where should I install Necknix? Does height or outlet position matter?

Necknix plugs into any standard wall outlet, no ladder, no tools, no electrician. 30 seconds and you're protected. For placement, focus on two priorities: near gas appliances (furnaces, stoves, water heaters) and in hallways outside bedrooms where your family sleeps. Necknix's sensors are calibrated to detect all three regardless of outlet height. Most families start with one near the furnace/water heater, one in the kitchen near the stove, and one in the hallway outside bedrooms. The 4-Pack covers most homes completely.

Is it hard to install?

No. Plug it into any eye-level outlet. That's it. Takes 30 seconds. No ladder, no tools, no electrician.

Can I use it if I live alone?

Yes! Necknix is perfect for people who live alone. It watches 24/7 and will alert you to danger even while you're sleeping. Many of our customers are seniors who live independently and wanted peace of mind.

My detector is hardwired. Isn't that better?

Hardwired means it runs on electricity — but the SENSOR inside still expires after 5-7 years. The green light stays on even when the sensor is dead. Haven plugs in and shows you a real number, so you always know it's working.

How fast will I receive it?

Ships from US warehouse. 3-5 business days typically.

What if it doesn't work?

90 days. Full refund. Keep everything. Zero risk.

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