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Kidde KN-COB-IC Hardwired Interconnectable Carbon Monoxide Alarm
$52.98
Final price set by Amazon · may vary
EDITORIAL REVIEW: 4.5/5 — WC Safety Review of the kidde kn-cob-ic, a residential carbon monoxide alarm. Editorial assessment by Steven Eaton, WC Safety editor, based on published Kidde specifications and category fi...
Key Features
- AC hardwired installation — no outlet required
- Permanent installation for new construction and retrofit
- Battery backup maintains protection during power outages
- 85 dB alarm with visual alert
- Test/reset button
- UL 2034 listed
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Built for Industrial BuyersResearch written for safety managers, procurement teams, and field supervisors.
EDITORIAL REVIEW: 4.5/5 — WC Safety Review of the kidde kn-cob-ic, a residential carbon monoxide alarm.
Editorial assessment by Steven Eaton, WC Safety editor, based on published Kidde specifications and category fit. We did not laboratory-test this product.
Editorial assessment by Steven Eaton, WC Safety editor, based on published Kidde specifications and category fit. We did not laboratory-test this product.
The Kidde KN-COB-IC is a hardwired, interconnectable carbon monoxide alarm - wire several together and when one senses CO, they all sound.
CHECK PRICE ON AMAZON → SHOP CARBON MONOXIDE ALARMS →
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Why the kidde kn-cob-ic guards against carbon monoxide
In a larger home, a CO alarm sounding in the basement should wake the bedrooms. Interconnected hardwired alarms do exactly that, and the Kidde KN-COB-IC is built for that whole-home wiring. As carbon monoxide alarms go, this is the hardwired interconnect pick, and the best CO detector guide and the CO placement guide put it in context. It makes one CO detection sound the whole house.
Safety first: a carbon monoxide alarm is a life-safety device — if it sounds, get everyone to fresh air outside and call 911 or the fire department, then have the source found and fixed by a professional. This is a residential early-warning alarm; it is not built for occupational settings where CO can climb to IDLH concentrations that demand industrial gas-detection instruments and rescue procedures, so use the right tool for each environment. Keep fresh batteries in it, place it per the manufacturer manual and local codes, and replace the unit at its end-of-life date.
What the kidde kn-cob-ic listing documents
From the listing: hardwired power; interconnect capability for whole-home alerting; and residential carbon monoxide detection. These are true carbon monoxide alarm and CO alarm credentials as a residential CO alarm. Confirm the power source, UL 2034 listing, and end-of-life date on the listing. As with any life-safety device, the alarm or extinguisher is one layer of home protection — combine detection, suppression, an escape plan, and regular testing rather than relying on a single device. Buy from a listing that states the specifications and safety listings plainly, keep the paperwork, and note the manufacture and end-of-life dates when it arrives so replacement never slips, because a device past its service life can fail silently exactly when it is needed most.
How the kidde kn-cob-ic compares
Weigh it against the Kidde COB, the Kidde COP plug-in, the Kidde KN-COB-LP2, the Kidde KN-COEG-3, the Kidde 30CUAR combo. The CO exposure symptoms guide and the garage CO guide help you choose.
Choosing the right home life-safety device
Match the device to the hazard and the room: smoke alarms for fire, CO alarms for combustion appliances and attached garages, combination units where you want both, and a rated extinguisher within reach of the kitchen and shop. Browse the carbon monoxide alarms, CO detectors, Kidde CO alarms, smart CO alarms, smoke & CO alarms collections; and read the home fire safety guide to plan whole-home coverage.
Where it fits by home and orders
The Kidde KN-COB-IC suits new builds and remodels wiring a hardwired, interconnected life-safety system - compare it with the X-Sense SC07, browse the wider CO detectors and Kidde CO alarms ranges, and confirm interconnect compatibility with your other alarms before mixing brands. Whole-home coverage is the goal: an early-warning device in each key room, a rated extinguisher within reach of the highest-risk spots, and a practiced escape plan tie the pieces together, so read the home fire safety guide to map what each level of your home still needs. For multi-unit or property orders, quantity purchasing runs through a free Amazon Business account — volume pricing, PO numbers at checkout, and tax-exempt eligibility for qualifying organizations, with the walkthrough linked in our footer.
Frequently asked questions
What is the kidde kn-cob-ic?
A hardwired interconnectable carbon monoxide alarm. It warns of carbon monoxide, a colorless, odorless gas from combustion appliances, engines, and blocked flues, so occupants can get to fresh air before exposure becomes dangerous.
How is it powered?
Confirm the power source on the listing - battery, plug-in with battery backup, or hardwired. Battery-backup and sealed-battery models keep working through a power outage, which is when some CO risks rise.
Where should I place it?
Follow the manufacturer manual and local codes: generally on every level and near sleeping areas, away from dead-air spots. See our CO placement guide for room-by-room guidance.
What do I do if it sounds?
Treat every alarm as real: get everyone to fresh air outside and call 911 or the fire department, then have the CO source found and fixed by a professional before returning.
Is it the same as an industrial CO monitor?
No. This is a residential early-warning alarm. Occupational settings where CO can reach IDLH levels need industrial gas-detection instruments and rescue procedures. Use the right tool for each environment.
Does it detect smoke or other gases?
A CO-only alarm detects carbon monoxide only unless the listing states otherwise. For smoke too, choose a combination smoke/CO alarm. Confirm what this model detects on the listing.
How long does it last?
CO sensors have a service life, typically several years, after which the unit must be replaced, not just re-batteried. Confirm the end-of-life date and replace the alarm on schedule.
How often do I test it?
Test with the button monthly and follow the manufacturer's maintenance schedule. A CO alarm you never test is a CO alarm you cannot trust.
Can it be interconnected?
Some models interconnect so one alarm triggers all. Confirm interconnect capability and compatibility on the listing if you want whole-home alerting.
Is it UL listed?
Confirm the current UL 2034 listing on the product page. A CO alarm should carry the applicable safety listing for residential use.
Does a CO alarm replace appliance maintenance?
No - it is a last-line warning. Have fuel-burning appliances, flues, and vents inspected on schedule so CO is prevented at the source, not just detected.
How do I order several?
Quantity purchasing runs through a free Amazon Business account - volume pricing, PO numbers at checkout, and tax-exempt eligibility for qualifying organizations. The bulk-ordering walkthrough is linked in our footer.
Brand / Vendor
Kidde
Model / SKU
KN-COB-IC
Product Type
Carbon Monoxide Alarm
Condition
New
Price
$52.98 (Amazon)
Rating
4.7 / 5 — 1386 Amazon ratings
Availability
Check current availability on Amazon
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Industrial Grade Only
Coverage focuses on equipment built for professional use in manufacturing, construction, and industrial environments.
Independent Product Research
Product information is compiled from manufacturer specifications, published standards information, compatibility data, and other cited sources.
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WC Safety may earn commissions from qualifying purchases made through affiliate links. Affiliate relationships never change the specifications presented.
Verified Buyer Reviews
Customer Reviews
★★★★★4.7 / 5· 1,386 ratings on Amazon
★★★★★
Your family life’s depend on a dependable product.
Reliable and reasonably priced!Mounting is easy.
Verified Purchaser · April 14, · ✓ Amazon Verified Purchase
★★★★★
Perfect replacements for my old detectors
Something started beeping in the house and it was making everyone crazy. It wasn't a loud "there's a problem" beep but a quiet, subtle beep. After looking everywhere I finally checked the CO detectors and realized they had expired. Of course they all expired at the same time (since they were all installed at the same time). Got these to replace them and they are working great. They tied in to the other smoke detectors the way they are supposed to and are exactly what I need.
Verified Purchaser · September · ✓ Amazon Verified Purchase
★★★★★
Good quality, top brand
Great quality, easy to install (but does involve wires if you don't have same clip in. Battery provided. Top class detector. Had two replaced as others (same brand prior model) expired. Reasonable price. Definitely would hear if it went off, test sound crisp and clear.
Verified Purchaser · December 3 · ✓ Amazon Verified Purchase
★★★★★
Accurate product description
Good price, fast shipping, and although the box was a bit roughed up the item was in perfect condition and worked after I installed it.
Verified Purchaser · April 12, · ✓ Amazon Verified Purchase
★★★★☆
They work. Wish they were cheaper. End of Life beep is EXTREMELY ANNOYING!
I pick these same detectors every 10 years (that's their lifespan), and they seem to be reliable.What I hate is that when they reach end of life (EOL) they beep EVERY 15 SECONDS, VERY LOUDLY.I was out of town when mine reached EOL, so for 2 weeks they beeped, and loudly enough that anyone who walked up to my house could hear them; A dead giveaway that no one was home.
Verified Purchaser · December 4 · ✓ Amazon Verified Purchase
★★★★★
Easy replacement for out of date Carbon Monoxide detector.
The CO detector arrived and was easily installed. It has a triple prong (ground) electrical feed, so if you aren't replacing a previous detector, you may have the use the supplied electrical wiring kit.
Verified Purchaser · May 26, 20 · ✓ Amazon Verified Purchase
★★★★★
Perfect For Me
This unit turned out to be a direct, exact replacement for the one installed that had reached end-of-life and was driving me nuts by chirping every few days (usually starting in the wee hours) until I went down to the basement and hit the reset button. I thought I'd need an electrician (I don't mess with the house wiring) but it's such a direct replacement that no rewiring was necessary, just release the quick-connect plug from the old unit , plug it onto the new unit and lock the new unit onto the existing backplate -- DONE. I sure wish everything with home maintenance could be that easy.
Verified Purchaser · September · ✓ Amazon Verified Purchase
★★★★★
Good CO detector for hardwired with battery backup
Replaced same model that was almost 10 years old. Used same bracket and wire connection, so it was very easy.
Verified Purchaser · January 4, · ✓ Amazon Verified Purchase
★★★★★
Perfect Match
It was exactly what we needed to replace. It had the exact same wiring and dimensions as our previous Kidde Hardwired Carbin Monoxide Detector that was 10-11 years old. Perfect match and love how quickly it arrives. Less than 24 hours
Verified Purchaser · March 25, · ✓ Amazon Verified Purchase
★★★★★
Exact Fit!
Fit my existing bracket and plug wire perfectly! Plugged it in, twisted it on the bracket…Done!!!
Verified Purchaser · March 29, · ✓ Amazon Verified Purchase
Showing 10 of 1,386 Amazon reviews.
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Frequently Asked Questions
What is the kidde kn-cob-ic?
A hardwired interconnectable carbon monoxide alarm. It warns of carbon monoxide, a colorless, odorless gas from combustion appliances, engines, and blocked flues, so occupants can get to fresh air before exposure becomes dangerous.
How is it powered?
Confirm the power source on the listing - battery, plug-in with battery backup, or hardwired. Battery-backup and sealed-battery models keep working through a power outage, which is when some CO risks rise.
Where should I place it?
Follow the manufacturer manual and local codes: generally on every level and near sleeping areas, away from dead-air spots. See our CO placement guide for room-by-room guidance.
What do I do if it sounds?
Treat every alarm as real: get everyone to fresh air outside and call 911 or the fire department, then have the CO source found and fixed by a professional before returning.
Is it the same as an industrial CO monitor?
No. This is a residential early-warning alarm. Occupational settings where CO can reach IDLH levels need industrial gas-detection instruments and rescue procedures. Use the right tool for each environment.
Does it detect smoke or other gases?
A CO-only alarm detects carbon monoxide only unless the listing states otherwise. For smoke too, choose a combination smoke/CO alarm. Confirm what this model detects on the listing.
How long does it last?
CO sensors have a service life, typically several years, after which the unit must be replaced, not just re-batteried. Confirm the end-of-life date and replace the alarm on schedule.
How often do I test it?
Test with the button monthly and follow the manufacturer's maintenance schedule. A CO alarm you never test is a CO alarm you cannot trust.
Can it be interconnected?
Some models interconnect so one alarm triggers all. Confirm interconnect capability and compatibility on the listing if you want whole-home alerting.
Is it UL listed?
Confirm the current UL 2034 listing on the product page. A CO alarm should carry the applicable safety listing for residential use.
Does a CO alarm replace appliance maintenance?
No - it is a last-line warning. Have fuel-burning appliances, flues, and vents inspected on schedule so CO is prevented at the source, not just detected.
How do I order several?
Quantity purchasing runs through a free Amazon Business account - volume pricing, PO numbers at checkout, and tax-exempt eligibility for qualifying organizations. The bulk-ordering walkthrough is linked in our footer.