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Kidde Hardwired Combination Carbon Monoxide & Smoke Alarm, Model KN-COSM-IBA
Key item features
- Fire Detection: The red LED flashes and the alarm emits three long beeps followed by a verbal warning "FIRE!" until smoke is eliminated.
- CO Detection: Emits four short beeps followed by a verbal warning "WARNING! CARBON MONOXIDE!" until the unit is reset or CO is eliminated.
- Low Battery Alert: One chirp followed by a "LOW BATTERY" warning and a flashing red LED, repeating every minute for seven days.
- Voice Hush Indication: Announces "HUSH MODE ACTIVATED" and "HUSH MODE CANCELLED" when the hush feature is used.
- Previous CO Detection: Announces "CARBON MONOXIDE PREVIOUSLY DETECTED" if CO levels of 100ppm or higher were detected when the Test/Reset button is pressed.
- Advanced Sensor Technology: Combines ionization smoke sensor and electrochemical CO sensor for fast response to real fires and CO detection, reducing nuisance alarms.
- Intelligent Communication: Sensors communicate to adjust smoke sensitivity, distinguishing between real hazards and false alarms.
Specs
- Smoke & carbon monoxide alarm sensor technologyElectrochemical Sensor
- Battery life10 Years
- Power typeBattery
- Smart techN
- Rec locationIndoor
- Decibel rating90
Reviews summary
- : Offers affordable options with reasonable prices.
- : Can be easy to follow, but may require online research or clarification.
- : Lasts shorter than expected, requiring frequent replacements.
- : Occurs even after replacing batteries.
- : Fails to stop beeping despite battery replacement or troubleshooting.
- : Prone to false alarms without apparent cause.
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About this item
Product details
• Fire: The red LED will flash and be accompanied by three long alarm beeps followed by a verbal warning message “FIRE!”. The alarm pattern will repeat until smoke is eliminated.
• Carbon Monoxide: Four short alarm beeps followed by a verbal warning “WARNING! CARBON MONOXIDE!” This continues until the unit is reset or the CO is eliminated.
• Low Battery: One chirp followed by warning “LOW BATTERY.” The red LED light will flash. This pattern will continue every minute for at least seven days. Under battery power, the “LOW BATTERY” voice only occurs once every 15 minutes. Voice Hush Indication: “HUSH MODE ACTIVATED” and “HUSH MODE CANCELLED” voice announcement.
• If the alarm had detected a CO level of 100ppm or higher when the Test/Reset button is pressed, the unit will announce “CARBON MONOXIDE PREVIOUSLY DETECTED” to warn of the CO incident.
Specifications
Smoke & carbon monoxide alarm sensor technology
Battery life
Features
Power type
Warranty
Warranty information
Warranty url
Warnings
Ingestion Hazard
Warning Text
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Customer ratings & reviews
Reviews summary
- : Offers affordable options with reasonable prices.
- : Can be easy to follow, but may require online research or clarification.
- : Lasts shorter than expected, requiring frequent replacements.
- : Occurs even after replacing batteries.
- : Fails to stop beeping despite battery replacement or troubleshooting.
- : Prone to false alarms without apparent cause.
Customer images






+38 images
Showing 1-3 of 412 reviews
CHIRP CHIRP CHIRP
I have a KN-COSM-IBA which my builder installed a few years back. Started chirping in middle of the night so I took off and replaced batteries, went through all the procedures to get it working again, and it started chirping an hour later. Next morning, pulled it off, took batteries out, hit the test button to drain all power, let it sit for 10 minutes and reinstalled with new batteries. No chirping for 8 hours and then it started chirping again. I have owned many homes and never had this issue with any other brands. Going to pull all these down and try to find a better brand
Poor Product Replacement Guidance
No replacement available in stores. The Kidde website has "where to buy" link to purchase the product that are either bad links or the product is unavailable. And, there is no guidance on a compatible product. New products appear to have a different connector, meaning rewiring is involved. HUGE hassle.
Thank you for taking the time to share your experience with us. We’d like the opportunity to discuss your concerns in more detail. Please call us at 1-800-880-6788 or email us at Kidde.Product.Support@carrier.com so we can assist you and conduct a thorough investigation.
chirp chirp chirp
same example as the the other one stars. got the chirp and replaced batteries. still chirping. looked up lots of different reasons this would happen and tried everything. finally looked up the model number and i'm glad i found what i did. thank you to everyone for letting me know i'm not alone.
Thank you for sharing your feedback. If you need further assistance, please feel free to call us at 1-800-880-6788 or email Kidde.Social.Care@carrier.com, and we'll gladly help however we can.
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