Kidde Hardwired Combination Carbon Monoxide & Smoke Alarm, Model KN-COSM-IBA

Sorry, this item is out of stock

Browse similar items
Kidde Hardwired Combination Carbon Monoxide & Smoke Alarm, Model KN-COSM-IBA
Kidde Hardwired Combination Carbon Monoxide & Smoke Alarm, Model KN-COSM-IBA
Hero image 0 of Kidde Hardwired Combination Carbon Monoxide & Smoke Alarm, Model KN-COSM-IBA, 0 of 15

Kidde Hardwired Combination Carbon Monoxide & Smoke Alarm, Model KN-COSM-IBA

3.1 stars out of 505 reviews
(3.1)|
505 ratings

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.
Generated by AI
Current price is $41.90
Price when purchased online
Out of stock

How do you want your item?

How do you want your item?
Out of stock

About this item

Product details

Specifications

Warranty

Warnings

Customer ratings & reviews

3.1 out of 5 stars
stars505 ratings412 reviews
How item rating is calculated

Reviews summary

Pros
  • : Offers affordable options with reasonable prices.
Cons
  • : Lasts shorter than expected, requiring frequent replacements.
  • : Occurs even after replacing batteries.
  • : Prone to false alarms without apparent cause.
Generated by AI

Customer images

  • +38 images
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 412 reviews

Jan 22, 2025
HFC419
2 out of 5 stars review

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

Review from Kidde
Helpful?7AMLV8SY88YU42199974
Jul 5, 2025
HTX Customer
1 out of 5 stars review

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.

Review from Kidde
Helpful?7AMLV8SY88YU42199974
reply from Kidde Team

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.

Feb 21, 2025
JacobJ
1 out of 5 stars review

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.

Review from Kidde
Helpful?7AMLV8SY88YU42199974
reply from Kidde Team

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.