Model # 21006406

Internet #202281774

Store SKU #395443

Kidde Hardwired 120-Volt Inter-Connectable Carbon Monoxide Alarm with Battery Backup
0047871001200

Kidde

Hardwired 120-Volt Inter-Connectable Carbon Monoxide Alarm with Battery Backup

  • Hardwired 120-Volt
  • Carbon monoxide sensor
  • Interconnect with additional alarms
$3297 /each
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Product Overview

Kidde hardwired 120-Volt Inter connectable Carbon Monoxide Alarm with 9-Volt Backup can be interconnected with up to 24 Kidde devices, 18 of which can be initiation style (additional devices not included). The alarm has a fuel-cell design with a low-battery warning that issues a brief alarm chirp and a red LED light that will flash approximately every 15 seconds.

  • Can be inter connected with up to 24 Kidde devices, 18 of which can be initiation style (additional devices not included)
  • Compatible with smoke alarms, carbon monoxide alarms and heat alarms on 1 wiring network (alarms and wiring sold separately)
  • Smart inter connect system enables the unit to alarm in a carbon monoxide pattern and sound a different pattern when inter connected to a Kidde smoke alarm that is in alarm mode (smoke alarm sold separately)
  • Fuel-cell design with a low-battery warning that issues a brief alarm chirp and red LED light that will flash approximately every 15 seconds
  • Piezoelectric horn is rated at 85 dB at 10 ft.
  • Alarm will not sound if carbon monoxide levels are below 30 PPM
  • 9-Volt battery backup provides protection during power outages
  • Meets sensitivity requirements of UL 2034 single and multiple-station carbon monoxide alarms


  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Name Hardwired 120-Volt Inter-Connectable Carbon Monoxide Alarm with Battery Backup Plug-In Carbon Monoxide Alarm with Digital Display and 9-Volt Backup Hardwired Interconnectable 120-Volt Carbon Monoxide Alarm with Digital Display and Battery Backup Hardwired 120 Volt Inter-Connectable Carbon Monoxide Alarm with Sealed Lithium Ion Battery Back Up
Brand Kidde Kidde Kidde Kidde
Ratings (37) (115) (25) (13)
Power Source Hardwired Plug-In Hardwired Hardwired
Alarm/Detector Features Battery Back-Up,Interconnected Battery Back-Up,Digital display Battery Back-Up,Digital display,Interconnected Battery Back-Up,Digital display,Interconnected
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Customer Questions & Answers

I currently have a KN-COSM-IBA that is defective (Alarm keeps going off even though there is no s...

I currently have a KN-COSM-IBA that is defective (Alarm keeps going off even though there is no smoke or Co and new batteries in place). I have other units of the same model. Is this compatible with the other units that i have in the system?.
Asked by: tonyjay
vacuum it out if that dose not work then replace it if its 7 yr old replacer it any way
Answered by: dave
Date published: 2017-04-25

Can it be run on batteries only? It is not compatible with the hardwiring in my house. Can I just use batteries in it?

Asked by: Jordan
I am not sure how it could not be compatible with the wiring in your home. It works on A/C current. You only need to connect the hot and neutral wires. The red wire is for communicating with other units, but it is not necessary for it to operate. But if it is so I would recommend buying a plug-in model instead of using the on battery only as it will drain the battery quickly.
Answered by: MREABQ
Date published: 2017-04-07

Where do you put them? On the wall high or low?

Asked by: Tm
Low. Monoxide is heavier than air and settles down. 4 to 6 ft
Answered by: MasterElectrician
Date published: 2017-03-16

Can this unit replace a First Alert co5120bn by simply plunging into existing 3 wire plug?

Asked by: Chuck
some are the same but i always replace the plug
Answered by: dave
Date published: 2017-04-25
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Customer Reviews

Hardwired 120-Volt Inter-Connectable Carbon Monoxide Alarm with Battery Backup is rated 4.8 out of 5 by 36.
Rated 5 out of 5 by from I installed this unit in a government facility that required a hardwired carbon monoxide detector... I installed this unit in a government facility that required a hardwired carbon monoxide detector per their regulations. This fits the bill perfectly for them.
Date published: 2017-04-07
Rated 4 out of 5 by from 10 years passes quickly. I purchased this item to replace the one that started beeping at the 10... 10 years passes quickly. I purchased this item to replace the one that started beeping at the 10 year life expiration.
Date published: 2017-01-24
Rated 5 out of 5 by from Easy to install. Needed to update my detectors for a fire inspection prior to sale of my house. Easy to install. Needed to update my detectors for a fire inspection prior to sale of my house.
Date published: 2017-07-04
Rated 5 out of 5 by from I got these to swap out my 11 year old... I got these to swap out my 11 year old ones so I would not have to rewire. Work great!
Date published: 2017-05-02
Rated 5 out of 5 by from Replaced a unit that was installed 10 years ago. Same brand made replacing easy! Replaced a unit that was installed 10 years ago. Same brand made replacing easy!
Date published: 2017-01-31
Rated 5 out of 5 by from EZ install works great, great price, ordered O/L P/U in store great service. EZ install works great, great price, ordered O/L P/U in store great service.
Date published: 2017-05-02
Rated 5 out of 5 by from Great product! Great product!
Date published: 2017-02-21
Rated 5 out of 5 by from works well works well
Date published: 2017-04-25
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