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Model # 21027519

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Code One Smoke & Carbon Monoxide Detector, Hardwired with AA Battery Backup & Voice Alarm

$44.97
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  • 2-in-1 protection: combination smoke & CO alarm in 1 unit
  • Voice alarm alerts to fire, carbon monoxide, or low battery
  • Hardwired installation with 2-AA alkaline battery backup
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Product Details

Protect your family with the Kidde Code One Combination Smoke & Carbon Monoxide Detector. The hardwired, ionization Kidde Code One Combination Smoke & Carbon Monoxide Detector operates on a 120-Volt AC power source with 2-AA alkaline batteries as a backup. Using ionization sensor technology, the Kidde Code One Smoke Detector alerts to invisible fire particles, while the Kidde Carbon Monoxide Detector alerts of poisonous carbon monoxide gas, even during power outages. The Kidde Code One Combination Smoke & Carbon Monoxide Detector has voice alert that warns of fire, carbon monoxide, or low battery. The green LED will also flash every 2 seconds while in Hush Mode and will automatically reset itself. A constant green LED light indicates that AC power is connected. The Kidde Code One Smoke & Carbon Monoxide Detector can be interconnected in a multiple station arrangement (limit of 18 initiation devices, of which 12 can be smoke alarms) or used as a single station alarm. It is possible to interconnect 6 strobe lights and/or relay modules. UL Certified with a 10-year limited warranty. Meets requirements of UL 2034, UL217, NFPA72, The State of California Fire Marshall, NFPA 101, FHA, & HUD.
  • Shop all Kidde fire safety products here
  • Protection during power outages and no low battery chirps
  • Hardwired 120-volt power source with 2-AA alkaline batteries as backup
  • Combination alarm provides alerts to smoke and carbon monoxide
  • Voice warning alerts of "Fire!" when a smoke or fire hazard is present, "Warning! Carbon monoxide!" when gas is detected, or "Low battery
  • Ionization sensor - detects invisible fire particles (associated with fast flaming fires) sooner than photoelectric sensing alarms
  • Smart hush-silences the unit during nuisance alarm situations
  • A green blinking LED light indicates when alarm is in hush mode or powered by battery only
  • Electrochemical sensor technology - detects poisonous carbon monoxide gas
  • Replacement Chirp - alerts to replace alarm after 10 years of operation
  • Constant green LED light indicates that AC power is connected
  • Industry experts (such as the NFPA), recommend that both ionization and photoelectric smoke alarms be installed to help ensure maximum detection of the various types of fires that can occur within the home.
  • Ensure whole home family protection by placing 1 fire detector and carbon monoxide detector on each level of your home, in your bedroom, & other locations where required by law
  • Compatible with Kidde, FireX, Code One, and Sentinel products
  • Kidde offers a full range of 120V AC wire-in life safety products with interconnect capability to provide the most immediate and complete system available. When any one interconnected alarm is triggered, all interconnected alarms within the home sound an immediate warning.
  • Smoke and carbon monoxide detector utilizes an ionization sensor to detect fire hazards and sounds an 85 db alarm when a hazard is detected
  • Shop all Kidde Smoke and Carbon Monoxide Detectors
  • Properly prepare your home for a fire or carbon monoxide emergency
  • Protect your home and family from fire damage using these preventative tips
  • Click here for more information on Electronic Recycling Programs
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Additional Resources

From the Manufacturer

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Specifications

Dimensions: H 5.75 in, W 5.75 in, D 1.7 in

Dimensions

Product Depth (in.)1.7 inProduct Height (in.)5.75 in
Product Width (in.)5.75 in

Details

Alarm Sensor TypeIonizationAlarm TypeCarbon Monoxide, Smoke
Alarm/Detector FeaturesBattery Back-Up, Hush Feature, Interconnected, Voice AlertBattery Type RequiredAA
Commercial/ResidentialResidentialConnector/Contact TypeNone
Fixed or portableFixedIncludedBatteries
Pack Size1Power SourceHardwired
Returnable90-DayVoltage (V)120

Warranty / Certifications

Certifications and ListingsUL Listed
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Questions & Answers

177Questions
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Q:How does one dispose a unit that has been replaced?
by|Nov 25, 2023
1 Answer
Answer This Question

A:  Identify what type of smoke detector you have —some alarms contain radioactive material, which by law must have a warning label somewhere on the device. Typically, ionization smoke detectors rely on a radioactive material called Americium-241, which is considered safe for human exposure when used properly in detectors, unless it is tampered with. Detectors containing Americium-241 should not be thrown in the trash since breakage or incineration may cause environmental harm and can set off radiation detection alarms. Once you’ve identified your alarm type, you can determine whether it can be disposed of in household garbage. If it can, remove your smoke detector from its placement and remove any batteries. The batteries should be disposed of separately if you’re throwing your smoke alarm in the residential trash. Verify with your local municipality regarding disposal ordinances before disposing of an alarm. We do have a program to take back a limited number of ionization smoke alarms from residential customers only under certain conditions. Call us at 1-800-880-6788 for more information about that. After you dispose of the old alarm, install a new smoke detector to replace the old. Having a functional alarm is important to help protect a household during the event of a fire. Note that fire alarms should not be recycled.

by|Nov 30, 2023
    1 found this answer helpful
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    Q:Does this use the same connector as the KN-COPE-I? It looks different to me in the picture.
    by|Nov 18, 2023
    1 Answer
    Answer This Question

    A:  Hello. No, but there is an adaptor for it that will allow it to use the same wiring harness connector. That would be the 20-9003, Internet # 325826336, Model # 21032239, Store SKU # 1009901067

    by|Nov 29, 2023
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      Q:Is the mounting and plug compitable with P 12040? I need to replace my old alarms
      by|Nov 16, 2023
      1 Answer
      Answer This Question

      A:  Hello. No and sort of. The bracket will have to replaced but replacing the bracket will just take a screwdriver and a ladder. The wiring harness will not be compatible but we do offer an adaptor so your old wiring harness will work with the new alarm. That would be the 20-9003, Internet # 325826336, Model # 21032239, Store SKU # 1009901067

      by|Nov 29, 2023
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        Q:I am replacing a KN-COSM-1B that went bad with this unit. Why do I have to replace the rest of my detectors when they are working? The only reason I purchased this one is because I couldn’t locate a KN-COSM-1B. The Kidde website said to replace with this
        by|Nov 15, 2023
        1 Answer
        Answer This Question

        A:  Hello. Smoke alarms need to be replaced every 10 years, per the recommendations of the National Fire Protection Agency and required by most local fire codes. Please contact your local authority requiring smoke alarms, usually your local fire marshal's office or local fire department, to find out how often you are required to replace smoke alarms and what type and kind of smoke alarms you are required to have.

        by|Nov 15, 2023
          Showing 1-4 of 177
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          Customer Reviews

          4.7 out of 5
          (1,617)
          • 4.7
            out of 1,617 reviews
          • 88% recommend this product
          Filter by:
          Showing 1-10 of 1,617 reviews
          Good alarm for it’s price
          Good alarm for it’s price, installation was effortless. Still sad it got discontinued.
          by
            • Recommended
            Hardwired but requires annual battery replacement
            Installed in 15 min. Harness wires are short and it’s difficult to (dis)connect quick-connect plug. Battery compartment is on back side of detector so you have to unmount detector to change/check the batteries. If alarm initiates an alert in my system, its LED flashes red to indicate that it was the initiating alarm. After ten years detector sounds automatic alert (2 chirps/60 sec) indicating it has reached end-of-life. Made in China using Malaysian parts.
            by
              • Recommended
              4 found this review helpful
              Great Carbon Monoxide/Smoke Detector replacement.
              I use these for all my rentals and flips. They comes with a clip to convert from any other brand. Easy to install. I have been replacing the back up batteries about three years on average. It seems these units need to be replaced every 7 years. (they start chirping)
              by
                • Recommended
                1 found this review helpful
                Easily replaced my other hard wired, interconnected Kidde smoke and carbon monoxide detector that...
                Easily replaced my other hard wired, interconnected Kidde smoke and carbon monoxide detector that went bad.
                by
                • Verified Purchase
                • Recommended
                This item is being recalled by Kidde
                This Kidde smoke alarm product started sending false alarms from the moment it was installed. I looked up the model for issues and found it was recalled under the US consumer protection website. https://www.cpsc.gov/Recalls/2014/Kidde-Recalls-Smoke-and-Combination-SmokeCO-Alarms Why is Home Depot selling a defective product? Now I have a costly and unsafe product in my home that will not work properly in the event of a fire emergency. Very disappointed!
                by
                  1 found this review helpful
                  This is the updated new version I had installed in my home years ago. The old one had a 7 year wa...
                  This is the updated new version I had installed in my home years ago. The old one had a 7 year warranty, this one has a 10 Year Warranty. Kidde backs up their products- they replaced mine free of charge.
                  by
                  • Verified Purchase
                  • Recommended
                  4 found this review helpful
                  This was exactly what I needed to replace my old ones
                  This was exactly what I needed to replace my old ones
                  by
                  • Verified Purchase
                  • Recommended
                  Package arrived in good condition. I liked there were plenty of different spaced holes in the bas...
                  Package arrived in good condition. I liked there were plenty of different spaced holes in the base to fit most any electrical box for connecting to ceiling. Only needed to loosen two screws to remove the old base and install the new one. Using 3 screw type wire connectors, transferred one wire at a time from the old alarm connector to the new one without having to shut off electricity. And very easy to twist and lock the new alarm onto the base and get the battery opening in any position you want. Pressed the test button on each alarm and as soon as one would go off the other alarm went off too, both alarm and voice, just as advertised. Entire installation for both alarms took under 30 minutes from the time I got the ladder out, read the instruction an put the ladder away. And at 69 years old, I would say it was one the easiest jobs I performed on my house this year. I totally recommend this alarm for the price and ease of installation.
                  by
                  • Verified Purchase
                  • Recommended
                  4 found this review helpful
                  Very simple installation and testing procedures - took me 5 minutes to install. I like this produ...
                  Very simple installation and testing procedures - took me 5 minutes to install. I like this product because it uses battery backup instead of running on batteries. It was a good solid 8 years before I had to replace the original Kidde I bought, so I do like the longevity of the product itself.
                  by
                  • Verified Purchase
                  • Recommended
                  2 found this review helpful
                  Replacement for the first pair I purchased that had expired. Don't know if these will fail before...
                  Replacement for the first pair I purchased that had expired. Don't know if these will fail before the expected lifespan...
                  by
                  • Verified Purchase
                  • Recommended
                  Showing 1-10 of 1,617 reviews

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