Model # 21008051

Internet #100051755

Store SKU #182262

Store SO SKU #198092

Kidde Battery Operated Ionization Smoke Alarm
0025417009149

Kidde

Battery Operated Ionization Smoke Alarm

  • Compact design
  • Test button
  • Ionization sensor
$4.98 /each

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Product Overview

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The Kidde i9040 Battery-Operated Ionization Smoke Alarm is a single-station alarm with an early warning signal. This alarm utilizes ionization sensing technology to activate in the event of a smoke or fire incident and its compact, 4 in. design lends it a discreet profile in your home or business. Powered by a 9-Volt battery, this smoke alarm will protect you, your family and home during a power outage. When the battery begins to lose power, a low-battery alert will begin to chirp to notify you it is time to replace.

  • Utilizes ionization sensor
  • Provides an early warning signal in the event of a smoke
  • Compact 4 inch Design
  • Low-battery indicator chirps to alert you to change the battery
  • Test button tests the unit's electronic circuitry, horn and battery function
  • Battery power means protection during power outages
  • 9-Volt battery included use Kidde power supply (205976052)
  • 9 Volt Zinc Battery Included
  • Note: product may vary by store
  • Click here for more information on Electronic Recycling Programs

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Customer Questions & Answers

How to disarm the smoke alarm

Asked by: P3
Open a window or take out the battery til smoke clears.
Answered by: Kdd999
Date published: 2016-10-23

How do you install it?

I am a novice
Asked by: BM
It is mounted on a bracket that is screwed into place.
Answered by: CommunityAnswer
Date published: 2016-08-06

Install it on the wall at eye level?

Can I attach this to the wall at eye level? Then if it chirp I could easily check it. No ladder would be required.
Asked by: Avi
Hello Avi. No. Smoke rises and pools on the ceiling. The smoke has to flow into the back side edges to detect smoke. The room would have to fill with smoke DOWN to the level of the alarm for the alarm to detect the smoke. The alarm should go on ceiling or, if the ceiling is flat, it can go on the wall within a foot of the ceiling. If it is a sloped or angled ceiling, smoke alarms in rooms with ceiling slopes greater than 1 foot in 8 feet (.3m in 2.4m) horizontally shall be located on the high side of the room. We can answer further questions about this at Kidde Product Support at 1-800-880-6788. Thank you for your interest.
Answered by: Kidde Expert
Date published: 2015-10-13

What is the db level of this alarm?

Asked by: Susheel
Hello Susheel. Our alarms are 85 decibels at 10 feet. We are Kidde Product Support at 1-800-880-6788. Thank you for your interest.
Answered by: Kidde Expert
Date published: 2016-06-09

Does this item comply with California codes for rental homes and homes for sale? A new California...

Does this item comply with California codes for rental homes and homes for sale? A new California Law, SB 745 has changed the rules regarding smoke alarms, and requirements for landlords. Starting July 1, 2014, any smoke alarm installed that is solely battery powered MUST contain a non-removable battery that is rated to last 10 years. An exemption exists for battery powered smoke alarm installed prior to July 1, 2014, but that expires on July 15, 2014. On July 1, 2015 ALL old smoke detectors that are solely powered by batteries must be replaced with those that contain a sealed battery that is rated to last 10 years. Effective July 1, 2015, all smoke alarms powered by 120 VAC or battery must comply with the provisions of having a label showing date of installation & manufacture. SB 745 also requires that for all dwelling units intended for human occupancy, for which a building permit is issued on or after January 1, 2014, for alterations, repairs, or additions exceeding one thousand dollars ($1,000), the permit issuer shall not sign off on the completion of work until the permittee demonstrates that all smoke alarms required for the dwelling unit are devices approved and listed by the Office of the State Fire Marshal pursuant to Health and Safety Code Section 13114.
Asked by: Sunny
I live in Massachusetts you should tarket someone in California
Answered by: raj22
Date published: 2016-11-17

are these by code per the city of glendale?

Asked by: alex
Hello Alex. You will need to call your local authority having jurisdiction in your area for smoke alarms, usually the local fire marshal's office. We are Kidde Product Support at 1-800-880-6788. Thank you for your interest.
Answered by: Kidde Expert
Date published: 2016-03-01

why are there answers and photos of a different alarm on here. the one we are looking at is a 5$ smoke detector

Asked by: donutlou
Hello Donutlou. The picture is correct. The questions for this alarm has gotten mixed with the questions for a different alarm, Model # KN-COEG-3, Internet #100003545, Store SKU #791898, Store SO SKU #198092 so the same questions are showing up on both pages here on Homedepot.com. The matter is being corrected and we hope it will be fixed within 2 weeks. Thank you for your help pointing this out. If we can help you further, we are Kidde Product Support at 1-800-880-6788. Thank you for your interest.
Answered by: Kidde Expert
Date published: 2017-01-10

what does "ionization" mean?

Asked by: amt
Hello AMT. Ionization is a type of technology for detecting smoke. These alarms have a very tiny flake of slightly radioactive material between two metal plates in a sealed chamber with air slots. The radioactive material gives off ions. These ions hit the metal plates and creates a small electric charge between the two plates. When particles of smoke and combustion get into the alarm, they absorb the ions and keep them from hitting the metal plates. When this happens, the electrical charge is reduced or not created. The alarm detects this drop in charge and that's how it knows when to go off. This is Kidde Product Support at 1-800-880-6788. Thank you for your interest.
Answered by: Kidde Expert
Date published: 2016-02-01
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Customer Reviews

Battery Operated Ionization Smoke Alarm is rated 4.3 out of 5 by 218.
Rated 3 out of 5 by from It's certainly a low-budget smoke detector and feels every bit as much (including the flimsy way ... It's certainly a low-budget smoke detector and feels every bit as much (including the flimsy way it clicks to its mounting plate). The real detractor for me was that it's too small to use as a replacement for normal-sized smoke detectors (the traditional First Alert detectors). Unlike what's shown in some of the pictures, the mounting plate is the same diameter as the rest of the unit. That means the screw holes are too close together to use the existing holes - if you use one of the existing holes in your ceiling, the other hole will be exposed on the outside of the mounting plate.
Date published: 2016-12-27
Rated 1 out of 5 by from Stay away!! These detectors have been a headache starting 30 days after install. The batteries need to be changed. Constant false carbon monoxide alarms. I've had a licenses plumber/heater determine there are no gas leaks. I've also had the fire department conclude the alarms are faulty. There is nothing setting them off. It seems the batteries leaked after only 30 days of use and now unless I change them every 30 days I have false alarms. It's stressful on my tenants and on me since I am a long distance landlord and bought these for peace of mind but all they do is deliver the opposite, noise and stress. Completely unreliable. Pick a different brand.
Date published: 2016-08-26
Rated 2 out of 5 by from Drains battery I assumed the battery was for back up but I guess that uses it all the time even when it's plugged in. You have to replace the battery every two months in this thing. I come home to it beeping low battery. It's quite heavy in the outlet and can easily be knocked out of the plug. The dog knocked it intentionally out of the wall, after it battery beeped all day, when I got home it was on the ground and the dog was looking upset.
Date published: 2016-09-24
Rated 4 out of 5 by from If you are looking for a basic, affordable and easy to install smoke detector, then this is the ... If you are looking for a basic, affordable and easy to install smoke detector, then this is the one. According to studies, the photoelectric is preferred, but I'm ok with the Ionization smoke alarm.
Date published: 2016-11-08
Rated 5 out of 5 by from Looks good Bought this to replace the similar unit which aged out (10 years). This has combustible gas in addition to CO. Installs easily: put in the included battery and plug it in.
Date published: 2016-09-27
Rated 4 out of 5 by from For the price, this can't be beat. Works well, no problem so far. For the price, this can't be beat. Works well, no problem so far.
Date published: 2017-01-18
Rated 4 out of 5 by from Good value for a home safety device. Especially important for older folks who may have lost part... Good value for a home safety device. Especially important for older folks who may have lost part or all their sense of smell. I just turned 74, and was concerned that I may not be able to smell a gas leak if it occurs. Now I feel a lot more secure. The instructions are a bit long, but for good reasons. I encourage each user to read and understand these instructions, to avoid the instinctive mistakes that I might have made otherwise; i.e. placing it in the garage or near the heater in the attic. Sensible design allows the unit to be placed in an easily visible but inconspicuous part of my bedroom.
Date published: 2017-01-11
Rated 5 out of 5 by from Reliable Product We bought a half-dozen of these, for the house and garage. They have been reliable and plenty loud enough. Only caveat... If you are using them in a kitchen, without a range hood... Keep the sensor clean and unclogged! If you don't wipe the cover with a good degreaser, once a month, the sensor can't function and the alarm will not go off!
Date published: 2016-09-20
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