FireX Hardwired Interconnectable 120-Volt Smoke Alarm with Battery Backup (4-Pack)-21007588 - The Home Depot


Model # 21007588

Internet # 202029423

Store SKU # 802605

Hardwired Interconnectable 120-Volt Smoke Alarm with Battery Backup (4-Pack)

FireX Hardwired Interconnectable 120-Volt Smoke Alarm with Battery Backup (4-Pack)

This item has been discontinued.
The Home Depot no longer carries this specific product.

$54.00 / each


Model # 21007588

Internet # 202029423

Store SKU # 802605

The Walter Kidde Hardwire Smoke Alarms (4-Pack) alert you to potential fire dangers by detecting the presence of smoke and heat in the atmosphere. These alarms are equipped with 2 pre-stripped wires for easy installation and have a 9 Volt battery backup to ensure continued use during a power failure. The alarms feature a dust cover that protects the internal sensor from airborne contaminates that may take flight during a fire or a construction job.

  • Detects smoke and heat for reliable protection against fire
  • Hush alarm control button silences false alarms
  • Test button allows you to check functionality without sounding the full alarm
  • 9 Volt battery backup provides protection during power outages
  • Battery is easily accessible through the front pull tab
  • Pre-stripped wiring harness with easy-off cap ensures quick installation
  • Dust cover protects the sensor from contaminates
  • Rated to 120 volts
  • 360-degree mounting bracket allows mounting from any angle
  • 4 detectors included

Info & Guides

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Assembled Depth (in.)  9 in  Assembled Height (in.)  6.5 in 
Assembled Width (in.)  6.5 in 
Alarm Sensor Type  Ionization  Alarm Type  Smoke 
Alarm/Detector Features  Battery Back-Up,Hush Feature,Interconnected,Value Pack  Commercial / Residential  Commercial / Residential 
Connector/Contact Type  2-Wire  Included  Batteries 
Power Source  Hardwired  Returnable  90-Day 
Voltage (volts)  120 
Warranty / Certifications
Certifications and Listings  1-UL Listed 


Rated 4.2 out of 5 by 42 reviewers.
Rated 4 out of 5 by No Chirping These were a breeze to replace existing units. So far (3 months) no chirping. Got to say they seem to be pretty good quality. Giving them an excellent rating on the easy install and they were compatible with the existing units as far as having them all go off. But still I replace all the old units because of the random chirps. It's just hard to give a smoke detector 5 stars until a fire breaks out and everything goes well :) December 10, 2014
Rated 5 out of 5 by Smart Buy I replaced the detectors with the same ones that were installed when the house was built 12 years ago. I had read that they should be replaced every 10 years. These went 2 years longer but only a couple were giving me a problem. It took about 5 minutes each to replace. October 14, 2014
Rated 5 out of 5 by Quick Install At A Great Price Great new or replacement hard wired smoke detector. Only takes minutes to install and great instructions make that job easy. I highly recommend these units and they are competitively priced. December 17, 2014
Rated 1 out of 5 by Not of good quality I purchased this product a month ago and I was awakened last night by chirps. I am not sure what is wrong here, but now 3 of the 4 are chirping every few seconds. Very disappointing because I paid an electrician to get up there and install them. I have no clue how to install. I wish this store would quit selling cheap inferior products that cost customers money out of pocket and inconvenience them by having to uninstall, drive to the store to return, exchange, reinstall - what a mess! November 26, 2014
Rated 5 out of 5 by Good value, no unnecessary bells and whistles. So far so good Used two of these reasonably priced 4-packs to replace eight older Kidde alarms, since two of them had failed after about 7 years. Have 8 interconnect alarms in my home, so a false alarm in the middle of the night is not pleasant. Was able to use the existing AC quick connect wiring (Kidde/Firex standard) which cut down on replacement time. I like the new accessible battery compartment that doesn't require unmounting the alarm. After installation, all tested well interconnected, with hopefully no false alarms to come. The dust cover mentioned in the description is simply a "mini shower cap" the protects the alarm while building construction is in progress. You don't want to leave it on. March 20, 2012
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