Kidde Hardwire Interconnectable 120-Volt Smoke Alarm with Battery Backup (6-Pack)-21006373 - The Home Depot


Model # 21006373

Internet # 100179554

Hardwire Interconnectable 120-Volt Smoke Alarm with Battery Backup (6-Pack)

Kidde Hardwire Interconnectable 120-Volt Smoke Alarm with Battery Backup (6-Pack)

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

$65.97 / each


Model # 21006373

Internet # 100179554

Kidde 21006373 contractor 6 pack is sold as one master pack that contains 6 individual units. These alarms are 120-Volt hardwire ionization smoke alarm with 9-Volt battery backup and Hush feature. Smoke alarms have the ability to function as single units or in an interconnected system.

  • Test button, tests unit's electronic circuitry, horn, and battery function
  • Hush feature - temporarily silences nuisance alarms
  • Quick connector - makes installation fast and easy
  • Tamper resist locking pin - helps deter alarm tampering and theft

Info & Guides

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Assembled Depth (in.)  10.7 in  Assembled Height (in.)  6.5 in 
Assembled Width (in.)  6.6 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 4.6 out of 5 by 56 reviewers.
Rated 5.0 out of 5.0 by Replacement alarms The smoke alarms that were installed when the house was built (2004) started to malfunction (false alarm at 3 a.m). Pulled down the offending alarm and saw where it had a 10 year life so decided to replace all of them. Checked with Home Depot online and found a replacement pack. Had them delivered (free) a few days later. Got out my ladder, disconnected the old alarms, put in the new alarms which had the same connectors, and was finished in about 30 minutes. And they even came with batteries already installed. January 6, 2015
Rated 5.0 out of 5.0 by Easy for the novice DIYer I have 6 older (12 years) smoke alarms from Firex (Kidde) and when 2 of them started to act up (chirping when the battery was good and no green light showing on one and one green light blinking) I called Kidde and was told this model would be an exact match. So I ordered them and less than a week later had them. I decided to replace the mounting brackets as the old ones were yellowed with age, and that was easy to do (just 2 screws involved). I would recommend wearing a headlamp with a swivel lens as it can be dark near the ceiling and plugging the new alarm in is much easier with good light. May 3, 2014
Rated 4.0 out of 5.0 by Good replacement for earlier model Even though this was a new product with a new item number, it fit well into the mounts and wiring for the earlier Kidde predecessor model. September 23, 2014
Rated 5.0 out of 5.0 by Exact replacement Bought these to replace our 12 yr old alarms that came with our new home. We didn't have to do any adjustments, just remove the old unit & base and replace with the new. January 28, 2014
Rated 5.0 out of 5.0 by Great replacement detectors for an older model. I bought these detectors to replace ones that were over 10 years old (I believe the older model was Kidde 1275). These new ones were easy to install and plugged right into the old hardware and electrical. October 29, 2013
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