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

Was   $65.97
$46.18 / each
(limit 5 per order)

Save $19.79 (30%) through 10/26/2014

Online Exclusive Pro Special Buy of the Week
Promotion Details
Price Valid : 10/20/2014 - 10/26/2014
Online Exclusive Pro Special Buy of the Week

Pro Special Buy of The Week. Add item to cart to check availability as quantities are limited. Discount will only apply to the first five (5) items per order. Offer limited to specific colors and/or sizes.
Item cannot be shipped to the following state(s): GU,PR,VI


In Stock



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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Alarm Sensor Type  Ionization  Alarm Type  Smoke 
Alarm/Detector Features  Battery Back-Up,Hush Feature,Interconnected,Value Pack  Assembled Depth (in.)  10.7 in 
Assembled Height (in.)  6.5 in  Assembled Width (in.)  6.6 in 
Certifications and Listings  1-UL Listed  Commercial / Residential  Commercial / Residential 
Connector/Contact Type  2-Wire  Included  Batteries 
Returnable  90-Day  Voltage (volts)  120 


Rated 4.6 out of 5 by 32 reviewers.
Rated 5 out of 5 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 out of 5 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 out of 5 by Safe again It was time to replace 10 year old original smoke detectors and this set was priced right. September 20, 2014
Rated 5 out of 5 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
Rated 5 out of 5 by good product Kidde contractor 6 pack: I have 12 smoke alarms in the house and keep buying these to replace them as they go bad. PRO: Very few false alarms; easy to swap out old ones with new ones as the mounting bracket and wiring connector are compatible with other kidde products. CON: difficult to tell which one has gone off when they are all interconnected. You need to watch the pattern of the blinking green light. Seems that Kidde should have a better system to let you know which one went off. April 23, 2014
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