FireX Hardwired Interconnectable 120-Volt Smoke Alarm with Battery Backup-21006376 - The Home Depot


Model # 21006376

Internet # 202029420

Hardwired Interconnectable 120-Volt Smoke Alarm with Battery Backup

FireX Hardwired Interconnectable 120-Volt Smoke Alarm with Battery Backup

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

$17.48 / each


Model # 21006376

Internet # 202029420

Front battery pull tab allows battery activation without removing alarm from mounting bracket. Large mounting base makes mounting easier, protects surface paint from dirt and covers imperfections. Pre-stripped wiring harness with easy off cap does not require stripper tool. Tinned strands increase conductivity and wire nut grip. Battery run down protection will shut down alarm memory when AC power is not present, reducing low battery chirp. Dust cover protects sensor from contaminates during construction reducing nuisance alarms.

  • One button design for easy operation and less confusion
  • Tamper resist locking feature deters alarm theft
  • Interconnectable with up to 24 devices
  • Ionization sensing technology
  • Note: product may vary by store
  • Note: product may vary by store

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Assembled Depth (in.)  2.18 in  Assembled Height (in.)  6.1 in 
Assembled Width (in.)  6.7 in 
Alarm Sensor Type  Ionization  Alarm Type  Smoke 
Alarm/Detector Features  Battery Back-Up,Hush Feature,Interconnected  Commercial / Residential  Commercial / Residential 
Connector/Contact Type  2-Wire  Electrical Product Type  Smoke Detector 
Included  Batteries  Power Source  Hardwired 
Returnable  90-Day  Voltage (volts) 
Warranty / Certifications
Certifications and Listings  1-UL Listed 


Rated 4.7 out of 5 by 74 reviewers.
Rated 5 out of 5 by Great product - Easy install Had to replace old smoke detectors that were over 12 years old. I know way past over due !! After looking at reviews and the product myself I decided on this one, glad I did the old ones were a different manufacturer so the plug in was different, but this one came with its own hard wiring, if you needed like me to change plug in. SUPER EASY I had 4 of these units installed in less than 30 minutes... Work great, something as important as smoke detectors I would NOT give a good review if they weren't that good.. They are LOUD also... February 10, 2014
Rated 5 out of 5 by Convenient smoke detectors Our handyman recommended these smoke detectors. Said smoke detectors should be replaced every 10 years or so. When I told him I thought the old ones were pathetic--so hard to get off the ceiling and back up there once the batteries were changed, and why on Earth nobody has thought to make one that's easier, he said THEY HAVE--and he recommended Fire-X! He installed them really fast (must not have been too hard to do), and now when a battery needs replacing, we don't have to take the whole thing off the ceiling--you just open a little door on the side of the smoke detector, slide out the old battery, and slide in the new one! Pretty cool! Wish we'd done this years ago. Sure beats standing on top of a big ladder with your arms over your head trying to get the thing off the ceiling and back up again! July 8, 2014
Rated 5 out of 5 by Like plug and play We made certain that we purchased the same brand of fire/smoke alarm so it would be plug and play. That was according to the article we read on the internet. Worked like a charm and we replaced all three alarms in under an hour. Ours are hard wired so just had to remove the cover, unplug the old unit, plug in the new unit and replace cover. December 10, 2014
Rated 3 out of 5 by It works The smoke alarm was easy enough to install even thou I had to modify the base to fit the existing box in the wall. I tested and it works. I can't say much about a smoke detector. The really test will be when a fire occurs but I hope that never happens. December 10, 2014
Rated 5 out of 5 by Excellent home smoke alarm replacement product I bought 10 units. All were easy to install with easy attachment device included. All units are working well. Only one unit had discharged battery which I had to replace. This is a excellent product for replacing old one in the house. December 10, 2014
2 3 4 5  ... 8 >>


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

Orders for this item may be expedited for an additional fee.

Other Delivery Options:

Express and Expedited shipping options are also available. Estimated arrival times are available in checkout.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.