Kidde Hardwired Interconnectable 120-Volt Heat Alarm 135 degree with Battery Backup-HD135F - The Home Depot


Model # HD135F

Internet # 100594387

Store SKU # 146421

Hardwired Interconnectable 120-Volt Heat Alarm 135 degree with Battery Backup

Kidde Hardwired Interconnectable 120-Volt Heat Alarm 135 degree with Battery Backup

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

$28.97 / each


Model # HD135F

Internet # 100594387

Store SKU # 146421

Store SO SKU # 198092

The Kidde Heat Alarm with 9-Volt Backup provides your home with an early warning detection device of temperatures exceeding 135 degrees Fahrenheit. This heat alarm offers a test button that checks the functionality of the unit's horn, battery and circuitry for peace of mind. Interconnect this alarm with up to 24 other detection devices to create a fire alarm system that senses for heat, smoke and carbon monoxide.

  • Receive an instant alert when temperatures exceed 135 degrees Fahrenheit
  • Test button assures proper operation of the sensor's electronic circuitry, horn and battery function
  • Interconnects with up to 24 Kidde devices (of which 18 can be initiating), including smoke and carbon monoxide alarms
  • 9-volt battery backup provides continuous protection even during power outages
  • Red LED flashes every 30 - 40 seconds to indicate proper operation
  • Quick-connect power harness for fast and easy installation
  • Tamper-proof pin helps deter tampering and theft

Info & Guides

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Product Depth (in.)  Product Height (in.) 
Product Width (in.) 
Alarm Sensor Type  Dual-Sensor  Alarm Type  Heat 
Alarm/Detector Features  Battery Back-Up,Battery Back-Up,Interconnected  Commercial / Residential  Commercial / Residential 
Connector/Contact Type  None  Heat Detection Type  Fixed Temperature 
Included  No additional components or accessories are included  Power Source  Hardwired 
Returnable  90-Day  Voltage (volts)  120 
Warranty / Certifications
Certifications and Listings  1-UL Listed 


Rated 4.5 out of 5 by 12 reviewers.
Rated 5.0 out of 5.0 by No more false alarms. Fumes from my Street Rod would set off my house alarm,usually at 2 or 3 AM. My son in law (ex Firefighter) told me the make heat detectors. I bought one online and it was plug and play. Took just a couple minutes to install. No false alarms since then. August 19, 2014
Rated 5.0 out of 5.0 by Not a sprinkler but better than a smoke detector I prefer to install a sprinkler in the utility room, garage and kitchen. These are areas that tend to give false alarms yet have a potential for fires. I like this unit since it connects to the other smoke detectors yet does not false alarm. I am a former fire fighter. September 2, 2014
Rated 4.0 out of 5.0 by Kidde-Firex Heat Detector My old Firex smoke and heat detectors were ten years old, their maximum expected life, so I replaced them all. Firex was bought by Kidde a few years ago, and I was hopeful that the "Kidde Firex" brand detectors would use the same plug-in hook-ups from the 120 volt wiring in the ceiling to connect to the detector. Unfortunately, Kidde has changed the plug configuration, so I had to shut down the circuit and replace the pigtail plug-ins for all 9 detectors in the house, creating a much more involved job. The old Firex mounting brackets screwed to the box in the ceiling also didn't fit the new detectors and needed to be replaced by the new mounting brackets that came with the detectors. I installed 3 code-required heat detectors, two in the attached garage and one over the oil burner in the basement. The other 6 were smoke detectors, not part of this review. Since I have not had a fire, I don't know how well they work, and hope I never find out. But I have some peace of mind for the next ten years, until they need replacement again. I just hope Kidde doesn't change plug configurations again between now and 2024. If they do, they (or Home Depot) should make it plain in their literature and packaging. August 12, 2014
Rated 4.0 out of 5.0 by Careful Placement Necessary I put the unit in the attic, near the gas furnace. After enduring the heat of summer, no alarms, then on the first really cold day in the fall, I turned the heat on for the first time, after it had already gotten really cold outside . The 15 degrees change in one minute got it. A False alarm that set the other smoke alarms off. Scared me. When the temp increases suddenly, it will go off with out reaching 135 . Placement is very important to reduce false alarms. I took it out of service. October 21, 2013
Rated 4.0 out of 5.0 by Kidde Heat Detector Seems a Fine Product This was a good product and fairly easy to install. I installed it on then ceiling of the utility room in our condo, where the furnace & air handler are kept. This unit replaced a much older one that had broken off the bracket. Safest bet is to change these units out every 10 years and this particular one was almost on 20 years. We've only lived in the condo for 4 years, and I recently found out how old our detector was. November 6, 2013
Rated 5.0 out of 5.0 by Good Product These were easy to install. We hope to never need them, but they give us some comfort. Put 1 in basement, 1 in kitchen & 2 in garage. We wired them to work together. These are places where smoke alarms may go off falsely. We like the idea that if we're in the house with problem in the garage the ones in the house will alarm too & vice-a-versa. April 30, 2014
Rated 5.0 out of 5.0 by Just As Expected Installed two of these in the basement, one in the laundry room and one in the furnace room. Inter-connected them with the smoke & carbon monoxide detectors. Good price. Be sure to look up proper placement/use of heat detectors. They cannot replace smoke detectors, but can supplement them! February 25, 2014
Rated 4.0 out of 5.0 by Items looks good and was what I needed. This item is what I was looking for. It is used near an older furnace so the heat function is very useful. A regular smoke detector would be set off by the soot in the air causing false alarms. April 10, 2012
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