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The Kidde Heat Detector, Hardwired with Battery Backup & 2 LEDs, Interconnectable, model HD135F, is an AC/DC powered heat alarm that operates on your home's 120V power source. In the event of a power failure, the Kidde heat alarm comes equipped with a 9-Volt battery backup (included). Using heat sensing technology, the wired heat alarm detects temperatures rising above 135⁰ Fahrenheit, alerting homeowners to dangerous temperatures unlike a smoke alarm, which only detects smoke. Heat detectors are recommended for areas where a smoke alarm may not be appropriate, such as in a kitchen, garage, attic, or other area where smoke or dust may set off a false alarm on a smoke detector. Installing both smoke and heat detectors in a home can provide extra protection while triggering fewer nuisance alerts. The heat alarm includes a quick-connect power harness to make installation fast and easy. An 85-decibel alarm sounds when the high temp sensor detects elevated heat conditions. Two LEDs indicate the heat sensor alarm's status: a green LED is constantly 'on' when AC power is present, and a red LED will flash every 30-40 seconds to indicate that the heat alarm is operating properly; the red LED and will flash rapidly when the unit is sounding until air temperature is reduced. The Kidde heat detector can be used as a single unit or interconnected with up to 24 Kidde devices (18 of which can be initiating) in a multiple-station arrangement, not exceeding the NFPA (National Fire Protection Association) limit of 18 initiating devices (smoke, heat, CO). It is possible to interconnect 6 strobe lights and or relay modules. Ideal for garages. UL Certified with a 5-year limited warranty.
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Kidde Heat Alarm
Kidde HD135F 120VAC Wire In Heat Alarm with 9V Battery Back Up
Rather than smoke, the Kidde HD135F responds to temperatures rising above 135˚F. This unit is interconnectable with other units of the same like. The interconnect system must not exceed the NFPA (National Fire Protection Association) limit of 18 initiating devices (smoke, heat, CO, etc) interconnected. It is still possible to interconnect 6 strobe lights and or relay modules in addition to the 18 initiating devices. This unit is UL Listed.
Consumer benefits
The Kidde HD135F provides you and your family an early warning to dangerous temperatures greater than 135˚F. This unit also includes a tamper resist pin to deter tampering or theft.
What's in the box
One single Kidde 135F smoke alarm. A five-year limited warranty.
Specifications
- Interconnectable – Interconnects with up to 24 Kidde devices of which 18 can be initiating
- Test Button – Tests unit’s electronic circuitry, horn and battery function
- 9V Battery Back Up – Provides continuous protection even during power outages
- Red LED – Flashes every 30-40 seconds to indicate proper operation
- Low Battery Indicator – Alerts user in the event of a low or missing battery
- Quick Connect Power Harness – Makes installation fast and easy
Jay
2025-06-04 18:53:04
I had a combo smoke and carbon detector in my un-insulated garage that recently started tripping the entire system around 12 noon each day (the peak of daytime heat in this recent heatwave). It is a finished garage, but has attic space above with no insulation and also windows to let light in. With the added humidity of being in the south during this latest heatwave, the temperatures were well above 100 degrees, which is what smoke detectors are rated for. I researched and saw that these are made for garages or any other space where smoke isn't necessary, as it only triggers above 135 degrees. Remember, this is in addition to the rest of your system inside, etc. I swapped the smoke detector for this heat alarm and no more issues. I added a plug-in carbon detector for good measure. Perfect alarm for its purpose!
Doctor Ken
2025-06-03 09:56:18
These are as easy to replace as just changing the battery. You unscrew the detector, pull out the power wires, then use a new detector with new battery (instead of the old one with new battery) before putting it back. Easy enough once you can reach the ceiling to do it.The company is very soft on when to replace. The support staff mentioned that a double beep indicates failure while a single beep is just asking for a new battery. So far so good. The unit hadn't actually failed. However, that same advisor suggested they should be replaced anyway as they were 15 years old. The warranty is 5 years, so she advised replacing them. I opted to replace since we have 16 foot ceilings and I would need professional help to reach them--costing more than the new detectors. However, these units appear to use a metalic "fuse" that melts at the appropriate temperature indicating a fire and triggering the alarm. Not obvious how this can go bad--ever.
Riften
2025-05-29 21:27:08
Good to have for garages. Works well.
Minneapolis Kitteh
2025-05-02 14:41:44
Smoke detectors are recommended to be in hallways outside bedrooms. Sigh.Our hallway outside our bedroom is very "conveniently" (hint: NOT) right next to the kitchen, and very close to the gas oven, and we had a ionization/CO alarm that gave us a scare when we first used the oven and called the fire department to confirm if there is any CO leak that we didn't know of when we bought the house. That's when we learned all about "nuisance alarms". The alarm from the apartment where we used to live rarely went off while we cook so - yeah, this annoyance was new to us. Given we have about 10 of these hardwired together when one went off and I hate loud noises, I knew the smoke alarm will be my least favorite of all household electronics.We got this to replace the one next to the kitchen -- it was easy to install and test (with earplugs), and so far it did not throw any tantrums during frozen pizza nights like we used to have. I did not have to replace the existing Kidde wiring harness -- just the mounting plate. It integrated well with the variety of Kidde alarms we currently have (we plan to replace the nuisance ones at some point in the future).I also installed this in our basement to replace the ionization type that we have right beside the laundry/furnace room (that also went off when we are using our flat iron). No nuisance so far, although we make sure we don't put steam directly beneath it. Of course, I also got a separate CO alarm for the basement, though, for added protection.4-stars because while I'd rather chuck each one of these out into the dumpster, I have to have these for my own safety. I don't love it. I like it enough because it saves me from having frequent heart attacks.I wish they'd be able to manufacture more alarms that's ear-friendly, not ear-splitting, while being able to alert you with the situation. Or sound out a voice warning a few minutes before it starts beeping like crazy. It's just ironic how you're supposed to "remain calm" when these things go off, but I usually feel like joining my kitty under the couch when it starts shrieking.
Nicholas Lamb
2025-03-16 20:42:05
Used this to replace the overly sensitive smoke detector located just outside of our kitchen. No more false alarms every time I make a grilled cheese!
Jason Hibbard
2025-01-15 18:06:49
These heat detectors for my garage were the perfect replacement for the old ones. Nice and easy swap.
joeybobb
2024-12-01 15:35:31
easy to install
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