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Hardwired Heat Alarm with Battery Backup

This First Alert HD6135FB Hardwired Heat Alarm is a great add-on for crawl spaces, laundry rooms, garages, bathrooms, kitchens, or other applications not suitable for smoke alarm installations. This heat alarm features advanced rate-of-rise sensing technology. The alarm sounds if either the temperature reaches 135° F or if the temperature rises more than 15° F in one minute.

The First Alert BRK Brands Hardwired Heat Alarm with Battery Backup is a performance rich solution that includes numerous safety enhancers to ensure the maximum in overall protection. First Alert BRK Brands Hardwired Heat Alarms feature a near effortless installation process and are easily maintained. The utilization of rate-of-rising temperature sensing and a microprocessor that drastically reduces the number of nuisance alarms make this an ideal addition for any number of settings. A test/silence button and low battery warning have also been included to ensure the maximum in peace of mind. This alarm can also be interconnected with up to 12 other compatible smoke alarms and six compatible devices that include: bells, horns, repeaters and door closers. Should one unit trigger an alarm, all of the smoke alarms in the series will alert your surroundings. A power indicator will reveal which alarm in the series initiated the disturbance.

First Alert Hardwired Heat Alarm with Battery Backup HD6135FB

Product Details
Product Specs
Smoke Alarms and Smoke Detectors
Product Manuals

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HD6135FB customer reviews

Overall Rating

36 Reviews
36 customers recommend this product
First Alert BRK Hardwired Heat Alarm with Battery Backup Reviews
November 17, 2023
Verified Purchase

Order was a little slow but the product is great! Easy to unbox, everything was there and just as ordered. Mounting was easy as well as the wiring. Tested and verified units so all went surprisingly well! Would highly recommend.

Mary C
September 26, 2022
Verified Purchase
quick turn around

Product was delivered very quickly and was exactly what I expected. Thank you

Michael W
September 8, 2022
Verified Purchase

Just what I needed and quick delivery

Joseph M
September 8, 2022
Verified Purchase
Heat detector

Fast shipping and packaged well I will be placing another order soon

Thomas D
August 29, 2022
Verified Purchase
Heat Alarms

Items delivered promptly

Teri R
August 20, 2022
Verified Purchase
Heat Alarm HD6135FB

I replaced the 2 alarms in my garage about 3 weeks ago. The First Alert Heat Alarms were still working perfectly but because they were 11 years old I decided to replace them. I received them very quickly and the install was simple, I was able to use the existing ceiling ring because the style of the new device fit perfectly. My entire house is hardwired with First Alert smoke and carbon monoxide alarms. I have called on several occasions and the customer support personnel are extremely helpful.

Forrest L
July 7, 2022
Verified Purchase

The product works as advertised. I installed one in the garage and one in the hallway. Many home fires start in the garage and we wanted to be woken up in our bedroom if the fire starts in the garage. The alarm in the hallway is loud enough for all occupants in the house can hear it and evacuate.

Robin F
January 17, 2022
Verified Purchase
Avoid supply chain issues

I am far from installing them as I am just roughing in the electrical. I bought them now to avoid potential supply chain issues in May. They are rated amongst the best and there seem to be a sparse choice of hardwired heat/rate-of-rise alarms

Joe B
October 18, 2021
Verified Purchase
Safety in the Garage with Heat Alarm

This heat alarm was very easy to install and set up. It is hardwired, but also has battery back up in case of a power outage. This is being used in a 2 bay garage. So two cars plus all the other items normally in a garage. Potential fire hazard, so with this alarm the family and home are protected and warned early if fire breaks out in the garage.

Warren F
September 29, 2021
Verified Purchase
Great Solution

I had a Smoke / Carbon detector installed near my kitchen which would go off repeatedly whenever I cooked anything. I replaced it with this fire detector and it works perfectly. Highly recommended. The company shipped the product immediately so the customer service is great too

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