Customer Reviews For The First Alert BRK Hardwired Heat Alarm with Battery Backup

Overall Rating

36 Reviews
36 customers recommend this product
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

connie c
September 16, 2021
Verified Purchase
works as expected

Needed this item for my garage. Arrived sooner than expected and got a good price and free shipping. So far so good. It is working.

Robert A
August 3, 2021
Verified Purchase
10 years of protection

My first HD6135FB lasted the promised 10 years being manufactured in 2011. Ordering from First Alert was easy. Installation was also easy. A quick unplug of the old unit, replace the mounting base piece the new unit was slightly larger than the old one plug in the new unit, Test as identified in the instructions and I was good to go, The entire process including reading the manual took less than half an hour.

Joe M
August 2, 2021
Verified Purchase
Garage Heat Detector Replacement

Replaced a 10 year old detector with this device. I ordered on line, arrived quickly. The new unit was a perfect replacement & functioned within the existing system.

William C
July 30, 2021
Verified Purchase

no problem with service or product Would recommend

Carol L
July 14, 2021
Verified Purchase
Inexpensive insurance

Have one of these in my basement and one in attached garage. Gives me peace of mind

Steve D
July 6, 2021
Verified Purchase
Great Price, Fast Shipping & Delivery

Ordered this for our garage now that we've got a hybrid car that's occasionally plugged in overnight to charge. Buying this direct from First Alert got me the best price available on-line significantly less than big-box retailers and other sellers. Received a 9V Duracell battery along with the detector, which saved me a trip to the store for a backup battery. Installation and wiring was straight-forward. Alarm is quite loud - if there's a problem in your garage, you'll definitely hear it! Strongly recommend for garages and any other storage areas subject to significant temperature changes over the course of the year.

William C
June 10, 2021
Verified Purchase


Charles M
May 12, 2021
Verified Purchase
FInally - a heat detector with an external battery compartment!

We have 2 heat detectors in our garage, which has very high ceilings. Changing the batteries has always been a pain as you have to dismount the detector in order to access the battery. No more - now we can just reach up and open the battery door and change the battery.

Robert O
April 2, 2021
Verified Purchase
Heat alarm

Arrived ahead of schedule and easy to install

Robert O
April 2, 2021
Verified Purchase
Heat alarm

Arrived ahead of schedule and easy to install

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

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