The BRK hardwire heat alarm is ideal for use in attached garages and other locations where standard smoke alarms are not suitable. The unit alarms if either the temperature reaches 135 degrees Fahrenheit or the temperature rises more than 15 degrees Fahrenheit in one minute.
The HD6135FB hardwire heat alarm includes these features:
120-volt AC/DC with 9-volt battery backup
135 degrees Fahrenheit fixed rate and rate-of-rise temperature sensing
Microprocessor controlled for fewer nuisance alarms
The test/silence button both silences a non-threatening alarm or low battery warning and allows you to test the unit’s functionality. Silencing and testing functions can be run by most household remote controls such as the ones used for the television, stereo, and VHS or DVD players.
Latching alarm indicator which automatically identifies which unit initiated the alarm.
120-volt AC inter-connectable (with maximum 18 compatible devices). The alarm can be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. Power indicators show which unit in the series initiated the alarm.
85-decibel horn.
Meets UL requirements.
10-year limited warranty.




James A Flamand –
Great unit easy to hook up
Yuri Rozenvayn –
I bought this as a direct replacement for my Garage. The previous model (Same model #) only had a 5 year lifespan and died after 6. I was happy with the functionality of the previous model and this one seems to be just as good.
JIM –
easy to install / hope it never goes off / in my garage installed / 2 cars and workshop / heated.
Scott Lentz –
Perfect – item at great price.
Anonymous –
Great for garage – replaced an older one dated 2007. Very pleased to see this unit dated 2016 so it didn’t sit on a store shelf. Wish the heat-only model needed for a garage was also available in a 10 year battery version like the smoke/CO2 varieties.
Russ Geldmacher –
I purchased 4 heat dectors. Fair prices and VERY rapid shipping.
John Caruso –
Everything arrived as ordered and on time. I will do business with them again.
Adam Steigrod –
Easy, informational, and quality. Nothing old about the detectors they sell. Thank you for the guidance.
Steve –
Enjoy your company and it’s products!
Mark Hare –
I have placed orders several times and have always been pleased with the fast service and great pricing.
Miguel Gallegos –
I tried it first moving the Heat Alarm from the refrigerator (35F) to the car (135 F) and it worked!
Judy Palmer –
Received very promptly & installed easily
Dan MacDonald –
It is always a great experience working with Eric and the rest of the sales and support team at Smoke Alert
Joseph Bresnahan –
fast free shipping and saved a lot of money and first alert is a good brand
Anonymous –
Always a good experience with Smoke Alert. Thank you for quick delivery.
Kenneth Short –
Waiting on to install all together for compatability
david galligani –
Shipped when you said and quality and service is always excellent. Only place I buy alarms from
avic –
was easy to mount in my garage, lots of junction boxes to choose from… did not need an electrician.
a neighbor had a fire in their garage, which made me realize that we do not have any detectors in our garage…
Bill Wanamaker –
Great product and service, best price anywhere, thanks!!