BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup, Single Individual from Contractor Pack
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Tools and Hardware Reviews of BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup, Single Individual from Contractor Pack
Customer Review: Awful, just awful.
Summary: 1 Stars
I have four BRK9120 units in my house, fitted by the builder and wired together.
As others have mentioned, these units will randomly wake you up with low battery alarm sounds, which almost always seem to occur during the middle of the night. Often when you get up to investigate, the alarm stops.
If it doesn't, you have the problem of tracking down which alarm has the low battery, as on an interconnected system they all seem to beep when any of them has a low battery. There's no apparent visual indication of which one has the low battery. The usual process is to replace a battery, wait a couple of minutes to see if the beeping has stopped, go back to bed, get woken up again ten minutes later, replace a different battery, repeat until infuriated.
When you do replace the battery, if you check the one you took out you'll probably find that a battery tester rates it as fine. I've ended up with quite a selection of apparently good 9V batteries that the BRK alarms refuse to use. I've used some of the "bad" 9V batteries in other products, and they still have significant charge.
A bonus feature is that the batteries are fiddly to change during the day; the horizontal pivoting battery holder means that it can take several minutes of pushing and twisting and messing around to get them to go in. Imagine the joy at 3 in the morning while standing on a step ladder.
When the smoke alarm goes off--which it will, because invisible "smoke" from the kitchen at the other end of the house will set it off--there's no off switch. Pulling the battery won't help, because of the AC power. So you have to put up with the ear-piercing shrieking until all the connected alarms decide that the fire has gone. Since you can't see the alleged smoke they're detecting, there's no way to tell which alarm you should be fanning to make them all shut up.
In short, a badly designed product, so infuriating that I'd almost rather risk being burned alive. If I expressed how I truly feel, Amazon would censor my review for swearing. Instead I will simply note that I honestly would not fit a BRK alarm in my house if they gave them away for free. The product is so annoying it has negative value. If you have a relative you hate, fit these smoke alarms in their house.
Customer Review: BEEP, BEEP!
Summary: 1 Stars
I've had 7 of these in my house for 2 years now, and I'm going to replace them. Like many of the other reviewers, I have random beeps from these. It's fairly infrequent, but happens once every couple days, and is a long beep that lasts 1-2 seconds. I've taken all of them down, replaced batteries, cleaned them out with a vacuum cleaner, and did all of the "tricks" people have posted. Nothing works. They still beep, the red light blinks, and nothing in the manual describes this condition.
If you care for your sanity, do not buy this model.
Customer Review: BRK 9120B
Summary: 5 Stars
Easy to install and works perfectly. Although it is advertised as a direct replacement for an older model, it's not quite that easy - you also have to replace the mounting bracket. The electrical connection was identical, however, so no electical work was required. It interfaces properly with a network of the older models.Customer Review: BRK 9120B Smoke Alarm
Summary: 4 Stars
This product is replacement for existing smoke alarms which were ten years old and needed to be replaced due to age. exact fit. good price.Customer Review: BRK 9120B Smoke Alarm
Summary: 5 Stars
The alarms were purchased to replace those that were installed when the house was built and were due to be replaced because of age. The specific model was purchased as it was designed to replace the model originally installed. I was able to use the existing wiring and have not experienced any problems with false alarms. Installation was easy and quick.