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BRK Brands SC9120B Hardwire Combination Smoke/Carbon Monoxide Alarm with Battery Backup | 
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| Brand: BRK
Category: Home Improvement
List Price: $68.99
Buy New: $24.95
You Save: $44.04 (64%)
New (23) Used (1) from $24.95
Avg. Customer Rating:  9 reviews
Sales Rank: 231
Media: Tools & Hardware
Shipping Weight (lbs): 0.8
Dimensions (in): 5.9 x 5.8 x 2.5
MPN: SC9120B
Model: SC9120B
UPC: 029054513069
EAN: 0029054856425
ASIN: B000HEC4EO
Release Date: May 2, 2007
Availability: Usually ships in 1-2 business days
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| Features:
| • | Superior carbon monoxide sensor and dual ionization smoke alarm | | • | Inter-connectable with BRK and First Alert hardwired smoke and carbon monoxide alarms | | • | Easy to install universal mount bracket | | • | Simple to use silence/test button; separate smoke and CO latching alarm indicators | | • | 9-volt battery included; 5-year limited warranty |
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| Editorial Reviews:
Amazon.com Product Description
The BRK hardwire combination smoke and carbon monoxide alarm detects two hazards with one simple unit. Carbon monoxide (CO) is a colorless, odorless, deadly gas. It can be emitted by sources including gas or oil furnaces, gas clothes dryers, water heaters, fireplaces, wood stoves, charcoal grills, gas ranges, and space heaters. A clogged chimney, improper venting, and attached garages can also cause carbon monoxide accumulation. According to the Consumer Product Safety Commission (CPSC), at least one CO alarm should be installed near a home's sleeping area. The BRK SC9120 hardwire combination smoke and CO alarm with battery backup includes these features: - Quick plug-in power connector for easy installation.
- 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.
- Ionization sensor which is more effective at detecting flaming fires which consume combustible materials rapidly and spread quickly.
- Microprocessor controlled for fewer nuisance alarms.
- Single test/silence button which both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality.
- Automatically performs internal test of functionality.
- Latching alarm indicator which automatically identifies which unit initiated the alarm.
- Separate smoke and carbon monoxide visual and audible warnings.
- Battery drawer lock and mounting bracket lock for tamper resistance.
- AC power indicator and alarm indicator light.
- Low battery warning "chirp" and missing battery tab.
- 9-volt battery backup for peace of mind during power outages.
All BRK Electronics carbon monoxide alarms are listed to UL Safety Standard 2034 for residential carbon monoxide alarms. Includes 9-volt backup battery. 5-year limited warranty.--Bree NorlanderWhat's in the Box
One combination smoke and CO alarm, one 9-volt battery, and user's manual
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| Customer Reviews: Read 4 more reviews...
 BRK SC9120B Hardwired November 17, 2008
Originally had BRK alarms, but did research anyway as my alams were 15 years old. After doing my research decided on replacing all four of my existing alarms with this model, SC9120B. For just a few dollars more I figured it was worth having the CO2 detector on all levels of the house. Installation was simple, I replaced the connectors with the power on, if you are careful and do not ground yourself if is much faster. You will get a shock if you are not careful. Actually I got one when doing the cathedral ceiling unit. The units went right in. HOWEVER one of the units was defective, it worked but did not trigger the other units to go off. After some switching of units I was able to determine it was the unit. Reqested a replacement, got it, installed it, and then returned the unit just in case I needed a part. Return was quick and easy.
Some suggestions, tag the connectors in the electrical box, clearly identifing the installation date so you and others can tell when the units were installed. Before installing check the manufacture dates on the units themselves, do not accept older ones as the life of a unit is 10 years. While some people report receiving 1 to 2 year old units, mine were all only a few months old. Change the batteries once a year on a specific and rememberable date, such as the time change, of when you installed the unit.
The unts work well, as I was leaf blowing outside this weekend and the units were triggered by the exhaust because the windows were open in the house. Turned on the whole house fan and the unit went silent after a few minutes.
Can not beat the price November 5, 2008
We are a Plumbing and Heating company and it is required with most of our furnace installs to install these detectors.We purchased these combo C/O Smoke dectectors due to the price. We were paying about $15.00 more from our distributor for one of these, the same make and model. So the savings alone was worth it not to mention the product is of excellent quality. We install these with almost every furnace that we install.
smoke August 29, 2008
Got the smoke detector's quickly. I was updated from an older BRK model. Since the old ones were BRK, installation was very easy. They all seemed to work after testing a match underneath it.
Definitely an upgrade -- and a simple swap, too! July 16, 2008
4 out of 4 found this review helpful
Our house was wired for smoke detectors -- specifically the rather cheesy BRK 4120SB, which delights in false "low power" chirping. My goal was to replace the ones in the bedrooms with combination alarms that would alert us not only to smoke but to the presence of carbon monoxide. (Not to scare you but harm and even death from carbon monoxide poisoning are definite risks, especially in a home with deep-sleeping teenagers.)
I needed units that would be compatible with the wiring of our current system, and ideally ones that would accept the power leads, as wired. After some research here and elsewhere, I called the BRK help line and got definite information about the unit that would be compatible, as well as locations within the home where I both should and should not install units.
I ordered two units to start with, still being a bit leery of my previous experience, and can say that installation took less than 5 minutes per device.
1. Follow the instructions for removing the plastic tab in the battery door of your new unit and pushing the button to test your new unit. If all's well, proceed. Disregard the "locking pin" stuff unless you are in a shared dwelling and are concerned with someone walking off with your 9-volt battery. (This was the weirdest part of the instructions, frankly, and this is my guess on why it's there.) **Important: you are listening for 3 tones, pause, 3 tones, pause, 4 tones, pause, 4 tones. There is a typo at the bottom of page 3 of the instructions, so I've just verified with BRK that the tone pattern I'm mentioning is the correct one.
2. Twist off and unplug your current unit.
3. Back the two screws holding your collar to the ceiling so you have enough clearance to remove the collar.
4. Install the new collar.
5. Install your new unit. (A wired plug is included in case you need to swap your existing plug for the new plug.)
Fellow owners of the 4120SB will find that the upgraded unit sets and locks into place in the ceiling *much* easier and more reliably. Ditto with the battery door. Note that on the SC9120B, if you're having problems with the battery door not shutting (a) there is a little trigger tab that you should be able to push down with a fingernail and/or (b) hold the unit upside-down.
***A word, please, about longevity, since the primary purpose of an alarm is your safety.
1. Replace your batteries at least once a year.
2. Combo smoke/carbon monoxide units have a 5-year life span, per BRK staff. Regular smoke alarms have a 10-year lifespan. Not replacing them within these timespans is, in my opinion, the most dangerous kind of false economizing. (Note also that if you need help, the BRK customer service apparently has improved greatly since the experience of earlier reviewers of the product line. The call I made in June could not have been more thorough and professional, even to dealing with the phantom beeps of my 5-year-old alarms.)
3. Whether or not you buy this or any smoke alarm product, please do yourself and your family two favors. First, label the plug (hidden) side of your units with the install and replace dates. Second, change your batteries at least once a year.
BTW, I gave the unit a 4 rather than a 5 because while the battery door and twist-on/twist-off issues are less irritating than on the earlier generation, they still do exist.
 poor design - don't buy this product June 30, 2008
4 out of 9 found this review helpful
The BRK combination smoke and carbon monoxide alarm requires BOTH 110VAC AND 9VDC (Energizer type battery please) for proper operation.
You can use this alarm without the 110VAC if you like, but be prepared to replace the 9 volt battery every 3 weeks. If you use the device on 110VAC only, it will emit random false "low battery level" notices - loud beeps (in the middle of the night !). BRK (the manufacturer) denied the device had any issues at all and suggested I "properly follow the instructions" (which I enjoyed reading in the Spanish version included with my superior BRK alarm system). The product description (on Amazon) says: "9-volt battery backup for peace of mind during power outages". Right.
If you are into home improvement projects, then go ahead, make this purchase. You will have a chance to make your own 110VAC cable connection - no cable is supplied. You will also be challenged to find a way to fit this cable mess into the back of the device housing - there is no space there.
If, however, you intend to purchase a smoke alarm FOR peace of mind, try another product - and another brand.
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