Pros
Cons
This is the summary of consumer reviews for First Alert SC9120B Hardwire Combination Smoke/Carbon Monoxide Alarm with Battery Backup. The BoolPool rating for this product is Good, with 3.90 stars, and the price range is $33.42-$47.97.
The First Alert Hardwired combination smoke and carbon monoxide alarm, wires directly into your home's electrical system and the 9 volt battery backup ensures your safety even during power outages. This unit is equipped with ionization technology and an electro-mechanical sensor which is more effective at detecting flaming fires for comprehensive protection. It has separate visual and audible warnings for smoke and carbon monoxide detection. This device is microprocessor controlled for fewer nuisance or non-emergency alarms. This unit can be interconnected with up to 18 other compatible smoke alarms and 6 compatible devices like bells, horns, door closers etc. It is advised to place at least one Combo unit in hall ways or open areas by interconnecting it with smoke detectors in bedrooms for additional safety. The latching alarm indicator remembers which unit initiated an alarm. This device also features test and silence button to cease a non-threatening alarm or low-battery warning which allows testing the unit’s operation. The low battery chirp and missing battery tab alerts the need of a new power source. The battery door and mounting bracket lock system makes it tamper resistance and it backs itself with a 7 years limited warranty.
However, some common concerns from this unit are – chirps low battery or false alarms especially after battery replacement, some malfunctioned units failed to detect the CO levels where as testing them ensured they were functioning properly.
Overall, the First Alert Hardwired Combination Smoke and CO alarm with Battery Backup is a good device for smoke detection and protection from CO in your home. This combo unit is recommended for its reasonable price backed by its easy to use safety features.
Specifications:
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My property owner has replaced this model three times so far this year (2014). It goes thru batteries about every two weeks. Absolute garbage.