Reddit reviews First Alert BRK9120b6CP Hardwired Smoke Detector with Backup Battery
We found 3 Reddit comments about First Alert BRK9120b6CP Hardwired Smoke Detector with Backup Battery. Here are the top ones, ranked by their Reddit score.
Keep your family safe with this hardwired smoke alarm the battery backup means constant monitoring, even if there's a power failureEquipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarmTo ensure complete protection make sure to place one on each level of your home and in each bedroomCan connect to other compatible BRK or first alert smoke detectors, to ensure all alarms will sound when smoke is detectedSimple to use, with a single test/silence button, and side load battery compartment tamper resistant locking brackets and universal mounting brackets make installation easyRigorously tested to meet UL standards120 volt AC power with 9V battery backup to keep alarm functioning during power outageFirst Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
The most direct same-brand replacement for what you have is the First Alert 9120b -- it looks like a 12-pack is $110 with shipping.
Many locales now want you to have photoelectric or dual-detection photoelectric & ionization detectors, so you may wish to pick up one or more of that sort in the same brand for each floor.
$10 gets you a smoke alarm with a silence button.
Hardwired smoke detector: $11
https://www.amazon.com/First-Alert-9120B-Hardwired-Battery/dp/B00O8MVW3U/ref=sr_1_7?s=hi&ie=UTF8&qid=1468794096&sr=1-7&keywords=smoke+detector
Cut-off relay that trips when smoke detector goes off: $15.52
https://www.amazon.com/BRK-Brands-RM4-Smart-Relay/dp/B0039PF21U/ref=sr_1_10?s=hi&ie=UTF8&qid=1468794161&sr=1-10&keywords=smoke+detector+relay
For less than $30 you can have a printer mounted smoke detector that will kick the printer power off in the event of smoke. While pretty far from UL compliant, I used an old serial cable for power and relay connections to the smoke detector then wired the relay to the mains going to the power supply. If you don't want to hard wire it into the power supply, optionally build it into a junction box or whatever. In the majority of cases there's more than enough smoke to set off the detector well before actual flames. Once the smoke detector stops sensing smoke the relay will kick the power back on but the printer will have been power cycled so all should be good other than the damage caused by the runaway to your heater element.