FIRST ALERT BRK SC7010B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 3-Pack

Almost a year ago now, I ripped out all of the smoke and CO detectors in my house. I replaced them all with hard-wired detectors during a home remodel in accordance with NFPA guidelines (e.g. one in every sleeping quarter, gathering area, outside the door of every sleeping area, bottom/top of every stair, etc). The hard part was crawling around in unfinished areas of the house to run wire everywhere: once I had 12/3 NM-B in every ceiling box, wiring up these detectors was quick and easy.Each detector has a base that screws onto the junction box. It is a plastic flange that covers a quarter inch or so around the box, helping to mask the edges of the paint job or any irregularities in the drywall cutting. The wire hardness snaps into the detector, which then twists onto the flange. It comes with a label where you can write the data of install for future reference. It looks great compared to your Home Depot special, where you are lucky to get more than two that are compatible with each other.So far I have had zero false alarms after 8+ months of being installed. They have done better than the old ones that nuisance tripped by frying bacon - and the new ones are installed close to the old ones. Hitting the test button, they all go off within a second or two and are LOUD. They could wake the dead, which is important because I may as well be dead when I am sleeping. A train could smash its way through the house and I would not wake up. These things are loud enough to make my ears hurt more than a rock concert. I have burned a few candles near them and they have not triggered, but have not tried with actual fires, e.g. burning a 2x4 close by.It seems like smoke detectors have gone downhill lately, but these seem to work well enough based on my own observation and on other reviews.

The FIRST ALERT BRK SC7010B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup units were easy to install. I have ordered additional units to replace all of my hardwired smoke detectors so that they will also detect Carbon Monoxide,

Use these in our home they last about 10 years before they bonkers. We really like the brand they are reliable.

Easy install

The product showed up ready to install with batteries already in the detector with an easily removed piece of tape on the contacts. Very easy to deal with.

Just received two of these today, but I had to return one unit. Defective unit came in a box which had been taped on one end and the batteries were missing. Unit did not indicate that it was receiving A/C power (hardwired) when checking the green light on the face of the unit, although it was receiving battery power. Removed batteries, unit would not operate in any capacity at that point. Removed wire nuts to make sure wiring harness was making contact with existing wire in electrical box, looked to be in good order. Switched mounting locations to confirm that it was indeed an issue with the unit and not the power source or harness, but it still didn't work. Other unit was fine. Submitted return ticket with Amazon and I am confident it will be resolved quickly.Units were replacements for 18 year old ionization models. Changed mounting bracket and wiring harness easily. Units mounted easier to the installation brackets than older Firex units that they were replacing. Glanced at instruction and they seemed to be straight forward and easy to follow which would be a plus for anyone with limited electrical knowledge. Units came with dust covers which I thought was an excellent idea in case you are remodeling or this is going in new construction. This combination smoke and carbon monoxide alarm has two distinct alarms depending on which event is triggering the alarm. Battery access was simple, so changing out batteries would be a piece of cake. Definitely easier to access than the Firex models they replaced.Overall, I really liked this particular First Alert combination alarm. I will upgrade score depending on how the situation with the defective unit is handled.Update 8/27/2018: Went from 4 star to 5 star rating. Return/swap of defective unit was handled quickly and all units that were purchased have been operating perfectly.

The items arrived very promptly - within two days. They are exactly what I ordered.

Seemed ok, well until it sets off every one of these interlinked alarms at ungodly hours for no apparent reason, i.e. no fire, no carbon monoxide. You can't work out which one has triggered and worse, you can’t even then shut them off except by ripping them down and pulling out the battery !So I either have a hairtrigger false fire alarm system, or I disable the whole contraption (not a good idea).Will dump the whole system if it sets every alarm off for no reason again and get something simpler that works.One suggestion was to vacuum them all (regularly) - will try that vs throwing out 8 alarms.Update: vacuuming them seemed have work but only for a month.Life span of units before it complains are also a bit random though.Update - Sadly they seem to just randomly beep and then be silent, or suddenly (even with) new batteries sound the FULL ALARM ~5 times in the early hours of the morning for not apparent reason.i.e. not ideal, in fact I'm replacing them with another make (NEST) as these keep going off FULL BLAST in the early morning hours, even with relatively new units - COMPLETE JUNK.And the manufactures really don't care.