Customer Ratings & Reviews

I received this offer from First Alert – The SC5 smoke and carbon dioxide detector. This was a direct replacement for my Google Nest Protect as my protect was 10 years old and the Nest Protect is no longer being made. This product can be found on the Google store website and is stated to be the nest Ptotect’s successor. As such, it is stated to work with the Nest Ptotect mounting bracket and states that it comes with a direct connect adapter to the First Alert SC5. Install – COULD NOT HAVE BEEN EASIER!!! I removed the old Nest Protect and unhooked it from the power. I then used the included adapter specific to the Nest Protect wiring harness and a simple plug and play to this harness took 2 seconds. I then connected the included adapter to the detector unit and attached to the old Nest Protect mounting bracket. Total install time – 60 seconds as long as you are replacing Nest Protect to First Alert. I did not need to turn off the power to the area as this was a plug and play adapter to harness – no touching of wires. In case you are not replacing a Nest Protect, there is an included wiring harness with wiring nuts and of course the mounting bracket. Connecting the device to the First Alert by Resideo app took approximately 2 minutes including connecting to wifi and setting up link to Google Home. Total Install time 3 minutes. I ran a system test and it runs though both tests – smoke and CO. Please note the alarms are quite loud. After verifying the unit was operating properly, I made sure the Google Home integration was operational – and it worked flawlessly. My only con of this device is it does not have the motion sensor to light your pathway when in the dark (the Nest Protect had this feature and it was very handy in the dark). The First Alert website product page states this may be added in future renditions so I am guessing lots of owners liked this feature of the Nest Protect – including me). Being touted as a replacement for the Nest Protect, and coming in at it a premium price compared to other products available, this feature should have been included. All in all – good product

I have eight Nest Protect smoke/CO detectors that have served me well. The oldest one is about 8-years old. They expire after 10 years. Unfortunately, the Nest Protects have been discontinued and the First Alert SC5 is the official replacement. So, I replaced my oldest Nest Protect with the First Alert SC. It was pretty seamless exchange. The First Alert and the Nest Protect ceiling mounts are the same, and the First Alert comes with a wiring adapter harness that connects your existing Nest Protect wiring to the plug on the First Alert. The First Alert looks good and seems well made. You will need to download the First Alert app and create an account to connect to the smoke/CO detector. You can then link the detector to the Google Home App, so that it is synced with your other Nest Protects, but it will not show up in the Nest app. It does not have the Pathway light that the Nest Protect has. It seems to be a good functional replacement for the Nest Protect, but with the missing Pathway light and not showing up with the other Nest Protects in the Nest app, it is a slight downgrade to what was given with the Nest Protect, so I’d give it 4 out of 5 stars.

We have 3 Nest Protects in our house and have loved the ability to control and monitor them from our phones, along with the interconnected nature of the devices. With Nest shutting down that division, First Alert appears to have picked up the slack and has built a device that mirrors the older Protects and will end up being the perfect replacement when those old ones hit the end of their life. Installation and setup were a breeze with the included wiring and bracket. I would appreciate being able to control the device through the Google app, but First Alert's app is very user friendly and intuitive. Fortunately we haven't had any incidents that have set it off, but on testing it is loud and you will get alerts on your devices. Overall, I'm very happy that First Alert, one of the most recognizable names in smoke detectors, is the one carrying this flag for a smart device. It's well built, well thought out and easy to install and use. Being able to monitor remotely gives additional piece of mind and the ability to call for help if something happens when you're not at home. You can't put a price on being able to save a family member or pet. I would absolutely recommend this to anyone looking to replace a hardwired detector!

It’s getting time to replace my Google Nest Protect detectors. The First Alert SC5 is touted as the replacement for my Nest Protect model. While this model fits into the mounting brackets and wiring. It does not have all the same features the Google Nest. Initial setup via the First Alert app went without any problems. To utilize smart features requires the installation of the application found at resideo.com.us.en/first-alert-app/. This means that if you are looking for a plug and play detector this is not it. What is up with that annoying green light that is constantly on. It suits no real purpose, with the application all it needs to do is send a notification to your phone that it lost power. For that purpose, I could not install this in the bedroom, the light kept me awake. During testing I found the quality of the voice playback to be lacking. From a distance it is hard to understand what is being said. The loss of the path light feature is a real setback. As I was adding this detector to my existing network I found that my nest application does not support the SC5, however once installed it works properly if you test the Nest Protect the SC5 will also go off and visa versa. Keep in mind that the Google Nest protect is no longer available.

I recently upgraded my home safety system by installing the First Alert SC5 Hardwire Smart Smoke & Carbon Monoxide Alarm, and I couldn't be happier with my choice. I wanted something that would not only keep my family safe but also integrate seamlessly with my existing Google Nest smart home system. One of the standout features for me is the ability to receive alerts on my phone, whether I'm at home or away. It's a comforting thought knowing that if smoke or carbon monoxide is detected, I’ll be notified immediately. Of course, I hope I never have to test this feature, but it’s reassuring to know it’s there. Installation was a breeze thanks to the Quick Connect plug. I didn't have to worry about complicated rewiring, which was a huge plus for me. The hardwire interconnect feature is also great because it means that if one alarm goes off, all compatible alarms will sound. This gives me peace of mind, especially when I have guests over or when the kids are sleeping. I also appreciate the voice alerts that tell me the type and location of the danger. It’s much better than just a beeping sound; it feels more informative and less panic-inducing. Plus, having a 2-in-1 protection system for both smoke/fire and carbon monoxide is a huge advantage. No need for separate alarms, which is truly cost-saving. Another feature that I find comforting is the battery backup. Living in an area where power outages can happen all of a sudden, it’s nice to know that we’ll still be protected even if the lights go out. Before this, I had a simple 'plug-and-play' alarm from a different brand, but I wanted to upgrade to something smarter and more reliable. The First Alert SC5 fits the bill perfectly. Overall, I feel more secure in my home, and I would definitely recommend this alarm to anyone looking to enhance their fire safety measures.

I got this unit to replace my current unit that was 19 years old. What I particularly like about this unit is the combined smoke/CO2 detection. The smart feature is nice, but not necessary. Knowing that a detector has an advertised 10 year lifespan, I got this unit to replace an existing unit. As a hardwired unit, the installation is straight forward. Twisting off the old unit, unplugging it, removing the old mounting ring, and disconnecting the wiring was easy. The installation of this unit's own mounting ring, connecting the wiring to this new unit, and installing the new mounting ring was similarly easy. The wiring harness snaps onto the unit and the unit then easily twists on to the mounting ring. Once powered on, the voice prompt gave instruction to connect the mobile app. That was easy enough to locate, download, and configure the mobile app. Adding this device within the mobile app was familiar - it was very similar to adding devices via other apps (click the add button, scan the QR code on the side of the detector, following prompts). I like the idea of this being network-connected - to get alerts for smoke or CO2. I guess this provides a bit more peace of mind. I'm sold on this unit, so now I'll buy a second unit to replace the remaining dated unit - and to interconnect the two smoke + CO2 detectors together.

I have a hardwired smoke and carbon monoxide alarm system in my house, but it doesn’t connect to any kind of monitoring system and there’s no way for me to know if they are going off if I’m not at home. This solves that! It hardwires directly into my existing system (I didn’t need any other cables) and then connects to my wifi. Setup took only a couple minutes and I connected the app with my google home ecosystem to receive alerts. I tested it with my other first alert smoke and carbon monoxide detectors and they both communicate with each other when an alarm signal goes out. There is a big button in the middle for testing and silencing alarms and a clear LED indicator to easily see that the system is online and functioning properly. My only nit is that it doesn’t mount super flush to the wall so there’s a clear half inch gap above it where you can see the mounting hardware. My other first alert alarms have a much smoother transition piece so I don’t know why something wasn’t included here.

I've used First Alert products for over 20 years. I've also used other "smart" smoke and carbon monoxide detectors (such a Nest) over the last several years. We moved into a 17 year-old home where the smoke and carbon monoxide detectors were "old school" devices using 9 volt batteries. It was time to replace them so we went with First Alert. I had to install the new mounting bracket as the old brackets couldn't be used with the new device. That only took about 5 minutes to do it properly by ensuring the bracket was secure on the ceiling. The rest of the installation was pretty simple. One of the benefits of this device is that it is compatible with the Nest and Google Home apps. I didn't want another one-off smart home app so I was able to complete the setup on my Google Home app. The Google Home app is far from perfect but I use it for my Nest Thermostats, doorbell and video cameras. Once I connected the wiring harness it was simple to add the device to my Google Home app. I wanted the hard-wired version as I have used battery-operated smart home detectors in the past. These need constant monitoring for battery health. For now, I am very pleased with the First Alert device. Time will tell in the next couple years if it holds up for a longer period of time.

The set up was straight foward and easy, bought it to replace my nest