Nest Protect Wired 120V Smoke and Carbon Monoxide Alarm-S2001LW - The Home Depot


Model # S2001LW

Internet # 205374394

Store SKU # 1000385393

Protect Wired 120V Smoke and Carbon Monoxide Alarm

Nest Protect Wired 120V Smoke and Carbon Monoxide Alarm

This item has been discontinued.
The Home Depot no longer carries this specific product.

$99.00 / each
  • Unit speaks up to tell you if there’s smoke or CO
  • Connect unit to Wi-Fi to get phone alerts when alarm goes off
  • Works with the Wink home automation network


Model # S2001LW

Internet # 205374394

Store SKU # 1000385393

Know more, worry less. Nest Protect speaks up to tell you what the problem is and where it is. It will even message your phone when the alarm goes off or the batteries run low. And you can check on things at any time with the Nest app. Nest Protect can also see the carbon monoxide you can’t. Or if there’s only a little smoke from just burning the toast, it gives you a friendly Heads-Up. It also gives you peace of mind by testing itself constantly and showing you everything’s working with a quick green glow when you turn off the lights. Sweet dreams.

  • Know from anywhere - Connect Nest Protect to Wi-Fi and it will send a message to your phone if the alarm goes off or the batteries run low
  • Tells you what and where - It speaks up to tell you if there’s smoke or CO and tells you where the problem is so you know what to do
  • Nest Protect sees the CO you can’t - Carbon monoxide is odorless, invisible and deadly. When there’s CO, Nest Protect tells you where it’s hiding
  • Nightly Promise - Nest Protect tests its sensors constantly and lets you know they’re working with a quick green glow at night
  • Silence the chirp - Low-battery chirps ever rattle your dreams; Nest Protect shows you its batteries are good, before you doze off

  • This item is compatible with the Wink home automation system and can connect to several other items to control and customize your home with automated rules, shortcuts, & more, all with no monthly fees

Info & Guides

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Assembled Depth (in.)  1.63 in  Assembled Height (in.)  5.28 in 
Assembled Width (in.)  5.28 in 
Alarm Sensor Type  Photoelectric  Alarm Type  Carbon Monoxide,Heat,Smoke 
Alarm/Detector Features  Battery Back-Up,Escape Light,Hush Feature,Interconnected,Voice Alert,Wi-Fi Enabled  Commercial / Residential  Commercial / Residential 
Connected Home Protocol  Wi-Fi  Connector/Contact Type  2-Wire 
Electrical Product Type  Combination Detector  Hazardous Code  No Air 
Included  Batteries  Power Source  Hardwired 
Returnable  90-Day  Smart Device Enabled  Enabled 
Voltage (volts)  120 
Warranty / Certifications
Certifications and Listings  4-UL Certified 


Rated 4.2 out of 5 by 28 reviewers.
Rated 5.0 out of 5.0 by How can an alarm be fun and stylish? My state now requires a carbon monoxide detector outside of bedrooms, so I replaced my old wired-in smoke alarm with this new combination alarm from Nest. It's a beautiful product, starting with the packaging. It's boxed like a jewel - up to the included wire nuts and screws. It needs to be connected to the wireless internet before installing it since the QR code used to register it is on the back. It comes with batteries installed, so just pull the battery tab and it boots up. The instructions for connecting to home network are clear, but you have to follow them exactly since it involves setting up a temporary ad-hoc network. I had to retry 3 times to get it right, but it's easy to reset and start over. You do need an iThing or Android thing to read the QR code and register the alarm with your online Nest account. Physical installation was easy - there are only 2 wires to connect. The mounting bracket mounts with 2 screws, and the alarm twists onto the bracket. The mobile app or web browser can be used to control 3 options - the path light that illuminates at night when you walk under it, the "nightly promise" that blinks green circle when the lights go out to tell you everything's OK, and "heads-up", which gives you early voice warning of rising values before the alarm sounds. The path light is dim but lights an area of about 20' in all directions when it's dark. It's a white LED light. I would have preferred a redder color since bluish-white light in the middle of the night can disturb the sleep cycle, making you think it's morning. After trying it for a couple of nights I turned it off. The only other thing to note is that after I installed and tested it, the on-line status showed "power failure". There's a faint green dot that shows that AC power is on, so I didn't understand why it thought the power was out. It took more than an hour to realize that the power really was on. August 26, 2014
Rated 5.0 out of 5.0 by I love this alarm, since my pets are alone all day, I can check on my home via my mobile. This alarm was very easy to install with an existing wired connection from my old alarm. The instructions were very easy to follow. I made the mistake of waiting too long to push the button for "English" during the initial set-up so everything ended up being in Spanish. It was no big deal, I just had to reset it as there is no other way to change the language option. The connection didn't work at first on one of my Smartphones, but it did after trying a few times. I think it was having trouble with the NEST Wi-Fi connection. Settings are easy to switch on and off via the NEST app you download on your phone. I like the green light that comes on when I turn off the hallway light, it's a sign that everything is working like it's supposed to be working. It also has a night light that turns on when you walk below it and the room is dark. It's not as bright as a regular night light, so it doesn't really light up your way while walking in the dark. The best feature that I haven’t seen in other alarms is the “Heads-up”. It warns you when smoke or carbon monoxide levels are rising, and the alarm is not as loud. I like the design, it’s not only functional but it’s also very stylish. September 2, 2014
Rated 4.0 out of 5.0 by "Good" if you have the money for fancy smoke alarms Pros: Nest Protect talks and provides detailed alarm information The app is user friendly and works together with nest thermostats. The unit seems to be detect different levels of alarms. Alarms due to actual fire detected can not be hushed. Cons: I would need to replace every smoke alarm in my house since a Nest will not network with other thermostats via the third wire in my home. Nest does not work with my alarm system. The unit has had a false alarm at least once so far. Summary: After finding out that these alarms do not work with the seemingly standard smoke alarm interface my alarm system uses I do not plan on upgrading my home. September 21, 2014
Rated 1.0 out of 5.0 by I really wanted to love these but......... This a great idea for a product and these things look good and will do everything that they are advertised to and one thing more, false alarms. I have both the wired and battery powered versions of these things and they both have the same problem, false alarms. They will go off randomly for no reason at all. If you are there when it happens, you can't hush them up with out disassembling them an removing the battery. But the real fun is when your not home and you get a notification from your nest that there is "Smoke in the living room". Now what? I've had the joy of calling the fire department and having them break down my door, only to find that there was nothing wrong except for the Nest. They were not happy. I've tried to get help by calling the customer service line on at least three occasions. They promised to send out replacement units but never did. A check on the internet confirmed that I am far from alone with this problem. I really love this idea, but the false alarms make them unreliable. November 7, 2014
Rated 5.0 out of 5.0 by good device I like it fine. I bought the protect when it was $129. It has a lot of features, i'm sure I will buy another one now that they are just $50 more then a regular detector with voice. The night light is a cool feature and the ability to get the alerts on your phone is also cool. I would like the night light to be blue, I would like to change the voice to an english accent or to arnolds voice, "Get out!" It communicates with the thermostat so that nice also. August 15, 2014
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