Nest S3003LW 2nd Generation Smoke & Carbon Monoxide Alarm

Product Code: 8523H
Nest S3003LW 2nd Generation Smoke & Carbon Monoxide Alarm
Product Code: 8523H
Smart smoke and carbon monoxide alarm. Industrial-grade, split-spectrum sensor detects fast and slow-burning fires. Can be controlled from, and will send alerts to, a smartphone. Sensor lasts up to 10 years.


  • 85dB Alarm
  • Mains Electrical
  • 2 Year Manufacturer's Guarantee
  • Automatic Test Function
  • Override Function
  • Split-Spectrum Sensor
  • Smartphone Control
  • Battery Back-Up


€111.95 Incl. 20% VAT
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Additional Information
Technical Specification
  • Power Source : Mains Electrical
  • Brand : Nest
  • Product Type : 2nd Generation Smoke & Carbon Monoxide Alarm
  • Model Name : Protect
  • Fixings Supplied : Fixings and fittings supplied
  • Current Type : AC
  • Total Product Weight : 0.37 kg
  • Model No : S3003LW
  • Battery Type : AA
  • Colour : White
  • Pack Size : 1
  • Power Voltage Supply : 230 V
  • Manufacturer Guarantee : 2 Year Manufacturer's Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Nest Protect, backplate, 2 x AA batteries and fixings.
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

Click here to see information on our delivery charges and times



Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


Click here to see information on returns and cancellation

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Nest S3003LW 2nd Generation Smoke & Carbon Monoxide Alarm is rated 4.4 out of 5 by 252565.
Rated 5 out of 5 by from Excellent product Already got 2no 3rd gen nest thermostats installed, which work perfectly. These were recomended by the installer so thought I would give them a go. Installed 2no took about 30minutes to setup and install, work with out any problems. Night light is a really good idea, and as far as smoke alarms go they look smart as well. Ignore negative comments, you won`t regret buying any nest product!!
Date published: 2016-03-23
Rated 5 out of 5 by from Excellent Product I have been wanting one of these fro a while, but could not justify the cost, then the built in battery went on one of my existing units.... fantastic. Remember to connect the nest to your wi-fi, prior to installing, I was halfway through when I realised. It feels very solid and looks vey good quality. I do think they are expensive, so I only bought one so I'll see how it performs before committing to buying more. I already have hard wired alarms, so went for the same. I managed to fit this myself, I'm no electrician, the wiring was a bit confusing, not the nest but the existing wiring, so a quick check on line and it was up! It took a few attempts to get it to recognise my Wi-Fi and Nest Thermostat, I did the IT thing and switched it off/on, and bingo, but that could have been because I completed the test before realising that I should have connected first! I'm looking forward to being able to silence the alarm from the couch while the wife is cooking! (please don't tell her I said that!)
Date published: 2016-03-10
Rated 5 out of 5 by from NEST Fitted two of these, one in the kitchen and one at the top of the stairs. One was mains and the other battery operated and they both setup first time through my phone with no problem. I am going to get another for the bottom of the stairs. The features are excellent and I have not had a single problem with them, they work perfectly along side the thermostat. 5*
Date published: 2015-11-28
Rated 5 out of 5 by from Overall, very good I've purchased my second Nest protect now, and I would say don't be put off by the negative reviews. If you don't have WiFi in your house, these are not for you. Its clear on all of the literature - its needs a wifi connection for setup and ongoing checks. When it's disconnected from the internet or power it functions like any other fire alarm - and its loud, very loud. When its connected to the internet, its brilliant. You can check it remotely, test it remotely, see when the path light has been on (which is really bright on the 2nd Gen one). My first nest did malfunction one day, luckily whilst I was home. My phone started alarming telling me there was smoke upstairs, then suddenly the alarm begun talking and eventually started beeping - my dog thought it was the moment he had trained for. Suffice to say, the alarm had gone faulty. I have Nest a call - brand new alarm, no questions asked, arrived within a day. Couldn't fault the service.
Date published: 2015-11-28
Rated 1 out of 5 by from Avoid These are a nightmare. You need a very good internet signal THROUGHOUT the house otherwise you cannot link or connect them. Spent hours on the helpline to get the necessary help to set up after endless false alarms where I had to REMOVE the alarms to silence them. Also NOT suitable for kitchens as no heat sensors. I would never ever use a Nest product again. The guarantee is not worth the paper it is written on. Sorry to be so negative but you have been warned....
Date published: 2015-11-03
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