7 Best Wired Smoke Detectors

A smoke detector is one of the essential safety equipment items for your home and family safety. Its significance may not be gauged in ordinary circumstances but when a smoke or fire accident incurs, it reduces the risk of life and material loss.

Finding the right smoke detector can certainly be a confusing task. Some smoke detectors are easy to install and cheap in price but come with basic features. The more expensive ones are comprehensive in operation, have add-on features and appear to be heavy on buyer’s pocket. With our extensive research, we list below some of the best home detectors that ensure the full-proof safety of your loved ones.

How to Install a Wired Smoke Detector

It might be a bit tricky to install a wired smoke detector, it takes skills and knowledge about how electricity and wiring work.

If you’re completely new at this, you should seriously consider hiring a professional to do the job.

The ideal location for wired detectors is around a foot underneath the ceiling. The box for the device shouldn’t be on a wall stud, so make sure to avoid these. Once you have a clear space, mark the place where you’re going to install the box and cut holes there. You should have an electric panel or a fuse box nearby in order to pull the required wires over.

After installing the box, you have to pull over the required ground wires from the fuse box to your alarm system. Each connection of the wires should be firmly fastened with a wire nut. You would need to plug in the three prongs of your smoke detector somewhere as well.

Once you’ve made all the connections and mounted the wall bracket as well, turn on the detector’s circuit and test the device. This could be done using the test button, which should emit an alarm if pressed for a few seconds.

What to Look For in Wired Smoke Detectors

When you’re on the lookout for the best wired smoke detectors, there are a few factors to consider. Since these are going to be an almost permanent fixture in your house, it helps if you look at the following aspects before finalizing you choice:

The Power Source

Wired alarms require a professional level of installation. For this, they need a proper source of energy in your house. This is then connected to the other alarms around the house, making sure they all go off when there’s a threatened problem. Hence, make sure you have at least one fuse box or electronic panel to devote to your wired smoke alarm.


Your wired smoke detector should ideally be able to link to other devices. These could be other smoke detectors or CO detectors as well. If one gets triggered, all the alarms should go of. This alarm system is one of the safest options to date. Hence, make sure you have such a connection, especially if you live in a medium to large house.

A Silence Button

Smoke detector alarms can be useful, but also quite annoying. They could even damage your hearing if you stand too close. You can always disable the alarm by taking the batteries out, but this is a risky option if you forget to re-install them. A silence button is hence the best option to have.

Light Alarms

If you or a family member is hard of hearing in any way, a flashing light should be part of your smoke detector. Even if there are no hearing issues, a light can sometimes attract attention where sound fails. In order to have an extra safety feature, you can also go for a detector that lights up when it’s dark.

Digital CO display

It’s best if your smoke detector also acts as a CO detector. This could be a vital part of your home safety system. Having the CO levels displayed digitally has several advantages, especially if you’re going to be away for some time. You should be able to see the high and lows that you’re being subjected to every day, as well as stay informed of any irregularities during your absence.

Where to Buy
First Alert BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup
Firex Hardwired Smoke Alarm I4618
Universal Security Instruments Hardwired Ionization Smoke and Fire Alarm with Battery Backup, Model MI106
Kiddie  i12040 Hardwire  Smoke Alarm with Hush Feature  and Battery Backup
Inter Connectable Smoke Alarm with Battery Backup
Kidde - 21006407 AC Hardwired Operated Carbon Monoxide Detector Alarm with Digital Display | Model KN-COP-IC
Google S3003LWES Nest Protect Alarm-Smoke Carbon Monoxide Detector

1. First Alert BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup

Installing this top-notch 9120 series of high wired smoke alarm in your home can perhaps be one of the best choices to make in terms of smoke detection and fire accidents. Having a 10- year warranty and weighing up to 0.8 ounces, the detector comprises of tamper-resistant locker pins, operates at 120 volts Ac power and is also provided with a backup battery. Thus, the issue of power outrage or no electricity can be easily solved by the use of the battery backup. Similarly, the alignment of this detector can be easily sorted using a gasket-less mount. The ionizing sensor also helps in sensing flame fires that in turn ingest explosive flames.

One of the most celebrated factors of this product is its insolent technology of not producing unnecessary noise. It also includes a single test/silence button from which you can test the unit’s functionality and at the same time, silence the non-threatening alarm and low battery warning.


  • Easy to set-up and swap out
  • Can connect with your other hardwire smoke detectors
  • Comes with a dust cover to protect the unit


  • Users complain that the manual is not detailed and contains incomplete information
  • The battery door isn’t easy to open

2. Firex Hardwired Smoke Alarm I4618

In terms of having excellent mechanism and functionality, Kidde’s Firex Hardwired smoke alarm is also one of the best smoke detectors. To begin with, the product has the advantage of easy installation where without removing the mounting bracket from the alarm, the front battery pull tab allows for the detector’s instigation. The minting is further made easier with more surface area in terms of a mounting base that also keeps the surface clean; preventing any sort of scratches of the paint from being scrapped off. This product is also provided with the tamper resistant lock features that help prevent the theft of alarm.

Kidde’s Firex Hardwired smoke alarm offers user-friendly features such as the provision of a hush alarm control button. The front-loading battery door is another commendable feature of this product and a battery backup is also provided; adding to the idealistic functionality of the product. The alarm is also inter-connectable with as many as 24 devices; tinned strands for amplified conductivity, wire nut grip and an alarm that has memory flashes.


  • Fairly expensive than other brands
  • Made with hard and durable plastic that doesn’t break off easily
  • Uses extremely sensitive ionization sensors
  • Features a low-battery indicator light


  • The wiring harness does not match with old Firex smoke detectors
  • Users complain that the re-mounting and re-wiring is time-consuming

3. Universal Security Instruments Hardwired Ionization Smoke and Fire Alarm with Battery Backup, Model MI106

This is an effective smoke detector that has a dual ionization-sensing chamber to ensure a quick response right at the outset of fire. It is fully inter-connectable with around 24 USI and universal combat devices that further add to its proficiency. The installation of this product is also very easy and maintenance isn’t very time consuming or costly. The detector also has a front-loaded battery drawer that can perhaps make the battery installation and removal quite feasible.

It is associated with the Patented Quick find alarm origination that helps in identifying the first alarm to ring within an interconnected system.  The USI Electric MI106 also includes a tamper-resistant lock feature and this item is backed with a 10-year limited warranty. 


  • Comes a tamper-resistant feature
  • Includes an alternative battery pack
  • Dual inonozation sensor
  • Allows interconnectivity with 24 alarms


  • Poor battery life
  • Incompatible bases and wiring harness that don’t replace so easily

4. Kiddie  i12040 Hardwire  Smoke Alarm with Hush Feature  and Battery Backup

Kiddie i12040 is an advanced smoke alarm that is equipped with the unique ‘Hush Feature’. The said feature makes it possible for the smoke detector to silence nuisance alarms temporarily. This is designed compact but with increased performance and its integrity is always guarded with a ‘one-touch button’ mechanism of testing the entire alarm’s electronic circuitry. You are guaranteed full protection with this smoke alarm even when there’s a sudden power outage because it has a 24/7 standby battery power backup. Nothing to worry about the safety because this product passed all the requirements set by the Underwriters Laboratories (UL)- a world-renowned, independent facility that checks products for compliance with the international safety standards. This world-class smoke alarm is backed by a 10-year warranty.


  • Convenient interconnectivity with other detectors
  • Serves as a quick, direct fit replacement
  • Model is easy to install as per the instruction manual


  • With an ionization sensor, it may buzz when there is cooking smoke
  • Appears to be expensive than other brands
  • The batteries used don’t last long

5. Inter Connectable Smoke Alarm with Battery Backup

This is one of the most trusted ionization, hardwired smoke alarms in the market today. It’s easy to install and replacing your old alarms with this one will be done in no time. You will find three wired alarm systems in this item: one white wire, one orange, and the last one come in black color. Get non-stop security against fire with this smoke alarm because reliable batteries backed up its power. Included in the package is a comprehensive guide that will help you in using this smoke alarm right from the get-go especially if you don’t have any idea how to hook this item to your old wiring. You can also find in the manual the detailed answers to the most frequently asked questions about smoke alarm systems.


  • Easily hook to old wiring
  • Secured packaging and comprehensive manual
  • The battery is not big
  • Easy-to-install


  • Comes in bright white colour, which may not fit beige and pearl white ceilings
  • Customer service isn’t very friendly and helpful

6. Kidde – 21006407 AC Hardwired Operated Carbon Monoxide Detector Alarm with Digital Display | Model KN-COP-IC

This hardwired carbon monoxide alarm contributes to an overall safer environment in your home. It is equipped with a battery pull tab that eliminates hassle in installing the batteries and this also keeps the battery protected and always fresh.

Kidde – 21006407 is an advanced carbon monoxide detector and it is capable of recording and displaying the peak recorded CO concentration since the last reset of the alarm. Tampering or altering its function will not happen to this CO detector because it is built surrounded by tamper-resistant locking pins.

Standards-wise you will not ask for more because no less than the world-renowned Underwriters Laboratories (UL)- an independent facility taking charge of testing various products from different parts of the world whether they strictly follow the international safety and quality product standards, recommend this product.


  • Less hassle installation thanks to its battery pull tab feature
  • Perfect alignment of the alarm is not impossible courtesy of its adjustable mounting bracket
  • Ready to be installed on any standard single gang electrical box (good for up to 4-inch octagon junction box).
  • It has a built-in test/rest button capable of testing the proper operation of the detector as well as resetting the Carbon Monoxide alarm with respect to your preference
  • Digital Display
  • Comes with battery backup power for seamless protection


  • Relatively more expensive than other smoke detectors available


7. Google S3003LWES Nest Protect Alarm-Smoke Carbon Monoxide Detector

A smart smoke and carbon monoxide detector that will speak directly in a friendly voice to give you an early warning right at the onset of the occurrence of smoke in your home. Unlike other detectors that send a generalized alarm, this one is equipped with a feature that will tell you where exactly the danger is and what type of impending danger (nature and phase of fire) is present in your home- could be from smoldering fires or fast-burning fires. You can also use your phone to receive warnings and monitor the status of your home even if you’re out.

If you deem the smoke is too little and not dangerous at all, you can easily activate its App Silence function to hush the smoke alarm and you can continue doing your normal routine. You can find this function in the Nest application. This smoke and carbon monoxide sensor has a 10-year proven working lifespan.



  • Can detect several kinds of fires and differentiate between them and normal cooking smoke
  • Can be silenced and otherwise monitored through an app


  • Price is steeper than other similar devices on the market


All in all, these smoke detectors listed are perhaps not only known for their efficiency and quality but the brands of these products are also known and shipped worldwide. The fact that all of the listed products have more or less the same features provides more choices for the buyer. When there isn’t any compromise on taking preventive measures to save yours and your loved one’s lives, why take the risk of not having a smoke detector, especially when they are so useful, efficient and pocket friendly.