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Carbon Monoxide and Smoke Detector Buying Guide

NOVEMBER 08, 2023 | Home Care Buzz Experts | 7 minute read

First, what's the difference between smoke detectors and carbon monoxide alarms? Smoke detectors alert people to fire threats, while carbon monoxide detectors identify the presence of dangerous carbon monoxide gas. Both are crucial for home safety, so you'll want to choose the right ones for your home.

In this article, we'll explore everything you need to know about these essential devices, covering the various types and how to pick the best smoke alarms and carbon monoxide detectors for you. You'll learn which features to look for, as well as tips for installing and maintaining your device.

Types of Smoke Alarms

1. Ionization Detectors:

  • Benefits: These detectors are excellent at sensing fast-burning fires that produce little smoke. They use a tiny amount of radioactive material to ionize the air, allowing it to conduct electricity. If smoke enters the detector, it disrupts this flow, setting off the alarm.
  • Drawbacks: They are more prone to false alarms, especially near kitchens, because they're sensitive to small smoke particles.

2. Photoelectric Detectors:

  • Benefits: These detectors use a light source that gets reflected onto the sensor when smoke enters the unit, triggering the alarm. They are better at detecting slow, smoldering fires that generate a lot of smoke.
  • Drawbacks: They might not detect fast-burning fires as swiftly as ionization detectors.

The Best Smoke Detectors

A woman looking on as an electrician shows her how her new smoke alarm and carbon monoxide detector work.

These models have advanced features such as wireless connectivity, voice alerts, long battery life, and dual-sensor technology for detecting smoke and carbon monoxide. Choosing a smoke detector that suits your needs is essential, so consider factors like price, installation method, and additional features. Be sure to research and read customer reviews to find the best model for your home's safety.

1. Nest Protect Smoke Detector & Carbon Monoxide Sensor

The Nest Protect Smoke and CO Detector is a feature-packed device with exceptional functionality. The price is reasonable considering its advanced technology. You can hush the smoke detector beeping from your phone. It receives high ratings from users, and overall, the Nest Protect Smoke Detector is an excellent choice for anyone looking for a reliable smoke detector with smart features.

Features:

  • Voice alerts
  • Smartphone notifications
  • Split-spectrum sensor
  • 10-year lifespan
  • Senses both fast- and slow-burning fires
  • Lights up as you walk underneath it for nighttime safety
  • Recognizes steam as not smoke
  • Colored lights to show warning stages

Price: $119

Ratings: 4.6/5

2. First Alert BRK 3120B Smoke and Carbon Monoxide Alarm

The First Alert BRK 3120B is a smoke and carbon monoxide alarm designed to keep your home safe. It features dual-sensor technology and has an electrochemical CO sensor. Its loud siren and flashing lights will alert you to danger in your home quickly and effectively.

Features:

  • Dual-sensor technology
  • Electrochemical CO sensor
  • Loud siren and flashing lights
  • Battery backup

Price: $34

Ratings: 4.5/5

3. Kidde Battery Powered Smoke and Carbon Monoxide Detector

The Kidde Battery Powered Smoke and Carbon Monoxide Detector helps protect against both fire and silent, odorless carbon monoxide, and it's an essential safety device offering peace of mind and protection for households.

Features:

  • Digital display showing current carbon monoxide levels in parts per million (ppm)
  • Voice alert system
  • 10-year sealed lithium battery
  • 85-decibel alarm for clear alert
  • Comes with a mounting bracket

Price: $50

Ratings: 4.9/5

4. X-Sense Smoke and Carbon Monoxide Detector

The X-Sense XP02-WR is a smoke and carbon monoxide detector offering advanced safety features. Its wireless connectivity can easily integrate into your smart home system. It uses photoelectric technology to detect smoke and fire quickly and boasts a long-lasting battery life. Its compact design makes it easy to install in various locations, ensuring comprehensive coverage throughout your home.

Features:

  • Wireless connectivity
  • Photoelectric technology
  • Long-lasting battery life
  • Compact design
  • Voice alarm with location details
  • Helpful instructions for post-alarm actions
  • Voice reminders for low battery and maintenance needs
  • 10-year lifespan

Price: $35

Ratings: 4.4/5

Tips on Choosing the Best Smoke Detector for Your Home

Smoke rises towards the ceiling smoke detector.

When comparing the best smoke alarm models, it's essential to weigh multiple factors to ensure you make the right decision for your safety needs:

  1. Detection Technology: Choose detectors that can identify fast flaming and smoldering fires for comprehensive protection.
  2. Type of Fire: Consider what type of fire is most likely in the area you're protecting. For instance, using photoelectric detectors in kitchens may minimize false alarms.
  3. Power Source: Choose between continuous power offered by wired smoke detectors and the convenience during power outages provided by battery-operated units.
  4. Interconnectivity: Ensure all alarms in your home sound simultaneously by opting for interconnected alarms. It heightens alertness and responsiveness during emergencies.
  5. Features: Opt for advanced features based on your requirements:
    • Smart capabilities: Receive phone notifications or integrate with home automation systems.
    • Digital displays: See real-time data and carbon monoxide levels.
    • Hush buttons: Easily silence false alarms without disconnecting the device.

Selecting the best smoke detector hinges on your specific requirements and preferences. By keeping these tips in mind, you can make informed decisions that prioritize the safety of you and your loved ones.

Choose Where to Install a Smoke Alarm Detector

A woman on a ladder reaches up to install a smoke alarm on the ceiling at her home.

Where should you place fire detectors and carbon monoxide detectors in the house? You should install and maintain smoke alarms inside each bedroom, outside sleeping areas, and on every level. Mount the devices high on walls or ceilings. If on a wall, it should be no more than a foot from the ceiling. Keep them away from windows, doors, and air vents to prevent false alarms.

How to Install Smoke and Carbon Monoxide Detectors

A man changing the battery in a smoke detector.

Now that you know which smoke detector, carbon monoxide detector, or combo you need, it's time to install them. Be sure to follow the manufacturer's instructions for specific units, especially for hardwired detectors.

Installing a Battery-Operated Detector

Replacing or upgrading a battery-operated smoke detector or carbon monoxide detector is easy, especially if you use the same brand. The mounting plate usually will accept newer alarms from the same brand.

However, when switching to a different brand, the mounting brackets can differ. Follow these steps and the manufacturer's instructions for proper installation:

  1. Unbox and make sure you have the alarm, mounting plate, and the hardware needed.
  2. Select a drill bit slightly smaller than the anchors supplied, as the anchors need to fit snugly in the wall or ceiling.
  3. Hold the mounting base to mark the screw holes on the ceiling or wall.
  4. After you mark your spot, drill holes and tap the anchors into the drilled holes. You may need to lightly hammer in the anchors, depending on the size of the drill bit you used.
  5. Screw the supplied screws partially into the ceiling or wall, leaving the head of the screw up a little.
  6. Line up the mounting base with these screws and twist the alarm base into position under the heads of the screws.
  7. Tighten with a screwdriver until the base is secured against the wall or ceiling.
  8. Mount and lock the alarm onto the base by twisting it.

Quick tip: Some smoke detector battery compartments have tags in the battery cavity to prevent drainage before use. Make sure you pull the tag if your alarm has one.

Installing a Hardwired Detector

These wired smoke detectors and carbon monoxide detectors usually have a battery backup for extra protection in case the power goes out.

If you already have a hardwired alarm and are replacing it, staying with the same brand can make installation easier. Your new alarm may plug into the old, hardwired plug-in harness. Align the plug-in with the alarm and see if they connect. If not, a little wiring is needed to install the new plug-in harness.

  1. Turn off the power to the alarm area at your electrical breaker panel.
  2. Pull out the detector wiring system and remove any tape and the old plug-in by unscrewing the wire nut from the plug-in harness and electrical wires. Discard the old harness.
  3. Grab the supplied wire harness and connect the set of wires supplied with the alarm, making sure to match the same color harness wires (white to white, red to red).
  4. Wrap the wire connectors with electrical tape for extra protection. Tuck wires back through the mounting plate and into the electrical box, leaving the harness sticking out.
  5. Plug in the harness to your new detector and add a battery if applicable for your device.
  6. Twist and lock your alarm into place.
  7. Turn on the power. Check to see if the alarm's light is on and test your alarm. If the alarm does not sound, turn off the power at the breaker panel and double-check your connections. If the plug appears to connect, but the alarm's light won't come on, your unit could be defective, and you will need to exchange it.

Pro tip: To move or install carbon monoxide detectors and smoke alarm systems in your home is a big job. It requires knowledge of electrical systems and building codes. If you need to move this type of detector, it's best if you call an electrician to help.

Maintaining Your Smoke Alarms and Carbon Monoxide Detectors

A man maintaining his smoke and carbon monoxide detector at home, changing the battery.

  1. Testing: Test your detectors monthly using the test button.
  2. Battery Replacement: Replace batteries once a year unless it's a sealed model with a 10-year battery. Upgraded technology on newer models can send a low-battery alert to your phone, and some only need you to change the batteries every ten years.
  3. Replacement: Generally, replace smoke detectors every 10 years and carbon monoxide detectors every 7-10 years.

Invest in Home Warranty Coverage

Investing in quality detectors and understanding their proper maintenance is not just about safety regulations—it's about creating a protective shield around your home. In addition to getting the best detectors for your home, consider enhancing your home's protection with robust home warranty plans. Get your free home warranty quote today.

FAQs About Smoke and Carbon Monoxide Detectors

What are the best smoke detectors to get?

Take a look at our suggestions above for some of the best smoke detectors that are also carbon monoxide detectors. The best smoke alarm for you will vary based on your needs, the location, and your home setup.

Which type of smoke detector is best?

The best smoke detector depends on the type of fire you want to detect. Ionization detectors sense fast-flaming fires and photoelectric ones detect smoldering fires. For comprehensive safety, use a combination or dual-sensor smoke detector.

Is it better to have separate smoke and carbon monoxide detectors?

It is important to have both types of detectors installed in the right areas of your home to reduce the risks of fire and carbon monoxide poisoning. However, with the advancement of technology and smart home devices, a combination smoke and carbon monoxide detector is just as good as having two devices. It's up to you.


The contents of this article are provided for general guidance only. First American Home Warranty does not assume any responsibility for losses or damages as a result of using this information.

Home Care Buzz Experts
Home Care Buzz Experts

The First American Home Care Buzz team is made up of experienced home warranty writers and editors. Our team provides valuable insights and information to help homeowners like you meet the daily challenges of homeownership.  

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