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Combination Smoke & Carbon Monoxide Alarms

(27 products)

Install on every level, every bedroom

2-in-1 combination smoke and carbon monoxide alarms detect both types of danger. First Alert offers 10-year sealed battery, battery and hardwired options with features like interconnect, so when one sounds all sound. Combo alarms can also include voice and location alerts and more to provide reliable detection.



First Alert 2-in-1 Combination Smoke & Carbon Monoxide Alarms

First Alert combination smoke and carbon monoxide (CO) alarms offer 2-in-1 protection from both types of danger with a variety of feature offerings to deliver advanced and reliable fire protection to help protect your home and family.

  • Precision Detection Combination Alarms Meet New Standards

    Precision Detection advanced sensing technology meets the latest industry standards to reduce cooking nuisance alarms and detect smoke from synthetic materials to help provide an early warning.

  • 10-Year Sealed Battery Combination Alarms

    10-year sealed battery alarms eliminate the need for battery replacements and late-night low battery chirps for the life of the detector.

  • Hardwire Combination Alarms

    Most hardwire alarms contain a hardwire adapter plug that makes installing the combo detector easy and eliminates the need to rewire. For protection during power outages, the device offers a back-up battery feature for continuous smoke and CO detection.

  • Battery-Operated Combination Alarms

    Battery-operated detectors are easy and convenient to install throughout your home for additional protection.

Browse Precision Detection 2-in-1 Combination Smoke & CO Alarms

Alarms can have a variety of different features for added safety and simpler maintenance. First Alert Precision Detection alarms are available at three different levels of protection based on the alarm features to meet your home and family’s needs:

  • Standard alarms contain basic features such as easy installation.
  • Superior alarms contain many safety features such as 10-year battery and voice alerts.
  • Premium alarms contain the most safety features such as 10-year battery, voice alerts and wireless interconnect.

FAQs

How often should I replace a combination smoke and carbon monoxide alarm?

Most combination smoke and carbon monoxide alarms should be replaced at least every 10 years. Check the manufacturer’s date on the back of the alarm and if it’s 10 years old or older, it’s time to replace.

What is a combination smoke and carbon monoxide alarm, and how does it work?

A combination 2-in-1 alarm detects both fire and carbon monoxide in a single device offering a convenient solution that also saves wall space. It uses sensors to monitor fire-related smoke particles and dangerous levels of carbon monoxide gas to alert you and provide an early warning to help you escape safely.

Where should I install combination smoke and CO alarms in my home?

Install combination alarms on every level of your home, including the basement. Place them inside each bedroom, outside sleeping areas, and near attached garages for whole home detection. Combination smoke and CO alarms can be installed high on the wall or in the middle of the ceiling.

How long do combination smoke and carbon monoxide alarms last?

These alarms need to be replaced at least every 10 years. Many models have built-in end-of-life indicators that alert you when it’s time to replace the unit. Regular testing can also help ensure your alarm is functioning properly and identify if the alarm needs to be replaced.

Can combination alarms be interconnected with other alarms in my home?

Yes, many combination alarms can be interconnected with other compatible smoke, CO, or combination units either wirelessly or wired depending on the model. This allows all alarms to sound at once if one detects a threat, enhancing whole-home detection —especially useful in large homes or multi-story layouts.

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