10 Best Interconnected Smoke Alarms 2025 in the United States

The First Alert SMICO100-AC is a 3-pack of smoke and carbon monoxide alarms designed to offer reliable, interconnected home safety. One of its strong points is the interconnectivity feature: when one alarm detects danger, all the alarms sound, providing a quick alert throughout your home. It uses ionization sensors, which are good at detecting fast-flaming fires, and the Precision Detection technology helps reduce false alarms from cooking, which many users will appreciate.

Powered by corded electric with a battery backup, these alarms stay active even during power outages, adding peace of mind. Installation is made simpler with the Quick Connect Plug, so you don't need to do complex rewiring, making it a good choice for users who want straightforward setup. The test/silence button also helps with easy maintenance by letting you check the alarm’s function or silence it without hassle.

A limitation is that ionization sensors are less sensitive to slow-smoldering fires compared to photoelectric sensors, so it might miss certain types of smoke. The alarms don’t include advanced smart features like smartphone alerts or voice control, which some newer models offer. They also require regular battery replacement for the backup function, so some upkeep is necessary. This pack suits homeowners looking for dependable, easy-to-install alarms with solid interconnectivity and dual smoke and CO detection, without needing extra smart capabilities.

The X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector is a solid choice for those seeking comprehensive safety solutions in their homes. One of its standout features is the interconnected system; when one unit detects smoke or carbon monoxide (CO), all alarms in the network sound off, ensuring that you receive timely warnings no matter where you are in the house. This is particularly beneficial for larger homes, as you can connect up to 24 devices, creating a wide coverage area. Each unit is equipped with both a photoelectric smoke sensor and an electrochemical CO sensor, providing reliable detection for both hazards.

Another advantage is the built-in 10-year lithium battery, which means you won't have to worry about changing batteries regularly. The informative LCD display shows real-time CO levels and battery status, adding a layer of convenience and transparency.

The X-Sense detector is a reliable and user-friendly option for those prioritizing safety in their homes. It offers important features and solid performance.

The AEGISLINK Interlinked Smoke Carbon Monoxide Detector Combo offers a reliable and comprehensive solution for home safety. It's designed to alert you to both smoke and carbon monoxide dangers using dual sensors, which means added protection in a single device. One of its standout features is the interconnectivity through wireless radio frequency, ensuring that if one alarm goes off, they all do, covering your entire home effectively. This is especially useful for multi-story buildings, as up to 24 units can be linked together for complete coverage.

The alarms are battery powered, with batteries included, and offer a long sensor life of up to 10 years, reducing the need for frequent replacements. Installation is straightforward with the screw-in method, and the device includes a one-button control for testing and silencing all alarms in the network. The informative LCD screen provides clear readings of CO levels, battery status, and operational status, ensuring you are always informed. However, being battery-powered means occasional maintenance is required to replace the batteries.

The alarm volume at 85 dB is loud enough to alert everyone in the house but might not be sufficient in very noisy environments. This product would benefit households looking for a reliable, easy to install, and interconnectable smoke and CO detection system, though the need for battery changes and its volume level might require some consideration.