10 Best Interconnected Smoke Alarms 2025 in the United States

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 Kidde Hardwired Smoke Detector is a reliable choice for those looking for interconnected smoke alarms. It features a hardwired installation with a 10-year battery backup, which means it remains operational even during power outages and reduces the hassle of frequent battery changes. The interconnect capability ensures that when one alarm triggers, all others will sound, providing comprehensive home protection. The photoelectric sensor is designed to minimize false alarms usually caused by cooking, which is a common concern in many households.

Installation might be a bit involved since it requires 120V AC wiring, making it more suitable for permanent residences rather than temporary setups. However, once installed, the 10-year warranty and the maintenance-free battery life can offer peace of mind. The alarm at 85 decibels is quite loud, ensuring you'll be alerted in case of an emergency.

Smart features include LED indicators for different statuses: green for regular operation, amber for errors, and red for smoke detection. The self-testing function is a nice touch, although users are still encouraged to perform manual tests regularly. Additionally, the Test & Hush button helps in testing the device and silencing false alarms. Kidde's smoke detector is well-suited for individuals looking for a durable and efficient smoke detection system with minimal maintenance. While it might not have advanced smart-home integration features, its focus on safety and reliability makes it a solid investment for home security.

The First Alert SMICO100-AC is a combination smoke and carbon monoxide alarm designed for enhanced safety through its interconnected capabilities. This means that when one alarm sounds, all compatible alarms will also sound, providing comprehensive coverage throughout the home. Its power source is corded electric, ensuring a constant power supply, complemented by a battery backup for continued protection during power outages—a significant advantage for reliability.

The ionization sensor is effective at detecting fast-flaming fires, though it may be more prone to false alarms from cooking, despite the advanced sensing technology aimed at reducing such nuisances. The alarm volume is adequate to alert occupants, and the test/silence button allows for easy maintenance and testing. Installation is user-friendly with a Quick Connect Plug that negates the need for rewiring, making it a good choice for those who may not be particularly handy.

However, the reliance on a single sensor type means it may not be as effective at detecting smoldering fires as dual-sensor alarms. Additionally, while the included battery is a plus, it will need regular checking to ensure it remains functional. Ideal for homeowners seeking a reliable and interconnected alarm system, the First Alert SMICO100-AC is a robust choice that balances ease of installation with necessary safety features.