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 SMCO100 3-pack offers dependable 2-in-1 protection against smoke and carbon monoxide using photoelectric sensors, which are effective at detecting slow, smoldering fires. These alarms run on batteries, making them easy to install without wiring, and the included AA batteries allow for immediate setup. They feature a test/silence button to quickly check if they're working or temporarily silence nuisance alarms, which can be helpful during cooking. The alarms also alert you when they reach their end of life, reminding you to replace them for continued safety.

One limitation is that these alarms are not interconnected, so if one sounds an alert, the others won’t automatically activate. This may be less ideal for larger homes where interconnected alarms can provide earlier warnings throughout the house. Being battery-powered means you avoid complex installation but should remember to replace batteries regularly to maintain reliable operation. The alarm volume is loud enough for most homes to wake residents in case of emergency.

These alarms are suited for those seeking straightforward, reliable smoke and CO detection without the need for smart home connectivity or wiring. They are particularly good if you want easy setup and maintenance with trusted detection technology, but if interconnected alarms that communicate with each other or advanced smart features are needed, other options might be more appropriate.