10 Best Interconnected Smoke Alarms 2025 in the United States

This set of three interconnected smoke and carbon monoxide alarms offers strong dual protection with photoelectric smoke and electrochemical CO sensors, detecting dangers quickly and accurately. The wireless interconnectivity means when one alarm sounds, all three do, covering a wide range of your home (up to 300 meters), which is great for instant alerts wherever you are. Powered by built-in 10-year lithium batteries, these alarms require no wiring or frequent battery changes, making installation quick and hassle-free with the included mounting hardware.

The alarms feature a clear LCD display that shows real-time CO levels and battery status, along with colored LED lights to indicate smoke or CO alerts, helping you stay informed easily. The unit is tested to meet important safety standards and comes with lifetime U.S.-based support and free replacement for peace of mind.

This product suits homeowners looking for long-lasting, easy-to-install alarms that protect against both smoke and carbon monoxide without complex wiring or maintenance.

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 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.