10 Best Wired Smoke Alarms 2025 in the United States

The First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm is a reliable option featuring advanced sensing technology that reduces false alarms from cooking. It uses ionization sensors to detect smoke and carbon monoxide, providing an early warning in case of a fire emergency.

One of its significant benefits is the interconnectivity feature, meaning when one alarm goes off, all connected alarms will sound. This is particularly useful in larger homes for comprehensive safety coverage. Additionally, the quick connect plug allows for straightforward installation without the need for extensive rewiring, making it user-friendly for most homeowners.

Its battery backup ensures continuous protection even during power outages, which is a crucial safety feature. The test/silence button adds convenience by allowing easy testing and silencing of the alarm when needed. Users who prefer a simple, dependable smoke and CO alarm will appreciate what this model offers.

The Kidde Hardwired Smoke Detector with Battery Backup is a solid choice for anyone looking to install a reliable wired smoke alarm in their home. It uses ionization sensor technology, which is particularly good at detecting fast-flaming fires that produce invisible particles. The alarm is loud enough at 85 decibels to alert most people effectively. This model connects to your home's 120V wiring but also includes a 9V battery backup, so it continues working during power outages — an important safety feature.

You can interconnect up to 24 Kidde devices, including smoke, carbon monoxide, and heat alarms, allowing the entire system to alert you if any unit detects trouble. Installation is relatively straightforward, and the front-load battery door makes changing the backup battery quick and hassle-free. The test-silence button on the face of the alarm lets you easily check functionality or temporarily hush false alarms, adding convenience.

This unit focuses on basic smoke detection and does not include advanced smart features like Wi-Fi connectivity or app alerts. Its maximum operating temperature is 100°F, which is typical but something to watch for in warmer environments. The device holds important safety certifications and comes with a 10-year limited warranty from the start of power-on, though the manufacturer has discontinued this model. The Kidde alarm offers dependable, easy-to-use smoke detection with solid interconnectivity and backup power, making it a good fit for homes wanting a tried-and-true wired system without the complexity of smart tech.

The Kidde Hardwired Smoke & Carbon Monoxide Detector combines smoke and carbon monoxide detection in one device, which is cost-effective and space-saving. It uses advanced photoelectric and electrochemical sensors to detect smoke and carbon monoxide accurately. The alarm operates on a hardwired power source with a backup from two AA batteries, ensuring continuous protection even during power outages.

The interconnectivity feature is beneficial for larger homes, as it allows all connected alarms to sound simultaneously when one is triggered, enhancing safety. The alarm volume is robust at 85 decibels, ensuring that it is loud enough to be heard in an emergency. The three LED notifications provide clear indicators of the alarm's status, making it easy to understand its condition at a glance.

Installation is straightforward thanks to the included mounting hardware and user guide, though some users might need professional help if they are not comfortable with electrical wiring. The device also includes a test and hush button for easy testing and silencing of false alarms. While it doesn't have advanced smart features like app connectivity, it meets rigorous safety standards and includes a 10-year limited warranty, which indicates its reliability. It might not be suitable for those looking for the latest smart home integrations. The self-testing feature is a plus, but it doesn't replace the need for regular manual testing. This detector is ideal for homeowners seeking a reliable, dual-function smoke and carbon monoxide alarm with essential safety features without the need for smart home compatibility.