10 Best Smart Smoke Detector 2025 in the United States

The X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector is designed to provide comprehensive safety for your home. Its main strength lies in the interconnected feature; when one unit detects smoke or CO, all interconnected units will alarm, ensuring that you are alerted promptly no matter where you are in the house. With the ability to connect up to 24 devices, this system can effectively cover larger spaces, making it a great choice for families living in bigger homes.

The smoke detector uses advanced detection technology, combining photoelectric and electrochemical sensors, which enhances its reliability in detecting both smoke and harmful CO levels. The informative LCD display is another plus, showing real-time CO levels and battery status, keeping you informed about the unit’s functionality.

On the practical side, the built-in 10-year battery is a significant advantage, removing the hassle of battery replacements during the lifespan of the unit. Installation is straightforward, as they are screw-in models and lightweight, weighing only 300 grams each.

However, this model does not support Wi-Fi, which may limit smart home integration for users looking for more advanced features such as remote monitoring via smartphone apps. If Wi-Fi connectivity is a priority for you, you would need to consider the alternative model, SC07-WX. Additionally, while the coverage per detector is decent, it is recommended for spaces up to 215-430 sq. ft., so you'll need to ensure adequate placement throughout your home for maximum protection.

The First Alert Smoke Alarm SMI100-AC 3-Pack is designed to provide reliable fire detection with a focus on reducing false alarms from cooking using its Precision Detection technology. This ionization sensor-based detector offers early warning to help keep your home safe. One strong point is its interconnect feature, which ensures that when one alarm sounds, all compatible units in your home will activate, giving you a clear and widespread alert.

The battery backup is another plus, providing continuous protection even during power outages, so you don’t have to worry about losing your smoke alarm’s functionality. Installation is made easier with the included Quick Connect Plug, which means you can set it up without rewiring your home’s electrical system. However, it's worth noting that these alarms do not offer Wi-Fi or app connectivity, so they lack remote alerts or smart home integration that some other smoke detectors have.

The unit uses standard 9V alkaline batteries, which are included, but they will need regular replacement to keep the alarm working optimally. Maintenance is relatively straightforward, especially with the visual alarm indicator that shows which alarm was triggered. This 3-pack is a solid choice for anyone wanting dependable, wired smoke alarms with battery backup and simple installation, especially if you prefer straightforward devices without the need for smartphone controls or complex smart features.

The Kidde Hardwired Smoke & Carbon Monoxide Detector offers a comprehensive 2-in-1 detection for both smoke and carbon monoxide, making it a cost-effective solution for home safety. Its hardwired installation ensures a stable power source, while the 10-year battery backup adds reliability by eliminating frequent battery replacements. This is particularly beneficial for users seeking long-term, low-maintenance safety devices. The enhanced sensing technology is designed to reduce false alarms, which is a common annoyance in many detectors, especially those triggered by cooking smoke. This makes it suitable for installation in various parts of the home, including the kitchen.

The voice alerts are a notable feature, providing clear instructions in emergencies, which can be crucial for quick reactions. Additionally, the interconnect capability means that if one alarm goes off, all connected alarms will sound, providing a broader safety net throughout the home. The self-testing feature helps ensure the device is functioning properly, though users should still perform manual tests regularly. The LED notifications offer straightforward visual indicators of the device's status, which can be reassuring.

However, the hardwired installation might be a drawback for some users, especially renters or those not comfortable with electrical installations. Professional installation may be required, adding to the initial costs. Despite these considerations, the 10-year warranty provides peace of mind regarding the product's longevity and reliability. The Kidde detector is well-suited for homeowners looking for a reliable, low-maintenance smoke and CO detection system with modern features.