10 Best Smoke Detector Carbon Monoxide Detectors Combo 2025 in the United States

The Kidde Hardwired Smoke & Carbon Monoxide Detector is a reliable and cost-effective option for ensuring home safety. It provides dual detection for both smoke and carbon monoxide with its photoelectric and electrochemical sensors. This means you get protection from two hazards with just one device. The hardwired setup, coupled with a 10-year battery backup, ensures continuous operation without the need for frequent battery changes, which can save you money over time.

The device is designed to minimize false alarms from common causes like cooking, which adds to its convenience. Additionally, the clear voice alerts differentiate between fire and carbon monoxide hazards, making it easier to understand the type of danger and react quickly. The interconnectivity feature means that if one alarm goes off, all connected alarms will also sound, enhancing safety throughout your home.

The LED indicators provide a quick visual status check, and the self-testing feature adds another layer of reliability, though manual tests should be performed weekly. The hardwired installation may require professional assistance if you are not comfortable with electrical work. While the initial cost might be higher compared to standalone battery-operated models, the long-term savings and enhanced safety features make it a worthwhile investment. The device also boasts a modern design and compact size, fitting well into various home decors. With a 10-year warranty, it is a solid choice for those looking to upgrade their home safety systems.

The X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector offers a comprehensive safety solution for your home. Equipped with both a photoelectric smoke sensor and an electrochemical CO sensor, it ensures reliable detection of both smoke and carbon monoxide. This 6-pack model allows you to interconnect up to 24 devices, ensuring that when one alarm goes off, all of them do, providing extensive coverage and early warnings throughout your home.

One standout feature is the built-in 10-year lithium battery, which means you don't have to worry about replacing batteries for a decade. Additionally, the LCD display is very informative, showing real-time CO levels, battery status, and working status, which helps in maintaining the device easily. However, it's important to note that while these detectors support wireless interconnection, they do not have Wi-Fi capabilities. If you need Wi-Fi, you would want to look for a different model, specifically the SC07-WX. The alarms are battery-powered, which makes installation straightforward without the need for hardwiring.

The detectors are made from heat-resistant PC plastic, making them durable and reliable. If you're looking for a combination smoke and CO detector that ensures extensive coverage, long battery life, and ease of use, the X-Sense SC07-W is a solid choice.

The First Alert SMICO100-AC is a combination smoke and carbon monoxide detector that offers robust safety features and user convenience. It uses ionization sensor technology, which is effective in detecting fast-flaming fires commonly found in home environments. The hardwired power source with a battery backup ensures continuous protection even during power outages. This model is designed for easy installation with its Quick Connect Plug, eliminating the need for rewiring, which is ideal for those who prefer straightforward setups.

One of its standout features is its interconnectivity capability, meaning when one alarm triggers, all connected alarms will sound, providing comprehensive coverage throughout your home. This can be a crucial feature for larger homes or multi-story buildings. The test/silence button allows for regular testing and easy silencing of nuisance alarms, which is helpful for maintaining the device without much hassle. Durability is another aspect, as it complies with new industry standards aimed at reducing false alarms during cooking, which is a common issue with older models.

However, the unit uses an ionization sensor, which is less effective in detecting smoldering fires compared to photoelectric sensors. The hardwired installation might be a drawback for those without existing wiring setups or who prefer battery-only models. This product is best suited for homeowners looking for a dependable, easy-to-install, and interconnected alarm system for enhanced safety.