Kidde Intelligent Alarm Battery Operated Combination Smoke & Carbon Monoxide Alarm

Last updated date: April 17, 2019

Review Melt Score

Why Trust The Review Melt Score?

Review Melt is the #1 product review aggregator. Our team analyzes thousands of product reviews from the most trusted websites. We then "melt" them into one easy-to-understand score. Learn more.

Look for the Review Melt seal for products that are the best in the category.

We looked at the top 1 Smoke Detectors and dug through the reviews from 6 of the most popular review sites including BestReviews, Top Ten Reviews, SafeWise, Tuck, Review Lab, Find The Top 10 and more. Through this analysis, we've determined the best Smoke Detector you should buy.

Overall Take

In our analysis of 65 expert reviews, the Kidde Kidde Intelligent Battery Operated Combo Alarm placed 7th when we looked at the top 10 products in the category. For the full ranking, see below.

Editor's Note March 29, 2019:
Checkout The Best Smoke Detector for a detailed review of all the top smoke detectors.

Expert Summarized Score
6 expert reviews
User Summarized Score
198 user reviews
Our Favorite Video Reviews
What experts liked
Wireless interconnectivity eliminates the need to rewire entire house for single new unit.
- BestReviews
This smoke detector’s combination smoke and carbon monoxide (CO) alarm includes a voice alarm that tells you the nature of the hazard detected.
- Top Ten Reviews
You can protect your home and family with this highly rated device that’s priced to work for most budgets.
- SafeWise
January 18, 2018 | Full review
The Kidde KN-COSM-BA is a combination smoke detector and carbon monoxide alarm, eliminating the need to install (and spend money) on multiple devices, while providing your home with the protection you need.
- Tuck
September 6, 2018 | Full review
This combination smoke and carbon monoxide detector eliminates confusion with voice alarms that let you know which type of danger is present, which can save you time in an emergency.
- Review Lab
This detector is very interesting as it has both the standard beeping alarm coupled with a voice alarm.
- Find The Top 10
What experts didn't like
Expensive, and must be hardwired to the same circuit as other wireless units.
- BestReviews
However, its inability to interconnect with other smoke detectors means that only the alarm exposed to smoke or CO will be activated.
- Top Ten Reviews
This Kidde smoke alarm can’t be hardwired, so there’s no option to connect it with other alarms throughout your home.
- SafeWise
January 18, 2018 | Full review
Also, while the expected lifespan is 10 years, the alarm is covered by only a 5-year warranty.
- Tuck
September 6, 2018 | Full review
Some reviewers complain that they were sold out-of-date detectors.
- Review Lab

From The Manufacturer

The Kidde KN-COSM-XTR-BA uses breakthrough technology to offer a fast response to real fires, including smoldering and fast-flaming, as well as protect you from carbon monoxide and dramatically reduce the chance of nuisance alarms. In addition, the Intelligent Alarm contains a voice warning that clearly states the present danger – smoke or carbon monoxide – and announces “FIRE!” or “WARNING! CARBON MONOXIDE!” The Intelligent Alarm combines the detection capabilities of an ionization smoke sensor – which is more likely to detect smaller, less visible fire particles, like those produced by flaming fires – with that of an electrochemical sensor, which is used to detect CO. Since carbon monoxide is present in all fires, having both detection chambers work together in one alarm is a breakthrough in the fire safety industry. When either sensor notices a potential hazard, it will communicate with the other. Depending on what is detected, the alarm will adjust its smoke sensitivity in order to better discriminate between a real hazard and a false one. This constant communication enhances the alarm’s overall performance in all fires, and significantly reduces the potential for a nuisance alarm. This alarm uses ionization sensing technology. Leading authorities recommend that both ionization and photoelectric smoke alarms be installed to help insure maximum detection of the various types of fires that can occur within the home. Ionization sensing alarms may detect invisible fire particles (associated with fast flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible fire particles (associated with slow smoldering fires) sooner than ionization alarms.

Overall Product Rankings

1. Nest Protect Smoke and Carbon Monoxide Alarm
Overall Score: 9.4
Expert Reviews: 9
3. Kidde Hardwire Smoke Alarm
Overall Score: 9.0
Expert Reviews: 9
4. Alert Pro 10 Year Battery Smoke Detector Fire Alarm
Overall Score: 8.9
Expert Reviews: 1
5. First Alert Interconnected Wireless Smoke Alarm
Overall Score: 8.4
Expert Reviews: 7
6. First Alert Dual-Sensor Smoke and Fire Alarm
Overall Score: 8.3
Expert Reviews: 7
8. Leeo Smart Alert Smoke/CO Remote Alarm Monitor
Overall Score: 7.8
Expert Reviews: 8
9. First Alert Smoke Alarm With Photoelectric Sensor
Overall Score: 7.4
Expert Reviews: 4
10. First Alert P1000
Overall Score: 6.5
Expert Reviews: 1

An Overview On Smoke Detectors

Review Melt Fun Fact

The Smoke Detector Buying Guide