Home/Smoke Detectors/Kidde Firex KN-COSM-IBA Hardwired Combo

Affiliate Disclosure: PickClarity earns commissions from qualifying purchases through our partner links. Our rankings are editorially independent — they are never influenced by affiliate relationships or commission rates. Learn more about our methodology.

#7 in Smoke Detectors

Kidde Firex KN-COSM-IBA Hardwired Combo

Name: Kidde Firex KN-COSM-IBA Hardwired Combo
Brand: Kidde
Rating: 8.1 (1 reviews)

Kidde

$35.00 – $48.00

Hardwired ionization smoke and electrochemical CO combo detector with 9V battery backup. The voice alarm announces the type of hazard detected — fire or carbon monoxide — so occupants know which emergency protocol to follow.

8.1

Good

Consensus

Our Analysis

Ranked #7 based on expert reviews, user sentiment, and value analysis.

Score Breakdown

Expert Score

8.1

User Sentiment

8.2

Value Score

8.8

Complaint Risk

8.7

Freshness

8.2

Community

8.5

Availability

9.1

Pros

Voice alarm announces hazard type
Voice alarm announces hazard type
Dual smoke and CO protection
Dual smoke and CO protection
Interconnects with other Kidde units
Interconnects with other Kidde units

Cons

Ionization sensor prone to cooking false alarms
Ionization sensor prone to cooking false alarms
Requires hardwired installation
Requires hardwired installation

Don't buy this if…

Do not install ionization detectors near kitchens or bathrooms — steam and cooking smoke trigger false alarms.
Do not install ionization detectors near kitchens or bathrooms — steam and cooking smoke trigger false alarms.