Question 1

Which is better, Kidde Nighthawk CO Detector or First Alert CO710?

Accepted Answer

Both products scored 8.5/10 in our testing — it's a tie. Choose based on which features matter most to you.

Question 2

Is the Kidde Nighthawk CO Detector worth it over the First Alert CO710?

Accepted Answer

The Kidde Nighthawk CO Detector scores 8.5/10 while the First Alert CO710 scores 8.5/10. The Kidde Nighthawk CO Detector is our "Best Overall" pick in the Best Carbon Monoxide Detectors 2026 category.

Kidde Nighthawk CO Detector vs First Alert CO710: Which to Buy?