Menards kidde smoke and carbon monoxide alarm

Best Combination Smoke and Carbon Monoxide Detectors CR's take: If you need a hardwired combination detector, the First Alert SC7010B is your best bet. It performs well in our CO and smoldering fire tests, though it receives a Poor rating in our flaming fire test.

In accordance with the National Fire Protection Association (NFPA), Kidde recommends replacing smoke and heat alarms every ten years, and replacing carbon monoxide and combination alarms every seven to ten years (depending on your model) to benefit from the latest technology upgrades.

First Alert has better features than the Kidde because of the alarm system with a verbal warning of the threat.