The First Alert 3120B is part of the Smoke & Carbon Monoxide Detectors
test program at Consumer Reports. In our lab tests, Smoke & Carbon Monoxide Detectors
models like the 3120B are rated on multiple criteria, such as those listed below.
Flaming fires: Flaming fires is response time to paper fires with little smoke.
Smoldering fires: Smoldering fires is response time to wood-fed smoky fires.