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    CR Expert Take

    How did it perform in our expert lab testing?

    Overall Score

    The Overall Score for this model is derived from our expert lab test results.
    Current Range of Tested Smoke Detectors

    What goes into the Overall Score?

    EXPERT LAB TESTS

    Flaming fires
    5  /  5
    Smoldering fires
    5  /  5
    Color
    N / A

    About

    The First Alert 3120B is part of the Smoke & Carbon Monoxide Detectors test program at Consumer Reports. In our lab tests, Smoke 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.

    Price & Shop