The RTCA 4 Pass Charcoal Canister is part of the Radon test kit test program at Consumer Reports. In our lab tests, Radon test kit models like the 4 Pass Charcoal Canister are rated on multiple criteria, such as those listed below.
Reliability: Reliability indicates how similar the readings were for several samples exposed under identical conditions. Those rated fair varied by more than 10 percent and up to 15 percent; those rated very good, by less than 8 percent.
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