Which test suits which situation, how to place it, how long to run it, and when a DEP-certified tester is required rather than a do-it-yourself kit.
How to verify Pennsylvania DEP certification, what an itemised mitigation quote should contain, and the questions that separate a considered proposal from a number on a page.
At or above 4 pCi/L, the EPA recommends action. Between 2 and 4 pCi/L, mitigation is worth considering. No level is regarded as entirely without risk, and levels fluctuate — which is why a borderline short-term result is usually worth confirming with a long-term test.
Post-mitigation testing, what to do if the system does not achieve the target, fan warranties and lifespan, and how often to retest thereafter.
Ask about a test result, a mitigation quote, or verifying DEP certification anywhere in York County.