What is the minimum waiting period before conducting a post-mitigation radon test?

The minimum waiting period before conducting a post-mitigation radon test is 24 hours. This duration allows the radon levels to stabilize in the home environment following the mitigation process. Immediately testing after mitigation may not accurately reflect the long-term radon levels since the system may still be in the process of reducing radon concentrations.

Waiting for 24 hours ensures that conditions are suitable for a reliable measurement. It allows for a consistent environment where the radon mitigation system can operate effectively, and any transient fluctuations in radon levels have been addressed. Therefore, this period is critical for providing an accurate assessment of the effectiveness of the mitigation efforts.