What is the required distance from the floor for a radon test?

The correct distance from the floor for conducting a radon test is typically established to ensure accurate measurements while accounting for factors that might affect radon concentration levels. Radon detectors should usually be placed at least 20 inches above the floor. This height is recommended because radon gas tends to accumulate closer to the ground, and testing at this elevation helps capture a more representative sample of air that individuals are actually breathing. Placing the test too close to the floor may result in interference from factors like fluctuations in airflow or ground contact, which could lead to misleading results.

In general practice, adhering to this guideline ensures the reliability of the radon test results and aids in making informed decisions regarding radon mitigation when necessary.