What is the purpose of an extended radon test?

An extended radon test is typically used to obtain a more accurate and reliable measurement of radon levels over a longer period. This type of testing usually lasts 91 days or more, which allows for the assessment of seasonal variations in radon levels.

The primary purpose of an extended radon test is to measure radon levels during occupancy, ensuring that the results reflect the actual conditions in the home over time, including fluctuations due to changes in temperature, humidity, and ventilation. Therefore, while option B mentions that extended testing is not recommended for real estate assessments, the real focus should be on its utility in providing a more comprehensive understanding of radon exposure that occurs during normal occupancy.

In contrast to short-term tests, which may not account for variability, extended radon tests help homeowners and occupants make informed decisions regarding mitigation and safety. Thus, it becomes clear that the essence of extended testing lies in its ability to reflect radon exposure during the actual living conditions, which is crucial for assessing long-term health risks associated with radon.