True or False: Closed building conditions are not required for a long-term radon test.

The assertion that closed building conditions are not required for a long-term radon test is indeed true. Long-term radon tests, which typically last more than 90 days, are designed to measure average radon levels over an extended period. These tests provide a more stable indication of radon exposure since they take into account seasonal variations and occupancy patterns that might influence radon levels inside a home.

In long-term testing, while it is still beneficial to keep windows and doors closed as much as possible to minimize external influences on the radon levels, the closed building conditions are less rigidly enforced compared to short-term tests. In a long-term test scenario, the fluctuations in radon concentrations that may occur due to normal building usage and some ventilation do not significantly affect the accuracy of the results.

Given that long-term tests aim for a comprehensive understanding of radon exposure over time, the focus is more on capturing average values rather than requiring strict testing conditions during a short measurement period. Therefore, the characterization of closed building conditions as non-essential for long-term radon testing is accurate.