Which factors should be inspected or recorded in a radon mitigation system?

The correct choice emphasizes the importance of a comprehensive evaluation of the radon mitigation system. Inspecting and recording the operational status ensures that the system is functioning effectively at the time of assessment, which is crucial for maintaining low radon levels. Temporary mitigation strategies are also essential to note, as they can indicate whether the system is using short-term measures that may not provide long-term safety. Discharge point height is significant because it contributes to the overall effectiveness of radon removal; a properly positioned discharge point can influence the dispersion of radon gases away from the home.

In contrast, focusing solely on the fan's voltage and wattage would not provide a complete picture of the system's effectiveness or its operational status. Understanding the location of pipes and wall connections is important for installation and maintenance but does not encompass the critical operational aspects that could impact radon levels. While the presence of a radon monitor and testing logs is useful for ongoing monitoring, it does not cover the operational inquiries necessary for evaluating the mitigation system's current performance. Hence, choosing the first option ensures a broader understanding of the factors that contribute to the efficacy of a radon mitigation system.