How often should external factors affecting radon levels be considered in measurement results?

External factors affecting radon levels should be considered regularly due to seasonal variations. Radon levels can fluctuate significantly depending on various environmental conditions such as temperature, humidity, and wind patterns. These factors influence both the radon entry points into buildings and the indoor air distribution, impacting the measurement results.

For example, during cold weather, homes are typically sealed more tightly, which can lead to increased radon concentrations. Conversely, warmer months may see increased ventilation and, potentially, reduced radon levels. Regular consideration of these external factors ensures that measurements reflect the most accurate radon levels and assist homeowners in understanding the potential risks. This ongoing assessment helps in developing effective radon mitigation strategies and in maintaining the health and safety of occupants over time.