What is the recommended "ramp up" period for radon monitoring?

The recommended "ramp up" period for radon monitoring is typically set at 4 hours. This period allows the radon monitoring device to stabilize and accurately reflect the radon levels in the environment being tested. The ramp-up time is critical because radon concentrations can vary significantly based on factors such as temperature, ventilation, and time of day. Allowing for a sufficient period helps ensure the readings obtained are reliable and representative of the conditions over a longer duration, thereby aiding in making informed decisions about radon mitigation if necessary. This standard is rooted in ensuring that the data collected reflects the average radon levels present, rather than transient spikes, providing a clearer picture of radon exposure risks.