What is the optimal deployment period for an open face ACD?

The optimal deployment period for an open face activated charcoal detector (ACD) is typically between 2 to 3 days. This timeframe allows for an accurate measurement of radon levels, as it balances the need to capture fluctuations in radon concentrations while minimizing external influences such as weather conditions, ventilation changes, or occupancy variations.

During this period, the ACD can effectively adsorb radon gas without becoming saturated, ensuring that the readings reflect the indoor air quality during the measurement interval instead of skewed data caused by short-term spikes or the effects of varying environmental factors. The 2 to 3-day window is widely accepted as it aligns with the guidelines set by radon measurement protocols, which emphasize the importance of both accuracy and reliability in radon detection.

Choosing a deployment period shorter than 2 days might lead to insufficient exposure for an accurate reading, while extending the period beyond 3 days could risk introducing inaccuracies due to saturation of the detector or changes in environmental conditions impacting radon levels.