What conditions are required for short-term radon testing?

Short-term radon testing is typically conducted under closed-building conditions with specific instructions to ensure the accuracy and reliability of the results. Closed-building conditions involve maintaining the home closed up, with windows and doors shut, for a minimum time before and during the testing period. This is essential because it prevents outside air, which may have different radon levels, from entering the home and altering the test results.

By adhering to these specific instructions, the test can effectively measure the concentration of radon over a shorter duration, usually two to seven days. This ensures that the conditions remain stable and reflect the radon levels present in the indoor environment, giving a more accurate representation of potential radon exposure. Hence, the requirement of closed-building conditions with specific instructions is critical for achieving reliable and valid testing outcomes.