How long should closed conditions be maintained before a radon test?

Maintaining closed conditions for at least 12 hours before conducting a radon test is essential for ensuring the accuracy and reliability of the test results. Closed conditions refer to keeping windows and doors closed, avoiding activities that could alter airflow (like using exhaust fans or air conditioning systems), and not introducing outside air into the building.

This time frame allows for stabilization of radon levels in the environment of the tested area. If the closed conditions are not maintained long enough, variations in radon concentration due to external factors can cause misleading test results. By ensuring that the environment has been stable for at least 12 hours, we can be more confident that the radon levels measured during the test truly reflect the concentrations present in the home or building under typical living conditions.

This approach helps in making accurate assessments of radon exposure, which is critical for health and safety when determining remediation needs.