What is the minimum distance radon measurement devices should be placed from doors, windows, or any openings to the outside?

The minimum distance that radon measurement devices should be placed from doors, windows, or any openings to the outside is 3 feet. This guideline is critical because placing the measuring devices too close to these openings can lead to inaccurate readings. The air exchange from outside can dilute radon levels or introduce different air pressure conditions that might not represent the radon concentration in the ambient environment of the home.

By maintaining a distance of 3 feet, the devices are better positioned to capture the radon levels present in the indoor air, providing a more precise assessment of potential health risks associated with radon exposure. This distance helps ensure that the readings reflect the actual conditions within a residential setting, promoting more reliable data for evaluating radon levels.