For large homes, additional test locations are recommended when the area exceeds what size?

In the context of radon measurement, it is important to ensure that adequate testing coverage is provided in larger homes to accurately assess radon levels. The recommendation for additional test locations typically suggests that when the size of a home exceeds 2,000 square feet, multiple testing locations should be utilized. This is because radon concentrations can vary significantly throughout a home due to factors such as building materials, ventilation, and the geography of the surrounding area.

By testing in multiple locations, you enhance the reliability of the radon level readings and can get a more comprehensive understanding of potential exposure risks throughout the different spaces of the home. Homes larger than 2,000 square feet are more likely to have these variations, making it crucial to conduct adequate testing in various rooms, particularly on lower levels where radon accumulation is most likely to occur.