True or False: It is advised to perform diagnostic tests to evaluate back-drafting potential during building investigations.

Performing diagnostic tests to evaluate back-drafting potential during building investigations is indeed advisable. Back-drafting occurs when air moves down a chimney or vent instead of flowing out, which can lead to a buildup of hazardous gases, including radon, in living spaces. Understanding whether back-drafting is occurring can help in assessing indoor air quality and the overall safety of a building, especially when radon levels are a concern.

By conducting these tests, professionals can identify factors that contribute to back-drafting, such as pressure differentials that might result from changes in ventilation or temperature. This analysis is essential because addressing back-drafting issues can significantly improve the effectiveness of radon mitigation systems and enhance the indoor environment for occupants.

While testing may be particularly important in buildings with high radon levels, it is generally prudent to evaluate back-drafting potential regardless of current radon measurements to ensure comprehensive indoor air quality assessments and remediation strategies. Thus, the recommendation to conduct these diagnostic tests is a key aspect of thorough building investigations.