ABAA Whole-Building Airtightness Testing (WBAT) Level 1 Practice Exam

The statement that pressure taps should not be placed directly in front of or behind fans is true. When pressure taps are located in close proximity to fans, the airflow generated by the fans can create turbulence and turbulence can lead to inaccurate pressure readings. This is because fans introduce dynamic pressure changes that can interfere with the static pressure measurements that the taps are intended to capture. Accurate air pressure measurements are critical for assessing the performance of a building's airtightness.

Placing pressure taps in areas affected by fan-induced airflow can lead to skewed results, making it challenging to obtain reliable data needed for analysis and reporting. Therefore, to ensure the integrity of the testing process and the validity of the results, it is essential to position pressure taps away from such disturbances. This practice is foundational in building performance testing methods, ensuring that obtained data reflects the true air leakage characteristics of the building envelope.