ABAA Whole-Building Airtightness Testing (WBAT) Level 1 Practice Exam – Prep & Study Guide

The correct answer is determined by the specifications laid out in ASTM E779 - 19 regarding the testing of whole-building airtightness. According to this standard, the minimum test pressure is set at 10 Pascal (Pa), which ensures that the building can be effectively assessed for air leakage at a standardized pressure that reflects realistic conditions. The maximum test pressure is capped at 60 Pa, which is high enough to identify significant air leakage issues without causing damage to the building structure or its systems.

This range is critical because it balances the need for thorough testing with the potential risk of over-pressurization, which could lead to unexpected results or harm. Understanding these parameters is essential for anyone involved in building performance testing, as they establish the framework within which measurements are taken to ensure reliable and consistent results.