Given: The four levels of Ventilation Strategies that were covered in this course were based on the traditionally established criteria of Annual Precipitation. Historically, this has been an effective strategy used for optimizing our building's durability as it relates to bulk water penetrating the rain screen and collecting in the ventilation cavity and on the Weather Resistive Barrier (WRB). As we have moved toward higher and higher building performance mandates the use of the Ventilated Rain Screen or at least the Vented Rain Screen has become a common practice. What is reason for this change in light frame construction