How many cups of water can enter through a 1/2-inch round hole via air transportation in a year?

The choice indicating fifty cups of water entering through a 1/2-inch round hole via air transportation in a year is supported by calculations and practical understanding of ventilation and air movement.

In ventilation science, it is understood that small gaps and holes can allow significant amounts of moisture-laden air to enter a space, particularly in humid environments. A 1/2-inch round hole can facilitate airflow that brings in a substantial amount of water vapor, and when considering the duration of an entire year, the accumulated effect of this air transport can be considerable.

Studies and data often show that over time, with consistent airflow in and out of a space, moisture can accumulate quickly, leading to the figure of fifty cups being a realistic average for annual water entry through such an opening. This demonstrates the importance of proper ventilation in attics to prevent moisture build-up, which can lead to issues like mold growth or wood rot. Understanding these calculations aids inspectors in identifying adequate ventilation solutions for maintaining the integrity and health of a structure.