To perform natural ventilation procedure using ASHRAE 62.1-2010, what data is required by the project?

The correct choice emphasizes the need for the location and size of natural ventilation openings, as this information is essential for assessing the effectiveness of natural ventilation strategies outlined in ASHRAE 62.1-2010. The standard focuses on ensuring sufficient fresh air is provided to building occupants, which is heavily influenced by the placement and dimensions of windows, doors, and other openings that facilitate airflow.

Understanding the size of these openings is critical because it directly impacts the volume of outdoor air that can enter a space. Additionally, the location of these openings determines how effectively outdoor air can be drawn in and how it can mix with indoor air, contributing to overall indoor air quality.

While ceiling heights can play a role in airflow dynamics, they are not as crucial as the specifics of natural ventilation openings when it comes to applying the standards of ASHRAE 62.1-2010. The other options present additional data that could be relevant for various building performance assessments but do not specifically pertain to the requirements for natural ventilation as dictated by the standard. The focus on size and location in the correct answer aligns with the principles of effective natural ventilation design.