Which factor is NOT something that is minimized in building air infiltration?

In building air infiltration, the goal is typically to minimize unwanted air exchange to enhance energy efficiency and maintain indoor air quality. However, the fresh air requirement is a critical aspect of ensuring a healthy indoor environment, and it cannot be minimized in the same way as other factors.

Fresh air is essential for diluting indoor pollutants, maintaining comfortable humidity levels, and ensuring sufficient oxygen levels for occupants. While energy loss, mold growth, and inefficient HVAC operation are factors that benefit from reducing air infiltration—since less unconditioned air entering a building can lead to lower energy costs, reduced humidity-related issues, and improved efficiency in heating, ventilation, and air conditioning—the need for fresh air is a necessity that is not compromised in a well-designed building.

Thus, while the other factors are indeed minimized to enhance the efficiency and health of the building environment, fresh air requirements must be adequately met to support the well-being of its occupants, making it the correct answer to this question.