The Stack Effect is a natural phenomenon that occurs in buildings, where warm air rises and creates a pressure difference. As the warm air moves upward, it creates a vacuum at the lower levels, drawing in cooler air from outside. This effect is most noticeable in tall structures, where the temperature difference between the inside and outside can be significant. This process is influenced by factors such as the height of the building and the temperature difference between the indoor and outdoor air. The Stack Effect can impact energy efficiency and indoor air quality, making it an important consideration in the design of buildings and ventilation systems.