Which of the following is true about pressure zones in a building?

Pressure zones within a building refer to areas where the air pressure can vary due to factors such as ventilation, heating, and cooling systems, as well as building design. The statement that there are positive and negative pressure zones is accurate because it reflects the natural behavior of air movement in buildings. Positive pressure zones occur when the air pressure inside a space is greater than the outside, often due to mechanical ventilation pushing air in. Conversely, negative pressure zones happen when the internal pressure is lower than the external pressure, which can occur when air is exhausted from a space faster than it is replaced.

This distinction is crucial for understanding airflow and ventilation within a building. The presence of both pressure types affects how air circulates, balances room air quality, influences heating and cooling performance, and can even impact moisture control and building durability. Understanding these dynamics helps building analysts ensure effective design, energy efficiency, and occupant comfort.