What is the neutral pressure plane in a building?

The neutral pressure plane in a building is defined as the height at which the air pressure is balanced, meaning the amount of air entering the building is equal to the amount of air leaving it. This concept is crucial in understanding how air moves in and out of a building, especially in relation to ventilation and indoor air quality. When the pressures are balanced at this plane, it indicates that there is no net airflow in either direction, leading to a stable indoor environment.

Recognizing this point is essential for effectively managing air quality and energy efficiency within a building. Understanding the neutral pressure plane allows building analysts to better evaluate the distribution of airflows and the impact of existing building features like windows, doors, and ventilation systems on overall indoor pressure dynamics.