What type of pressurization occurs when more air is delivered to a building than exhausted?

Positive pressurization occurs when a building receives more air than it exhausts. This condition results in higher air pressure inside the building compared to the outside environment. As a result, this can help prevent outdoor air contaminants, such as dust, pollen, and moisture, from entering the building. In addition, positive pressurization is often used in controlled environments, like cleanrooms or hospitals, where maintaining air quality is critical. When the air pressure is higher indoors, it acts as a barrier, pushing back against the infiltration of unconditioned outdoor air.

In contrast, negative pressurization would mean that more air is being exhausted from the building than is being brought in, which could lead to air from outside being pulled into the building. Absolute and relative pressurization are terms that are less commonly used in this context and do not specifically describe the air movement dynamics in buildings. Thus, positive pressurization is the correct term for the situation where a building is supplied with more air than it exhausts.