Several factors influence the size of the air shower area:
Personnel Traffic: The number of individuals passing through the air shower area per unit of time significantly impacts its size.
Contaminant Source: The nature and amount of contaminants that individuals carry into the area also influence the air shower's dimensions.
Entry Equipment: If personnel need to carry equipment or large items, the air shower area should be sized to accommodate them.
Gowning Requirements: Different industries and applications might have varying gowning requirements, affecting the size needed for proper decontamination.