infiltration

unintentional or accidental introduction of outside air into a building, typically through cracks in the building envelope and through use of doors for passage

Infiltration may refer to: ==Science, medicine, and engineering== Infiltration (hydrology), downward movement of water into soil Infiltration (HVAC), a heating, ventilation, and air conditioning term for air leakage into buildings Infiltration (medical), the diffusion or accumulation of substances or cells not normal to it or in amounts in excess of the normal Infiltration/Inflow, leakage of groundwater into sanitary sewers ==Art== Infiltration (2017 film), a Canadian film Infiltration (2022 film), Russian war drama film "Infiltration" (Star Wars: The Bad Batch) ==Other uses== Entryism, the infiltration by a political organisation of another, usually larger, organisation In espionage, using double agents to join an enemy organization Infiltration tactics, tactics developed by the German army in early 1915 that broke the trench-warfare stalemate on the western front Urban exploration, exploring parts of towns, etc. which are normally off-limits Infiltration (zine), a popular urban exploration zine/website created by Jeff Chapman (Ninjalicious) Seon-Woo Lee (born 1985¹), professional electronic sports players, specializing in fighting games, who plays under the alias Infiltration ==See also== Infiltrator (disambiguation)

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