Ventilation

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late Middle English (in the sense ‘current of air’): from Old French, or from Latin ventilatio(n- ), from the verb ventilare (see ventilate). ventilation (sense 1) dates from the mid 17th century.

wiktionary

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Borrowed from Middle French ventilation, from Old French ventilacion, from Late Latin ventilatio, from Latin ventilo. Morphologically ventilate +‎ -ion

etymonline

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ventilation (n.)

"process of replacing foul air in an enclosed place with fresh, pure air," 1660s, from Latin ventilationem (nominative ventilatio) "an exposing to the air," noun of action from past participle stem of ventilare (see ventilate).