Ventilation

Ventilation may refer to:


 * Ventilation (physiology), the movement of air between the environment and the lungs via inhalation and exhalation
 * Mechanical ventilation, in medicine, using artificial methods to assist breathing
 * Respirator, a machine designed to move breathable air into and out of the lungs
 * Ventilation (architecture), the process of "changing" or replacing air in any space to provide high indoor air quality
 * Ventilation (firefighting), the expulsion of heat and smoke from a fire building
 * Ventilation (mining), flow of air to the underground workings of a mine of sufficient volume to dilute and remove noxious gases