👉 Ventilation is the process of removing air or other gases from a space, usually through openings in walls, ceilings, and floors. This can be achieved by opening doors, windows, or vents to allow fresh air into a room. In general, ventilation allows for better indoor air quality, as it helps reduce the concentration of pollutants, allergens, and other harmful substances that can cause illness. It also improves the comfort and safety of occupants in enclosed spaces, such as homes and offices.