In latin: ventilare means to 'expose to the wind'.
In medicine: the exchange of oxygen and carbon dioxide in our lungs, i.e. 'breathing'.
Today: it means to bring in outdoor air and replace indoor air of the occupied space, i.e. the act and/or the installation:
- the act or process of ventilating or the state of being ventilated, or
- an installation in a building that provides a supply of fresh air.
What is ventilation?
Proper ventilation is essential for breathing, as the oxygen level is gradually reduced in an inhabited area, thus removal or dilution of air pollutants, smoke and odor, controlling humidity and temperature within the space being used is required.
The ventilation process is comprised of the exchange of air between the inside and outside environment of a designated space, as well as internal circulation within the space. It is achieved naturally through openings or mechanically by using various types of fans.
Ventilation that involves heat exchange, humidity control or purification are complicated mechanical procedures.