Abstract
Ventilation is defined as the process of supplying air to, or removing it from, any enclosed space by natural or mechanical means. Such air may or may not be conditioned. There are at least five effects resulting from human occupancy of unventilated or poorly ventilated rooms: (1) a decrease in the oxygen content in air; (2) an increase in the carbon dioxide content in air; (3) a release of odor-causing organic compounds from the skin, clothing, and mouths of the occupants; (4) an increase in humidity owing to the moisture in the breath and evaporation from the skin; and (5) an increase in the room temperature owing to the heat generated in the body processes [1].
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