Ventilation

Ventilation is air circulation of air, typically between a room, a tunnel, etc., and the air outside. When people or animals are present, ventilation is especially necessary to remove the carbon dioxide produced and renew the oxygen used up. It is needed additionally if pollution takes place, e.g. by smoking, painting, etc. Ventilation may also refer to a closed system, such as an airliner, where "stale" air is filtered, mixed with oxygen, temperature-adjusted, and recirculated back to the cabin.

Related Topics:
Air - Tunnel - Carbon dioxide - Oxygen - Smoking - Painting

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Its belived that bad ventilation can cause alergy, head ache, throat problems.

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If there is something burning (a fireplace, gas heater, candle, oil lamp, etc.) more oxygen is replaced by carbon dioxide (and possibly other poisonous gases and smoke) and more ventilation is needed. If there is a chimney then the additional need of ventilation just refers to replacing the warmer air that leaves by convection through the chimney with fresh air.

Related Topics:
Burning - Fireplace - Gas heater - Candle - Oil lamp - Poisonous - Gas - Smoke - Chimney - Convection

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Ventilation in a structure is also needed for removing water vapor, produced by breathing, burning, and cooking, and for removing smells, e.g. from a toilet or kitchen. If water vapor is permitted to accumulate, it may damage the insulation or interior finish. A dehumidifier may also be appropriate for removing moisture in the air.

Related Topics:
Water vapor - Breathing - Cooking - Toilet - Kitchen - Insulation - Dehumidifier

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