Rocks & mirror
Encyclopedia of Marine and Energy Technology



Ventilation is the circulation and refreshing of the air in a space without necessarily a change of temperature. This is generally accomplished by a combination of supply fans, exhaust fans, and ductwork.

- Natural ventilation – Natural ventilation occurs when changes in temperature or air density cause circulation in the space.

- Mechanical ventilation – Forced ventilation. Fans are used for a positive movement of large quantities of air.

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