vacuum ventilation

vacuum ventilation
ventilation of a room or building by the forced extraction of air.

Medical dictionary. 2011.

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  • vacuum ventilation — noun : ventilation using an exhaust fan so that air is drawn in from outside * * * vacuum ventilation, a system in which the vitiated air is drawn out of the space to be ventilated, and is replaced by the fresh air coming in from the outside… …   Useful english dictionary

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  • Crankcase ventilation system — A crankcase ventilation system is a way for gases to escape in a controlled manner from the crankcase of an internal combustion engine. A common type of such system is a positive crankcase ventilation (PCV) system, the heart of which is a PCV… …   Wikipedia

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  • Positive pressure ventilation — The provision of oxygen under pressure by a mechanical respirator, a machine designed to improve the exchange of air between the lungs and the atmosphere. The device is basically designed for administering artificial respiration, especially for a …   Medical dictionary

  • vac|u|um — «VAK yum, VAK yu uhm», noun, plural vac|u|ums or (except for definite 6) vac|u|a, adjective, verb. –n. 1. an empty space without even air in it. 2. an enclosed space from which almost all the air or other gas has been removed …   Useful english dictionary

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