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ventilation opening

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  • Ventilation (firefighting) — In firefighting, ventilation refers to the tactic of creating a draft with an opening above or opposite the entry point so that heat and smoke will be released, permitting the firefighters to find and attack the fire. If a large fire is not… …   Wikipedia

  • ventilation — I (Roget s IV) n. 1. [The act of providing or changing air] Syn. airing, purifying, oxygenating, freshening, opening windows, changing air, circuLating air, air conditioning. 2. [Fresh air] Syn. pure air, purified air, freshened air, oxygenated… …   English dictionary for students

  • Natural ventilation — The ventilation system of a regular earthship. Natural ventilation is the process of supplying and removing air through an indoor space without using mechanical systems. It refers to the flow of external air to an indoor space as a result of wind …   Wikipedia

  • Modes of mechanical ventilation — Contents 1 Positive and negative pressure ventilation 1.1 Negative pressure ventilation 1.1.1 Types of negat …   Wikipedia

  • High frequency ventilation — is a type of mechanical ventilation that employs very high respiratory rates (>60 breaths per minute) and very small tidal volumes (usually below anatomical dead space).cite journal |author=Krishnan JA, Brower RG |title=High frequency ventilation …   Wikipedia

  • Mechanical ventilation — In architecture and climate control, mechanical or forced ventilation is the use of powered equipment, e.g. fans and blowers, to move air  see ventilation (architecture). Mechanical ventilation Intervention …   Wikipedia

  • 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

  • Heat recovery ventilation — (also known as a heat exchanger, air exchanger or air to air exchanger) is a ventilation system that employs a counter flow heat exchanger between the inbound and outbound air flow. HRV provide fresh air and improved climate control, while also… …   Wikipedia

  • Heritage Woods Secondary School — Infobox Education in Canada name= Heritage Woods Secondary School imagesize= motto= motto translation= streetaddress= 1300 David Avenue city= Port Moody province= British Columbia postalcode= V3H 5K6 coordinates=… …   Wikipedia

  • Extended Cold Weather Clothing System — The Extended Cold Weather Clothing System (ECWCS; pronounced EK wax ) is a protective clothing system developed in the 1980s by the United States Army Natick Soldier Research, Development and Engineering Center, Natick, Massachusetts. The first… …   Wikipedia

  • tunnels and underground excavations — ▪ engineering Introduction        Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …   Universalium

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