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Old 19th September 2010 | 11:27
  #15 (permalink)  
ampclamp
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From: Skating away on the thin ice of a new day.
How does it work? It does not. The OFV just stops whatever air that is in the cabin from getting out (to a degree anyway)

As for the ram air in / out doors...
I actually know someone who thought that the ram air in actually provided the cabin air pressure.
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