Thread: Vents
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Old 07-11-2019, 12:45 AM   #57 (permalink)
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Different to an air curtain then?

We are operating at an overall mechanical efficiency of only four percent… Therefore, we find that if we increase the overall mechanical efficiency to only twelve percent we can take care of everybody. That three-fold increase in the overall efficiency can only be accomplished by redesign. – R. Buckminster Fuller

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