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Old 07-29-17, 07:54 AM   #1
SentinelAeon
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Default big fan connected to small tube

Hi,

I have a question regarding fans and connecting them to a tube that is of a smaller diameter than the fan, a good example would be a vacuum, where you get big airflow through a very small tube.

How much airflow is lost when you connect a bigger fan to a smaller tube ? For example 12x12cm fan connected to a 10x10 or 8x8 tube. I am guessing it depends on the power of the fan, for instance vacuum "fan" being 2000W and computer fan being 1 or 2W. Is there a formula to calculate how much is lost ?

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