Calculating CFM or Velocity from Area

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In this video we’ll learn how to calculate the Total CFM in a section of ductwork or moving across a coil or other piece of equipment. Then we’ll learn what happens to velocity when we try to reduce our ductwork without reducing or CFM.

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Superb video sir, i would like to request if you can please make a same demonstration for round ducts also.
Thanks in advance 💓.

Behuman
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Can you please help me resolve this question question?An 8x12" register has the velocity of 300 FPM with the free area of 75% what's the quantity of air exiting the register?

miguelh.maci
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new on ventilation... why wouldn't we always choose the smaller diameter to get the highest velocity on the duct?

germanarci
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Can you help me with this 12 x12 duct 2000CFM what is the FPM ?

jw
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szoval a ventilator rpm kell megallapitanom appszolut nem tudom hogy alljak hozza jarmu sebessege 70 ml/h + korulbellul szel sebessege vagy iranya az atmero 120 vagy 127mm 10-12 lapatos turbina ki tud segiteni megkoszonom!

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