Superb video sir, i would like to request if you can please make a same demonstration for round ducts also. Thanks in advance 💓.
@MEPAcademy
Жыл бұрын
Thanks for the suggestion.
@Aj-cd1in
Жыл бұрын
Where did the 144 come from
@MEPAcademy
Жыл бұрын
There are 144 in2 in a square foot. 12" x 12" = 144 in2
@katuraysalad
Жыл бұрын
Great video ❤. Very informative
@MEPAcademy
Жыл бұрын
Glad it was helpful! Thanks for watching.
@jw261989
Ай бұрын
Can you help me with this 12 x12 duct 2000CFM what is the FPM ?
@MEPAcademy
Ай бұрын
First you determine the area of the duct, which in your case is 12" x 12" = 144 in2. Then you need to convert this to feet as we're looking for "Feet per Minute). 144 in2 / 144 in2/Ft2 = 1 Ft2. The normal formula is Velocity x Area = CFM, so we just work backwards taking the 2,000 CFM dividing it by the 1 Ft2 = 2,000 FPM of Velocity. To check your self put the values back into the original formula of 2,000 FPM x 1 Ft2 = 2,000 CFM. Hope that helps.
@germanarci8477
4 ай бұрын
new on ventilation... why wouldn't we always choose the smaller diameter to get the highest velocity on the duct?
@MEPAcademy
4 ай бұрын
Higher velocities for the same volume CFM will cause the fan to work harder, causing an increase in energy consumption.
@miguelh.maci1148
6 ай бұрын
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?
@MEPAcademy
6 ай бұрын
Gross area would be 8" x 12" = 96 in2 x 75% free area = 72 in2 / 144 in2/ft2 = 0.5 ft2 x 300 FPM = 150 CFM
@ncameron7
Жыл бұрын
Great video!
@MEPAcademy
Жыл бұрын
Thank you
@michaelmaclachlan2152
9 ай бұрын
Great video! Thanks!
@MEPAcademy
9 ай бұрын
Glad you liked it! Thanks for watching.
@user-xt2jx1fr1z
10 ай бұрын
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!
@MEPAcademy
10 ай бұрын
Good luck. Thanks for watching.
@williamsalaam1112
Жыл бұрын
Where 144 in2 come from?
@MEPAcademy
Жыл бұрын
12 inches x 12 inches = 144 in2. This is equivalent to 1 square foot.
@jeffpeast01
5 ай бұрын
Where did the 114 number come from?
@MEPAcademy
5 ай бұрын
144 is the equivalent square inches in a square foot. 144 Sq. Inches = 1 Sq. Ft
@RaydieCagas-bq6kb
7 ай бұрын
how about aircon cfm calculate?
@MEPAcademy
7 ай бұрын
For air conditioning ductwork it's the same calculation. CFM in an air conditioning dict is based on the area of the duct and the velocity. CFM = Velocity x Duct Cross Sectional Area
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