how to calculate cfm and air changes?
V1+V2+V3+V4+V5
Average velocity (V) = --------------------------- = _______Ft. / min.
5
Area of grill (A) = Length in ft. X Breadth in ft. = ________ Sq. Ft.
Air flow per grill (F) = V X A = ________CFM.
Air flow of the Room (T) = ___________CFM
Room Volume ® = __________Cu. Ft.
T X 60
No. of Air Changes / hour (ACPH) (N) = ----------
R
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thanku sir for your valuable reply
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well come
What is cfm & its significance?
cfm is cubic feet per min.
blower cacacity of AHU is in cfm which then decides air changes.
Is this equation to calculate dryer air or atmosphere air?
AHU air