HVAC Screen Pressure Drop
The following is a typical HVAC screen pressure drop graph.
Adapted from HVAC Systems Duct Design, Third Edition, 1990, Sheet Metal & Air Conditioning Contractor’s National Association
ASHRAEPressure drop estimation equation:
Q = 2610 * A * dP.5
Q is flow in cfm
A is open area in ft2
dP is pressure drop across the restriction, in. w.c.
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