HVAC Screen Pressure Drop

HVAC Systems & Components

The following is a typical HVAC screen pressure drop graph.

Face Area Velocity

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.