Esp Calculation For Duct Upd Jun 2026

is the total pressure resistance the air handling unit (AHU) or fan must overcome to push air through the ductwork, fittings, and terminal devices located outside of the unit itself.

Understanding and calculating is vital for selecting the right fan or Air Handling Unit (AHU). Think of ESP as the total resistance air encounters while traveling through every component of your ductwork—from the straight runs to the smallest fittings. What is External Static Pressure (ESP)? esp calculation for duct

( ESP = \sum (\textFriction Loss) + \sum (C \cdot P_v) + \sum (\textDevice Losses) ) is the total pressure resistance the air handling