Total Static Pressure Calculator

Calculate total external static pressure for AHU fan selection from duct and component losses.

Total duct friction losses (supply + return).
in WC
Total fitting losses.
in WC
Filter pressure drop at dirty condition.
in WC
Cooling/heating coil pressure drop.
in WC
Supply diffuser and return grille losses.
in WC
Other losses (dampers, silencers, etc.).
in WC

Results

Total Static Pressure-in WC
With 10% Safety Factor-in WC
References: ASHRAE Handbook—Fundamentals Ch. 21; SMACNA HVAC Duct Construction Standards