To find the total ESP, you must identify the (the "critical path") where air travels from the fan to the most distant outlet. 1. Calculate Straight Duct Friction Loss Friction loss is typically calculated per 100 feet of duct. Formula :
Tip for Estimation: If you don't have tables, a common estimation method is . esp calculation for duct
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. To find the total ESP, you must identify