ΔP=Co×Pvcap delta cap P equals cap C sub o cross cap P sub v
: Most design engineers use a standardized Excel sheet for ESP calculations, manually inputting the pressure loss in Pascals or the loss coefficient ( ashrae duct fitting database excel link
For a small firm doing simple residential work, the cost might be hard to justify compared to free online calculators. However, for commercial work where engineering liability is high, the cost is negligible compared to the value of accuracy. ΔP=Co×Pvcap delta cap P equals cap C sub
Select your ASHRAE source file to import the loss coefficient tables into a hidden reference sheet within your workbook. ashrae duct fitting database excel link