Common tools for this include digital apps from industry leaders like Price Industries or online calculators. If you can tell me:
The diameter (round) or height and width (rectangular) of the duct.
They calculate the pressure loss in inches of water gauge ("wg) or Pascals (Pa) for various round and rectangular fittings. duct fitting loss calculator
Helps ensure that the total pressure does not exceed the capacity of the air handling unit (AHU).
The speed of the air (FPM or m/s), which directly affects friction. Common tools for this include digital apps from
The calculator converts the resistance of a fitting into an equivalent length of straight duct, allowing for easier total pressure calculations.
I can help walk you through the calculation or direct you to a specific tool. Duct Pressure Loss Calculator | Plastec Ventilation Helps ensure that the total pressure does not
you are calculating (e.g., radius elbow, mitered bend, reducer)? What is your airflow rate (CFM) and duct size ?