By calculating both straight duct friction loss and fitting loss, they provide the total static pressure needed for proper duct design. Key Data Used in Calculations
you are calculating (e.g., radius elbow, mitered bend, reducer)? What is your airflow rate (CFM) and duct size ?
The volume of air (CFM or L/s) passing through the fitting.
By accurately sizing fans, you prevent over-pressurizing the system, which wastes energy.
Proper sizing prevents noisy systems and ensures adequate air delivery to rooms.
The diameter (round) or height and width (rectangular) of the duct.
Helps ensure that the total pressure does not exceed the capacity of the air handling unit (AHU).
They calculate the pressure loss in inches of water gauge ("wg) or Pascals (Pa) for various round and rectangular fittings.
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