Air Duct Pressure Loss Calculation

Air ducts are enclosed conduits used in heating, ventilation, and air conditioning (HVAC) systems to distribute fresh air into indoor spaces and remove contaminated air from the environment. Depending on factors such as duct material, airflow rate, velocity, and installation conditions, ducts can be selected as round, rectangular, oval, or flexible types.

Properly sized air ducts are critical for achieving low pressure loss, quiet operation, energy efficiency, and overall indoor comfort. This page provides information on the application areas and advantages of different duct types, as well as the fundamental engineering parameters that should be considered during duct design.