HVAC Duct Pressure Loss Calculator

Calculate pressure drop in rectangular and circular HVAC ducts using friction and dynamic loss coefficients per ASHRAE standards

Each component has a specific meaning:

• Friction — The friction recorded for the patient or scenario being assessed.
• Dynamic loss coefficients per ASHRAE standards — The dynamic loss coefficients per ashrae standards recorded for the patient or scenario being assessed.

Note: Interpret the duct pressure loss result against the clinical thresholds and context described above.

Enter the friction, dynamic loss coefficients per ASHRAE standards for the patient or scenario you are assessing. Calculate pressure drop in rectangular and circular HVAC ducts using friction and dynamic loss coefficients per ASHRAE standards. Use the duct pressure loss result to inform your clinical assessment.