TRUE PARTNERS NCC Section J Duct Calculator
Duct Size Calculator based on NCC Section J
   
       
VOLUME FLOW
L/s
   
       
Air Temperature °C    
       
Air Relative Humidity %    
         
Pressure Drop Pa/m  
One side / Axis (Oval) mm

Velocity (m/s)
RectangularOther Side Length (mm)
Round Duct DIA (mm)
Oblong (Oval) other Axis (mm)