Question

For the system shown in Figure, design the ductwork using the equal friction method.

Calculate the system resistance and the total pressure imbalance at the junctions. The airflow rates provided are actual values corrected for heat gains or losses. Assume the ductwork is fully sealed (no leakage). The ducts are galvanized steel with transverse joints spaced at 1200 mm centers (x = 0.09 mm). The air density is 1.204 kg/m². The supply system uses rectangular ducts.