Calculating Duct Resistance
Figure 36
Fitting
Dia.
90˚
Elbow
45˚
Elbow
45˚
Wye(Y)
90˚
Wye(Y)
Duct
Dia.
Approximate
Static Pressure
Loss Per Foot of
Rigid Pipe
Approximate
Static Pressure
Loss Per Foot
of Flex Pipe
Figure 36.
Additional Factors Static Pressure Loss
Figure 34
To calculate the static pressure loss of any
given line in the system, follow these steps:
1.
Figure 36
2.
Figure 36
3. Figure 37
Figure 37.
