DUCTWORK SPECIFIC PRESSURE LOSS CALCULATION
Ductwork and air properties settings
Ductwork type:
enter roughness
sheet of tin
galvanized sheet
rough dirty sheet
smooth concrete
rough concrete
plastic
Ductwork surface roughness:
__________
m
mm
cm
dm
km
ft
in
mil
yd
Relative humidity:
__________
-
%
Temperature:
__________
°C
K
F
C
Specific density:
__________
kg/m3
kg/dm3
kg/cm3
g/cm3
g/m3
t/m3
g/l
kg/l
lb/gal(UK)
lb/gal(US)
lb/in3
lb/ft3
Ductwork shape selection
Rectangular section
Round cross- section
Dimension rounding selection
Precise dimension
Fine line
Rough line
Ductwork specific pressure loss calculation
Ductwork dimension A, or diameter D:
__________
m
mm
cm
dm
km
ft
in
mil
yd
Ductwork dimension B:
Volume air-flow rate:
__________
m3/s
m3/h
m3/min
l/s
l/h
l/min
ft3/s
ft3/min
ft3/h
Average air-flow velocity:
__________
m/s
m/h
km/h
m/min
ft/s
ft/h
MPH
Specific pressure loss:
__________
Pa/m
kPa/m