20
INS
TALLER
U
SER
M
AINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
TYPE OF DUCT
Resistance
factor
(R)
Equivalent
length in m
of concentric pipe
Ø 60/100
Equivalent
length in m
of pipe Ø 80
Equivalent
length in m
of concentric pipe
Ø 80/125
Concentric pipe
Ø 60/100 m 1
Intake m 17.9
m 1
Intake m 7.3
m 3,0
Exhaust m 17.9
Exhaust m 5.3
90° concentric bend
Ø 60/100
Intake m 23.0
m 1,3
Intake m 9.4
m 3,9
Exhaust m 23.0
Exhaust m 6.8
45° concentric bend
Ø 60/100
Intake m 17.9
m 1
Intake m 7.3
m 3
Exhaust m 17.9
Exhaust m 5.3
Terminal complete
with concentric
horizontal inta-
ke-exhaust Ø 60/100
Intake m 42
m 2,3
Intake m 17.2
m 7,1
Exhaust m 42
Exhaust m 12.5
Concentric horizontal
intake- exhaust
terminal Ø 60/100
Intake m 28
m 1,5
Intake m 11.5
m 4,7
Exhaust m 28
Exhaust m 8.3
Terminal complete
with concentric
vertical inta-
ke-exhaust Ø 60/100
Intake m 45.6
m 2,5
Intake m 18.7
m 7,7
Exhaust m 45.6
Exhaust m 13.6
Concentric vertical
intake-exhaust
terminal Ø 60/100
Intake m 25.2
m 1,4
Intake m 10.3
m 4,3
Exhaust m 25.2
Exhaust m 7.5
Pipe Ø 80 m 1
Intake m 2.4
m 0,1
Intake m 1
m 0,4
Exhaust m 3.4
m 0,2
Exhaust m 1
m 0,5
Complete intake
terminal Ø 80 m 1
Intake m 8.4
m 0,5
Intake m 3.4
m 1,4
Intake terminal Ø 80
Exhaust terminal Ø 80
Intake m 6.2
m 0,35
Intake m 2.5
m 1
Exhaust m 5.3
m 0,3
Exhaust m 1.6
m 0,9
90° bend Ø 80
Intake m 5.3
m 0,3
Intake m 2.2
m 0,9
Exhaust m 7.3
m 0,4
Exhaust m 2.1
m 1,2
45° bend Ø 80
Intake m 3.4
m 0,2
Intake m 1.4
m 0,5
Exhaust m 4.5
m 0,25
Exhaust m 1.3
m 0,7
Reduction Ø 80/60
Intake m 7.3
m 0,4
Intake m 3
m 1,2
Exhaust m 7.3
Exhaust m 2.1
