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Resistance Factors and Equivalent Lengths Table
DUCT TYPE
Concentric pipe Ø 60/100 m 1
90° bend concentric Ø 60/100
45° bend concentric Ø 60/100
Terminal complete with concentric
horizontal intake-exhaust Ø 60/100
Terminal complete with concentric
horizontal intake-exhaust Ø 60/100
Terminal complete with concentric
vertical intake-exhaust Ø 60/100
Concentric pipe Ø 80/125 m 1
90° bend concentric Ø 80/125
45 bend concentric Ø 80/125
Terminal complete with concentric horizontal
intake-exhaust Ø 80/125
Terminal complete with concentric
horizontal intake-exhaust Ø 80/125
Terminal complete with concentric
horizontal intake-exhaust Ø 80/125
Terminal complete with concentric
horizontal intake-exhaust Ø 80/125
Concentric adapter from Ø 60/100
to Ø 80/125 with condensate collector
Concentric adapter from
Ø 60/100 to Ø 80/125
Pipe Ø 80, 1 m (with or without insulation)
Complete pipe terminal Ø 80, 1 m
(with or without insulation)
Intake terminal Ø 80
Exhaust terminal Ø 80
Bend 90° Ø 80
Bend 45° Ø 80
Split parallel Ø 80
from Ø 60/100 to Ø 80/80
IE
Equivalent length
in meter of concentric pipe
Resistance
Ø 60/100
Factor
(R)
Intake and
m 1
Exhaust 16,5
Intake and
m 1,3
Exhaust 21
Intake and
m 1
Exhaust 16,5
Intake and
m 2,8
Exhaust 46
Intake and
m 1,9
Exhaust 32
Intake and
m 2,5
Exhaust 41,7
Intake and
m 0,4
Exhaust 6
Intake and
m 0,5
Exhaust 7,5
Intake and
m 0,4
Exhaust 6
Intake and
m 2,0
Exhaust 33
Intake and
m 1,6
Exhaust 26,5
Intake and
m 2,3
Exhaust 39
Intake and
m 2,0
Exhaust 34
Intake and
m 0,8
Exhaust 13
Intake and
m 0,1
Exhaust 2
Intake 2,3
m 0,1
Exhaust 3
m 0,2
Intake 5
m 0,3
Intake 3
m 0,2
Exhaust 2,5
m 0,1
Intake 5
m 0,3
Exhaust 6,5
m 0,4
Intake 3
m 0,2
Exhaust 4
m 0,2
Intake and
m 0,5
Exhaust 8,8
121
Equivalent length
in meter of concentric pipe
Ø 80/125
m 2,8
m 3,5
m 2,8
m 7,6
m 5,3
m 7
m 1,0
m 1,3
m 1,0
m 5,5
m 4,4
m 6,5
m 5,6
m 2,2
m 0,3
m 0,4
m 0,5
m 0,8
m 0,5
m 0,4
m 0,8
m 1,1
m 0,5
m 0,6
m 1,5
Equivalent length
in metres of pipe
Ø 80
Intake m 7,1
Exhaust m 5,5
Intake m 9,1
Exhaust m 7,0
Intake m 7,1
Exhaust m 5,5
Intake m 20
Exhaust m 15
Intake m 14
Exhaust m 10,6
Intake m 18
Exhaust m 14
Intake m 2,6
Exhaust m 2,0
Intake m 3,3
Exhaust m 2,5
Intake m 2,6
Exhaust m 2,0
Intake m 14,3
Exhaust m 11,0
Intake m 11,5
Exhaust m 8,8
Intake m 16,9
Exhaust m 13
Intake m 14,8
Exhaust m 11,3
Intake m 5,6
Exhaust m 4,3
Intake m 0,8
Exhaust m 0,6
Intake m 1,0
Exhaust m 1,0
Intake m 2,2
Intake m 1,3
Exhaust m 0,8
Intake m 2,2
Exhaust m 2,1
Intake m 1,3
Exhaust m 1,3
Intake m 3,8
Exhaust m 2,9
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