18
INSTALLER
USER
MAINTENANCE TECHNICIAN
TECHNICAL DATA
1.13 TABLES OF RESISTANCE FACTORS AND EQUIVALENT LENGTHS.
TYPE OF DUCT
Resistance
Factor
(R)
Equivalent length
in m of concentric
pipe
Ø 60/100
Equivalent length
in m of concentric
pipe
Ø 80/125
Equivalent length
in m of pipe
Ø 80
Concentric pipe Ø 60/100 m 1
Intake and
Exhaust 16.5
m 1 m 2.8
Intake m 7.1
Exhaust m 5.5
Concentric bend 90° Ø 60/100
Intake and
Exhaust 21
m 1.3 m 3.5
Intake m 9.1
Exhaust m 7.0
Concentric bend 45° Ø 60/100
Intake and
Exhaust 16.5
m 1 m 2.8
Intake m 7.1
Exhaust m 5.5
Terminal complete with
intake-exhaust horizontal
concentric Ø 60/100
Intake and
Exhaust 46
m 2.8 m 7.6
Intake m 20
Exhaust m 15
Intake-exhaust terminal
horizontal concentric Ø 60/100
Intake and
Exhaust 32
m 1.9 m 5.3
Intake m 14
Exhaust m 10.6
Intake-exhaust terminal
vertical concentric Ø 60/100
Intake and
Exhaust 41.7
m 2.5 m 7
Intake m 18
Exhaust 14
Concentric pipe 80/125 Ø m 1
Intake and
Exhaust 6
m 0.4 1.0 m
Intake m 2.6
Exhaust m 2.0
Concentric bend 90° 80/125 Ø
Intake and
Exhaust 7.5
m 0.5 m 1.3
Intake m 3.3
Exhaust m 2.5
Concentric bend 45° Ø 80/125
Intake and
Exhaust 6
m 0.4 1.0 m
Intake m 2.6
Exhaust m 2.0
Terminal complete with in-
take-exhaust vertical concentric
Ø 80/125
Intake and
Exhaust 33
m 2.0 m 5.5
Intake m 14.3
Exhaust m 11.0
Intake-exhaust terminal
vertical concentric Ø 80/125
Intake and
Exhaust 26.5
m 1.6 m 4.4
Intake m 11.5
Exhaust m 8.8
Terminal complete with intake-ex-
haust horizontal concentric
Ø 80/125
Intake and
Exhaust 39
m 2.3 m 6.5
Intake m 16.9
Exhaust m 13
Intake-exhaust terminal
horizontal concentric Ø 80/125
Intake and
Exhaust 34
m 2.0 m 5.6
Intake m 14.8
Exhaust m 11.3
Concentric adapter from Ø 60/100
to Ø 80/125 with condensate trap
Intake and
Exhaust 13
m 0.8 m 2.2
Intake m 5.6
Exhaust m 4.3
Concentric adapter from
Ø 60/100 to Ø 80/125
Intake and
Exhaust 2
m 0.1 m 0.3
Intake m 0.8
Exhaust m 0.6
Pipe Ø 80 m 1 (with and without
insulation)
Intake 2.3 m 0.1 m 0.4 Intake m 1.0
Exhaust 3 m 0.2 m 0.5 Exhaust m 1.0
Complete intake terminal Ø 80 m 1
(with or without insulation)
Intake 5 m 0.3 m 0.8 Intake m 2.2
Complete intake terminal Ø 80 m 1
(with or without insulation)
Intake 3 m 0.2 m 0.5 Intake m 1.3
Exhaust 2.5 m 0.1 m 0.4 Exhaust m 0.8
Bend 90° Ø 80
Intake 5 m 0.3 m 0.8 Intake m 2.2
Exhaust 6.5 m 0.4 m 1.1 Exhaust m 2.1
Bend 45° Ø 80
Intake 3 m 0.2 m 0.5 Intake m 1.3
Exhaust 4 m 0.2 m 0.6 Exhaust m 1.3
Divided parallel Ø 80
from Ø 60/100 to Ø 80/80
Intake and
Exhaust 8.8
m 0.5 m 1.5
Intake m 3.8
Exhaust m 2.9
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