Resistance factor and equivalent length tables.
TYPE OF DUCT
Resistance
factor
(R)
Equivalent length
in metres of
concentric pipe
Ø 60/100
Equivalent
length in metres
of pipe
Ø 60
Concentric pipe Ø 60/100 length 1 m
90° bend concentric Ø 60/100
45° bend concentric Ø 60/100
Terminal complete with concentric
horizontal intake-exhaust Ø 60/100
Intake
and
exhaust
6.4
1 m
Intake
and
exhaust
8.2
1.3 m
Intake
and
exhaust
6.4
1 m
Intake
and
exhaust
15
2.3 m
Intake
and
exhaust
16.3
2.5 m
Exhaust
1.9 m
Exhaust
2.5 m
Exhaust
1.9 m
Exhaust
4.5 m
Exhaust
3.0 m
1.5 m
Intake
and
exhaust
10
Terminal complete with concentric
horizontal intake-exhaust Ø 60/100
Intake
and
exhaust
9
1.4 m
Intake
and
exhaust
5.2
0.8 m
Equivalent
length in metres
of pipe
Ø 80
Terminal complete with concentric
vertical intake-exhaust Ø 60/100
Concentric adapter from Ø 80/125 to 60/100
Terminal complete with concentric
vertical intake-exhaust Ø 60/100
Intake
7.3 m
Intake
9.4 m
Intake
7.3 m
Intake
17.2 m
Intake
18.7 m
Exhaust
5.3 m
Exhaust
6.8 m
Exhaust
5.3 m
Intake
11.5 m
Exhaust
12.5 m
Exhaust
8.3 m
Exhaust
13.6 m
Exhaust
1.6 m
Intake
6.0 m
Exhaust
4.3 m
Exhaust
4.9 m
Exhaust
2.7 m
Intake
10.3 m
Exhaust
7.5 m
Concentric flange Ø 80/125
Intake
and
exhaust
1.3
0.2 m
Exhaust
0.4 m
Intake
1.5 m
Exhaust
1.1 m
Pipe Ø 80 length 1 m
Intake
1.0 m
Exhaust
1.0 m
Exhaust
0.4 m
0.1 m
0.2 m
Intake
0.87
Exhaust
1.2
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TECHNICIAN
9
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TECHNICIAN
