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1.13 TABLES OF EQUIVALENT LENGTH FACTORS.
DUCT TYPE
Equivalent length in
metres of pipe 80 Ø
Pipe 80 Ø, 1 m
Exhaust
1.0 m
Complete exhaust terminal 80 Ø, 1 m
Exhaust
2.6 m
Exhaust terminal 80 Ø
Exhaust
1.6 m
Bend 90° 80 Ø
Exhaust
2.1 m
Bend 45° 80 Ø
Exhaust
1.3 m
Terminal complete with vertical ex-
haust 80 Ø
Exhaust
m
3
DUCT TYPE
Equivalent length in
m of concentric pipe
80/125 Ø
Concentric pipe 80/125 Ø m 1
1.0 m
Concentric bend 90° 80/125 Ø
1.9 m
Concentric bend 45° 80/125 Ø
1.4 m
Terminal complete with concentric
horizontal intake-exhaust 80/125 Ø
5.5 m
Concentric horizontal intake-exhaust
terminal 80/125 Ø
4.7 m
Terminal complete with concentric verti-
cal intake-exhaust 80/125 Ø
3.4 m
Concentric vertical intake-exhaust
terminal 80/125 Ø
2.7 m
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