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1.13 TABLES OF RESISTANCE FACTORS AND EQUIVALENT LENGTHS OF “GREEN RANGE” FLUE
SYSTEM COMPONENTS
TYPE OF DUCT
Resistance
factor
(R)
Equivalent
length
in m of concentric
pipe Ø 80/125
Concentric pipe 80/125 Ø m 1
2,1
1
90° concentric bend 80/125 Ø
3,0
1,4
Concentric bend 45° Ø 80/125
2,1
1
Terminal complete with concentric horizontal intake-exhaust
Ø 80/125
2,8
1,3
Terminal complete with concentric vertical intake-exhaust
Ø 80/125
3,6
1,7
90° concentric bend Ø 80/125 with inspection
3,4
1,6
Stub pipe with inspection Ø 80/125
3,4
1,6
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