2-3-8 Installing flue (Flue Options - Horizontal Flue Systems)
Twin & Vertical Flue Systems
1. Maximum permissible equivalent flue lengths are:-
2. Any additional " in line" bends in the flue system must be taken into consideration
Their equivalent lengths are:-
Concentric Pipes:
Twin Flue Pipe
130 bend
0.5 meters
135 bend
0.25 meters
93 bend
1.0 meters
91.5 bend
0.50 meters
The elbow supplied with the standard horizontal telescopic flue kit is not included any equivalent length
calculations
20 meters
Vertical Concentric
Vertical Twin Pipe
15 meters
10 meters
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