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MAXIMUM ALLOWABLE PRESSURE DIFF & FLUE LENGTH FLUES INCLUDING TERMINAL
MODEL FLUE SIZE PRESSURE DIFF (Pa)
30/30P 80/125 140
40/40P 80/125 225
60/60P
80/125 150
100/150 150
80/80P 80/125 312
100 100/150 220
120 100/150 365
150 100/150 430
Therefore this installation is acceptable as only a 2m run.
FOR OWN BUILT OPEN FLUE USE THIS:
EXAMPLE 1 (CONCENTRIC)
HORIZONTAL FLUE FOR EVOMAX 40
Resistance (m)
Flue size 80/125
Max permissible flue run 42
2 x 90˚ elbow 2 x 1.6 = 3.2
Total flue length available 42 - 3.2 = 38.8
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