Buderus Logano GB125/22 BE Installation And Service Instructions Manual page 23

Table 12 shows the maximum permissible vent length for the different types of systems.
GB125
Tab. 12 Maximum flue pipe lengths
For installation details see the Installation
Instructions of the different venting systems.
Pipe changes of direction
The overall lengths apply for systems with one elbow.
Every additional elbow (accessory) reduces the maximum
vent length by 3 ft (1 m).
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.
Maximum length of flue pipe, feet (m)
Plastic flue system DN 80/125
HT-K
Boiler size
direct vent
22 17' (5.2 m)
30 17' (5.2 m)
35 17' (5.2 m)
Boiler installation
DO GA-K
vertical vent masonry chimney
51' (17 m) 51' (17 m)
64' (21 m) 64' (21 m)
71' (23 m) 71' (23 m)
5
23