Buderus Logamax plus GB142-24 Installation And Servicing Instructions page 22

6 Installation
See table 4 for the Friction Loss Equivalent in piping and
fittings.
Example:
When you end up using 3 x 45°-elbows and the concen-
tric vent kit, then the total venting length may not exceed
88 feet (26.82 m) (GB142-24/30/45) or 48 feet (14.63 m)
(GB142-60).
3 x 45°-elbow = 3 x 3 ft (0.91 m)=
concentric vent kit =
Total friction loss equivalent =
Total venting length for this example is:
GB142-24/30/45 = 100 ft (30.48 m) - 12 ft (3.66 m)=
88 feet (26.82 m)
GB142-60 = 60 ft (18.29) - 12 ft (3.66 m) =
48 feet (14.63 m).
NOTICE
The minimum covering wall thickness is 1". The
maximum covering wall thickness is 16".
We reserve the right to make any changes due to technical modifications!
22
9 ft (2.73 m)
3 ft (0.91 m)
12 ft (3.66 m)
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Fittings or Piping
45 degree elbow
90 degree elbow
plastic pipe per foot
concentric vent kit
Table 4 Friction Loss Equivalent in piping and fittings
Buderus Hydronic Systems • http://www.buderus.net
Equivalent
feet m
3 0.91
5 1.52
1 0.30
3 0.91