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6
Installation
10"-0" MIN
(250 mm - 0 mm MIN)
Exhaust
Fig. 28 Vertical venting system (sealed combustion)
Do not exceed the total equivalent venting length of 100 feet
(30,480 mm) maximum requirement each for the intake and
exhaust piping.
NOTICE
Appliance input rates are based on minimum
vent length operation. Longer vent lengths
(up to maximum) will reduce the input propor-
tionally.
See table 5 for the Friction Loss Equivalent in piping and
fittings.
Example:
When you end up using 3 x 45°-elbows and the concentric
roof terminal, then the total venting length may not exceed
68 feet (20.72 m).
3 x 45°-elbow = 3 x 4 ft (1.22 m) =
concentric roof terminal 4"/6" =
Total friction loss equivalent =
Total venting length for this example is:
GB162-80 kW/100 kW = 100 ft (30.48 m) - 32 ft (9.76 m) =
68 ft (20.72 m) each for the intake and exhaust piping.
28
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
12" (300 mm) over maximum
snow level or 24" (600 mm)
whichever is greater
Intake
12 ft (3.66 m)
20 ft (6.10 m)
32 ft (9.76 m)
WALL TERMINATION
Fig. 27 Horizontal venting system (sealed combustion) -
Situation 2 (PVC only)
Fittings or Piping
45 degree elbow
90 degree elbow
plastic pipe per foot
parallel vent kit
concentric roof terminal
4"/6" (100/150 mm)
Table 5
Friction Loss Equivalent in piping and fittings
INTAKE (BEHIND)
EXHAUST
Equivalent
feet
m
4
1.22
7
2.13
1
0.30
2
0.61
20
6.10
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