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Bosch C 950 Installation Manual page 17

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4.3.3
Vent configuration examples for PP, PVC, CPVC, or ABS
systems
Below are approved examples of vertical and horizontal venting
installations.
Fig. 12 PP concentric kit venting
NOTICE: Using a single pipe vent in cold climates puts
the water heater at risk of freezing, as negative air
pressure is common in buildings during cold weather.
This situation will pull cold air through the heat
exchanger and can lead to damage and a water leak.
Freeze damage to the water heater is not covered under
warranty.
Greentherm
Fig. 13 Vertical venting system (single pipe penetration)
[1]
Drain tee (when required)
[2]
Intake
[3]
Exhaust
[LA] Maintain 12 in. (18 in. for Canada) minimum clearance above
highest anticipated snow level maximum of 24 in. above roof.
Fig. 14 Horizontal venting installation (combustion air piping not
shown)
[1]
Termination
[2]
Minimum above ground or normally expected snow accumulation
level
[3]
Appliance
[4]
Elbow (note: minimum 1ft of straight vent pipe required)
[5]
Horizontal run ¼ " per foot down to termination
Installation instructions | 17
6 720 805 440 (2014/11)

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