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Bosch C 1210 ES/ESC Manual page 17

Natural gas liquefied petroleum gas indoor residential and commercial models
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4.3.3 Vent configuration examples
Below are approved examples of vertical and horizontal venting
installations.
Fig. 11 Vertical venting system (single pipe penetration)
[1]
Drain tee
[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. 12 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
C 1210 ES/ESC
WARNING:
▶ Single pipe penetration should be used in non-
freezing climates only and steps must be taken to
ensure that adequate combustion air is available to
the water heater at all times!
Fig. 13 Horizontal venting system (concentric vent)
[1]
Exhaust
[2]
Combustion air
[3]
Exhaust pipe
[4]
Drain tee
[5]
Intake pipe
[LA] Minimum 1"
Fig. 14 Horizontal parallel venting system (twin pipe direct vent)
[A]
3 ft minimum
Installation instructions | 17
6 720 644 887 (2013/02)

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