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Bosch Greentherm T9900 SE 160 Installation And Operating Instructions Manual page 29

Indoor residential tankless water heaters, 160 000/199 000 btu- natural gas 160 000/199 000 btu - liquefied petroleum lp gas
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Fig. 15
Horizontal venting installation air intake piping not
[1] Termination
[2] Water heater
[3] Elbow
[4] Horizontal run should slope ¼" per foot upwards to water
[LA] 12 inches (305 mm) (18 in. for Canada) above maximum
snow level or at least 24 inches (610 mm), whichever is
▶ Place pipe supports every 5 feet (1525mm) of horizontal
and vertical run, beginning with support near water heater.
▶ Periodic cleaning of the vent terminal and air intake screens
is mandatory.
▶ Avoid locating vent terminals near equipment, vegetation,
plants or building features which can be subject to
degradation from exhaust gases.
Greentherm T9900 SE/i – 6 720 813 635 (2019/03)
Fig. 16
Horizontal venting system (sealed combustion)
[1] Intake
[2] Exhaust
Fig. 17
Vent and air intake pipe position of a sealed
combustion system
[1] Intake
[2] Exhaust
[X] At least 1foot (305mm)
Installation instructions



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Greentherm t9900 se 199Greentherm t9900 se/i 199