Horizontal venting installation air intake piping not
 Water heater
 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
▶ 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)
Horizontal venting system (sealed combustion)
Vent and air intake pipe position of a sealed
[X] At least 1foot (305mm)