Rheem GHE80SU Use & Care Manual page 21

Figure 15. Typical Vertical Power Vent System Installation
Recommended support bracket be
Alternate vertical venting with
exhaust vent turned down -
preferred for cold climates.
Recommended support bracket be
Water Heater
Installation
Straight Exhaust Terminal
Support Bracket
placed on horizontal run
Water Heater
Floor
Exhaust Terminal
Support Bracket
placed on horizontal run
90° Combustion Air
Inlet Terminal with
screen
90° Combustion Air
Inlet Terminal with
Screen
21
Min. of 18" (46 cm)
above roof.
Min. of 12" (30.5 cm)
above anticipated snow
level.
Max. 24" (61 cm) above
roof without additional
support.
Min. of 18" (46 cm)
above roof.
Min. of 12" (30.5 cm)
above anticipated snow
level.
Max. 24" (61 cm) above
roof without additional
support.