Rheem GHE100-130 Use & Care Manual page 11

Note: Vent pipe size should not be mixed for venting these units. Use same size pipe fo all venting of the unit.
NOTICE: Vent terminals need to be mounted horizontally a minimum of 24 inches (center to center) horizontally apart and a maximum of 36 inches
apart (center to center) See Figure 12 for venting multiple units.
Power Direct Vent
Model Maximum Vent Length for Inlet or
Outlet ( ft. )
*GHE100-130
GHE100-160
GHE100-200
GHE100-250
GHE100-300
GHE100-350
For each 90° elbow, reduce pipe length by five ( 5 ) feet.
For each 45° elbow, reduce pipe length by five ( 2.5 ) feet.
Example of Venting for 2" Power Direct Vent Setup :
Refer to the chart above, " Power Direct Vent", for actual vent
length allowed on each model.
Number of 90° Elbows Number of
excluding Vent Terminals 45° Elbows
Inlet Vent Outlet Vent
None None
One ( 1 ) One ( 1 )
One ( 1 ) One ( 1 ) One ( 1 )
Two ( 2 ) Two ( 2 )
Two ( 2 ) Two ( 2 ) One ( 1 )
Three ( 3 ) Three ( 3 )
Three ( 3 ) Three ( 3 ) One ( 1 )
*NOTICE: The GHE Prefix on the model numbers above can also be THE.
DO NOT exceed the venting distances or the number of elbows listed in this manual.
Exceeding the maximum lengths may cause the water heater to malfunction or cause a lock-
out condition.
installation
miNimUm AND mAximUm VENT lENgThS
Vent Pipe Size ( In. )
2 3 4
20 60 85
20 50 75
20 40 65
n/a 40 65
n/a 40 40
n/a 40 40
Minimum Maxi-
Pipe mum
Length Pipe
Required Length
(ft) (ft)
None 5.0 20.0
None ----- 15.0
----- 12.5
None ----- 10.0
----- 7.5
None ----- 5.0
----- 2.5
TABLE 1.
Vent Pipe Size ( In. )
Model Maximum Vent Length for Outlet ( ft. )
GHE100-130
GHE100-160
GHE100-200
GHE100-250
GHE100-300
GHE100-350
For each 90° elbow, reduce pipe length by five ( 5 ) feet.
For each 45° elbow, reduce pipe length by five ( 2.5 ) feet.
Example of Venting for a 4" Power Vent Setup (GHE100-130)
Refer to the chart above, " Power Vent", for actual vent length
allowed on each model.
Number of 90° Elbows,
excluding Vent Terminals
Outlet Vent
None
One ( 1 )
One ( 1 )
Two ( 2 )
Two ( 2 )
Three ( 3 )
Three ( 3 )
Four ( 4 )
Four ( 4 )
Five ( 5 )
11
Power Vent
2 3
20 60 85
20 50 75
20 40 65
n/a 40 65
n/a 40 40
n/a 40 40
Number Minimum Maxi-
of 45 ° Pipe mum
Elbows Length Pipe
Required Length
(ft) (ft)
None 5.0 85.0
None ----- 80.0
One ( 1 ) ----- 77.5
None ----- 75.0
One ( 1 ) ----- 72.5
None ----- 70.0
One ( 1 ) ----- 67.5
None ----- 65.0
One ( 1 ) ----- 62.5
None ----- 60.0
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