Rheem PowerVent Series Use & Care Manual page 15

Maximum and Minimum Vent Lengths for Residential
40 & 50 Gallon Power Vents ONLY
Minimum vent length for 2"vent pipe is one (1) foot (30.4 cm)of vertical pipe, one (1)
90°elbow, and three (3) feet (0.91 m) of horizontal pipe.
Maximum Venting information for 2" Vents*
Number of 90°
elbows with Vent
Three (3)
* For the 2" vent, one 90° elbow is approximately equal to 6 feet (1.8 m) of vent pipe. One 45°
elbow is approximately equal to 3 feet (0.91 m) of vent pipe.
NOTICE: The mixing of 2" and 3" vent pipe is not recommended. If 3" pipe is used, a 2" to 3"
reducer fitting is recommended at the rubber coupling.
A 2" (5 cm) or 3" (7.6 cm) Schedule 40 PVC 45° vent terminal must be used. Screens for both
2" and 3" vent terminals have been included.
Minimum vent length for 3" vent pipe is one (1) foot (30.4 cm) of vertical pipe, one (1)
90°elbow, and four (4) feet (1.21 m) of horizontal pipe.
Maximum Venting information for 3" Vents**
Number of 90°
elbows with Vent
Three (3)
Three (3)
** For the 3" vent, one 90° elbow is approximately equal to 5 feet (1.52 m) of vent pipe. One 45°
elbow is approximately equal to 2.5 feet (0.76 m) of vent pipe.
Number of
45° Elbows
One (1) None
One (1) One (1)
Two (2) None
Two (2) One (1)
None
Number of
45° Elbows
One (1) None
One (1) One (1)
Two (2) None
Two (2) One (1)
None
One (1)
Four (4) None
Four (4) One (1)
Five (5) None
Maximum Vent Pipe Length in
Feet (ft)
0' - 2,000'
(0 m -609 m)
44' (13 m)
41' (12.5 m)
38' (11.5 m)
35' (10.7 m)
32' (9.8 m)
Maximum Vent Pipe Length in
Feet (ft)
0' - 2,000'
(0 m -609 m)
95' (29 m)
92.5' (28 m)
90' (27.4 m)
87.5' (26.7 m)
85' (26 m)
82.5' (25 m)
80' (24.4 m)
77.5' (24 m)
75' (22.8 m)
Maximum Vent Pipe Length
in Feet (ft)
2,001' (610 m) and above.
24' (7.3 m)
21' (6.4 m)
18' (5.5 m)
15' (4.5 m)
12' (3.6 m)
Maximum Vent Pipe Length
in Feet (ft)
2,001' (610 m) and above.
75' (22.8 m)
72.5' (22.1 m)
70' (21.3 m)
67.5' (20.5 m)
65' (19.8 m)
62.5' (19 m)
60' (18.3 m)
57.5' (17.5 m)
55' (16.7 m)
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