Ruud PowerVent AP14236 Use And Care Manual page 13

Maximum and Minimum Vent Lengths for Residential
40 & 50 Gallon Power Vents ONLY
Maximum
Altitude for
Models
2" & 3"
Vents
42VP40SF,
42VP40SPF,
5,200'
42VP50SF,
42VP50SPF
42VP40F,
42VP40PF,
7,700'
42VP50F,
42VP50PF
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.
This water heater is supplied with
a two-inch Schedule 40 PVC 45°
vent terminal. When venting
with 3" pipe, a Schedule 40 PVC
45° vent terminal must be used.
Screens for both 2" and 3" vent
terminals have been included.
Minimum vent length for 2"vent pipe is one (1) foot of vertical pipe, one (1)
90°elbow, and three (3) feet of horizontal pipe.
Maximum Venting information for 2" Vents*
Number of Number
90° elbows of 45°
with Vent Elbows
One (1) None
One (1) One (1)
Two (2) None
Two (2) One (1)
Three (3) None
* For the 2" vent, one 90° elbow is approximately equal to 6 feet of vent pipe.
One 45° elbow is approximately equal to 3 feet of vent pipe.
Minimum vent length for 3" vent pipe is one (1) foot of vertical pipe, one (1)
90°elbow, and four (4) feet of horizontal pipe.
Maximum Venting information for 3" Vents**
Number of 90° elbows
with Vent
0-Maximum Altitude:
One (1)
One (1)
Two (2)
Two (2)
Three (3)
Three (3)
Four (4)
Four (4)
Five (5)
** For the 3" vent, one 90° elbow is approximately equal to 5 feet of vent
pipe. One 45° elbow is approximately equal to 2.5 feet of vent pipe.
Maximum Vent Pipe
Length in Feet (ft)
0' - 2,000'
See Maximum Altitude
44
41
38
35
32
Number of Maximum Vent Pipe
45° Elbows
See chart on upper left.
None
One (1)
None
One (1)
None
One (1)
None
One (1)
None
Maximum Vent Pipe
Length in Feet (ft)
2,001' and above.
chart on left.
34
31
28
25
22
Length in Feet (ft)
95
92.5
90
87.5
85
82.5
80
77.5
75
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