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VII. Venting
D. Design Requirements Unique to Split Vent Systems (continued)
Table 7.21: Summary of Split Vent System Options (cont.)
Option #
Illustrated in Figure
Vent
Pipe Penetration
Through Structure
Intake
Vent
Material
Intake
Vent
Nominal Diameter
Intake
Min Equivalent Vent Length:
080
100
Models
120
150
180
Max Equivalent Vent Length (Note 1):
080
100
Models
120
150
180
Vent
Rigid Vent
Terminals
Intake
Flex Termination
Vent
& Components
(Masonry
Intake
Chimney Chase)
(Note 3)
Flex Termination
Vent
& Components
(B-Vent Chimney
Chase)
Intake
* Specify size of B vent (e.g. 2PPS-BV
** Specify length in feet.
**** Specify Flex length and B vent diameter (e.g. IFBK02
Note 1: Max vent lengths shown also apply to the intake. Flex vent reduces the maximum allowable vent length in
some cases
See equivalent lengths for flex vent shown in Table 7.14 and sizing example on page 35.
Note 2: First 30" plus first exhaust elbow are CPVC.
Note 3: See Vent Manufacturer's installation manual for gaskets, spacers and other required vent components.
All vertical terminals require compatible roof flashing and storm collars
36
25
26
7.22
7.22
Roof
Roof
Wall
Wall
CPVC/PVC
CPVC/PVC
(Note 2)
(Note 2)
PVC
PVC
2"
3"
2" or 3"
3"
48"
48"
48"
48"
48"
Not
52"
Permitted
52"
60ft
135ft
60ft
135ft
135ft
Not
135ft
Permitted
135ft
Coupling w
Coupling w
Screen
Screen
90 Elbow w
90 Elbow w
Screen
Screen
6
is for use with 6" B vent)
27
28
7.22
7.22
Roof
Roof
Wall
Wall
DuraVent
DuraVent
PolyPro
PolyPro
(Ridgid)
(Ridgid)
PVC
PVC
2"
3"
2" or 3"
3"
48"
48"
48"
48"
48"
Not
52"
Permitted
52"
60ft
135ft
60ft
135ft
135ft
Not
135ft
Permitted
135ft
2PPS-12B or
3PPS-12B or
2PPS-36B w
3PPS-36B w
Screen
Screen
90 Elbow w
90 Elbow w
Screen
Screen
Not Permitted
Not Permitted
2505
includes 25ft of flex and used with 5" B vent)
29
30
7.22
7.22
Roof
Roof
Wall
Wall
Selkirk
Selkirk
Polyflue
Polyflue
PVC
PVC
2"
3"
2" or 3"
3"
48"
48"
48"
48"
48"
Not
52"
Permitted
52"
60ft
135ft
60ft
135ft
135ft
Not
135ft
Permitted
135ft
2PF-10UV or
3PF-10UV or
2PF-39UV w
3PF-39UV w
Screen
Screen
90 Elbow w
90 Elbow w
Screen
Screen
.
107672-03 - 5/18
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