U.S. Boiler Company K2WT-080B, Installation, Operating And Service Instructions

Page: 37 / 168

37 107672-01- 7/17
VII. Venting
D. Design Requirements Unique to Split Vent Systems (continued)
Table 7.21: Summary of Split Vent System Options (cont.)
Option # 25 26 27 28 29 30
Illustrated in Figure 7.22 7.22 7.22 7.22 7.22 7.22
Pipe Penetration
Through Structure
Vent Roof Roof Roof Roof Roof Roof
Intake Wall Wall Wall Wall Wall Wall
Material
Vent
CPVC/PVC
(Note 2)
CPVC/PVC
(Note 2)
DuraVent
PolyPro
(Ridgid)
DuraVent
PolyPro
(Ridgid)
Selkirk
Polyflue
Selkirk
Polyflue
Intake PVC PVC PVC PVC PVC PVC
Nominal Diameter
Vent 2” 3” 2” 3” 2” 3”
Intake 2” or 3” 3” 2” or 3” 3” 2” or 3” 3”
Min Equivalent Vent Length:
Models
080 48” 48” 48” 48” 48” 48”
100 48” 48” 48” 48” 48” 48”
120
Not Permitted
48”
Not Permitted
48”
Not Permitted
48”
150 52” 52” 52”
180 52” 52” 52”
Max Equivalent Vent Length (Note 1):
Models
080 60ft 135ft 60ft 135ft 60ft 135ft
100 60ft 135ft 60ft 135ft 60ft 135ft
120
Not Permitted
135ft
Not Permitted
135ft
Not Permitted
135ft
150 135ft 135ft 135ft
180 135ft 135ft 135ft
Rigid Vent
Terminals
Vent
Coupling w
Screen
Coupling w
Screen
2PPS-12B or
2PPS-36B w
Screen
3PPS-12B or
3PPS-36B w
Screen
2PF-10UV or
2PF-39UV w
Screen
3PF-10UV or
3PF-39UV w
Screen
Intake 90 Elbow w
Screen
90 Elbow w
Screen
90 Elbow w
Screen
90 Elbow w
Screen
90 Elbow w
Screen
90 Elbow w
Screen
Flex Termination
& Components
(Masonry Chimney
Chase) (Note 3)
Vent
Not Permitted
Intake
Flex Termination
& Components
(B-Vent Chimney
Chase)
Vent
Not Permitted
Intake
* Specify size of B vent (e.g. 2PPS-BV
6
is for use with 6” B vent)
** Specify length in feet.
**** Specify Flex length and B vent diameter (e.g. IFBK02
2505
includes 25ft of flex and used with 5” B vent)
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
.