Burnham K2WTC - Page 39

39
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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 # 17 18
Illustrated in Figure 7.23, 7.24 7.23, 7.24
Pipe Penetration
Through Structure
Vent Roof Roof
Intake Wall Wall
Material
Vent
Centrotherm
Innoue
(Ridgid/Flex)
DuraVent
FasNSeal
(Stainless,
Ridgid/Flex)
Intake PVC PVC
Nominal Diameter
Vent 3” 3”
Intake 3” 3”
Min Equivalent Vent Length:
Models
135 48” 48”
150 52” 52”
180 52” 52”
Max Equivalent Vent Length (Note 1):
Models
135 135ft 135ft
150 135ft 135ft
180 135ft 135ft
Rigid Vent Terminals
Vent
Not Permitted
Intake
Flex Termination
& Components
(Masonry Chimney
Chase)
Vent IFCK03**
2SVSCKIT03**
2SVFLXCN03**
Intake
90 Elbow
w/Screen
90 Elbow
w/Screen
Flex Termination &
Components (B-Vent
Chimney Chase)
Vent IFBK03**** 2SVFLXR03
Intake
90 Elbow
w/Screen
90 Elbow
w/Screen
** Specify length in feet.
**** Specify Flex length and B vent diameter (e.g. IFBK032506 includes 25ft of ex and used with 6” B vent).
Note 1: Max vent lengths shown also apply to the intake. Flex vent reduces the maximum allowable vent length in
some applications. See equivalent lengths for ex vent shown in Table 7.14 and sizing example on page 32.
All vertical terminals require compatible roof ashing and storm collars.