Burnham K2WTC - Page 30

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Option 9 10
Illustrated in Figure 7.19 7.20
Pipe Penetration
Through Structure
Vent Roof Roof
Intake Roof Roof
Material
Vent
DuraVent
PolyPro
(Rigid/Flex)
Centrotherm
InnoFlue
SW/Flex
Intake B Vent/PVC B Vent/PVC
Nominal Diameter
Vent 3” 3”
Intake 3” 3”
Min B Vent ID 6” 6”
Min Equivalent Vent Length:
Models
135 36” 36”
150 52” 52”
180 52” 52”
Max Equivalent Vent Length (Note 1):
Models
135 135ft 135ft
150 135ft 135ft
180 135ft 135ft
Vent Manufacturer’s PN for Flex
Termination/Components Required
3PPS-VFT
3PPS-BV*
3PPS-FLEX**
IFBK03****
IAWP03B
* Specify size of B vent (e.g. 3PPS-BV6 is for use with 6” B vent)
** 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.
SeeequivalentlengthsforexventshowninTable7.14andsizingexampleonnextpage.
VII. Venting C. Design Requirements Unique to Vertical Venting Systems (continued)
Table 7.13b: Summary of Vertical “B-Vent Air Chase” Vent Options
(B-Vent Chase MUST Be Sealed)
NOTICE
Vertical venting and combustion air roof penetrations (where applicable) require the use of roof ashing
and storm collar, which are not supplied with the boiler, to prevent moisture from entering the structure.