Table of Contents
Advertisement
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)
Option
Illustrated in Figure
Vent
Pipe Penetration
Through Structure
Intake
Vent
Material
Intake
Vent
Nominal Diameter
Intake
Min Equivalent Vent Length:
Models
Max Equivalent Vent Length (Note 1):
Models
Vent Manufacturer's PN for Flex
Termination/Components Required
* Specify size of B vent (e.g. 2PPS-BV6 is for use with 6" B vent)
** Specify length in feet.
**** Specify Flex length and B-vent diameter (e.g. IFBK022505 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.
See equivalent lengths for flex vent shown in Table 7.14 and sizing example on next page.
NOTICE Vertical venting and combustion air roof penetrations (where applicable) require the use of roof
flashing and storm collar, which are not supplied with the boiler, to prevent moisture from entering the
structure.
28
18
7.19
Roof
Roof
DuraVent
PolyPro
(Rigid/Flex)
B Vent/PVC
2"
2" or 3"
Min B Vent ID
5"
080
36"
100
36"
120
150
Not Permitted
180
080
60ft
100
60ft
120
150
Not Permitted
180
2PPS-VFT
2PPS-BV* 2PPS-
FLEX**
19
20
7.19
7.20
Roof
Roof
Roof
Roof
DuraVent
Centrotherm
PolyPro
InnoFlue
(Rigid/Flex)
SW/Flex
B Vent/PVC
B Vent/PVC
3"
2"
3"
2" or 3"
6"
5"
36"
36"
36"
36"
36"
52"
Not Permitted
52"
135ft
60ft
135ft
60ft
135ft
135ft
Not Permitted
135ft
3PPS-VFT
IFBK02****
3PPS-BV*
IAWP02B
3PPS-FLEX**
21
7.20
Roof
Roof
Centrotherm
InnoFlue
SW/Flex
B Vent/PVC
3"
3"
6"
36"
36"
36"
52"
52"
135ft
135ft
135ft
135ft
135ft
IFBK03****
IAWP03B
107672-03 - 5/18
Advertisement
Table of Contents
