Install Instructions

32
107750-01 - 9/17
VII. Venting C. Design Requirements Unique to Vertical Venting Systems (continued)
Table 7.14: Equivalent Length of Flex Pipe
Equivalent Length (ft)
Flex Vent (1 ft):
3" DuraVent PolyPro Flex 2.0 ft
3" Centrotherm InnoFlue Flex 2.3 ft
3" Selkirk Polyue 2.3 ft
3" DuraVent FasNSeal Flex 1.0 ft
4" DuraVent Poly Pro Flex 2.0 ft
4" Centrotherm InnoFlue Flex 2.3 ft
4" Selkirk Polyue 2.3 ft
B-Vent Air Chase (1ft):
3" Flex Vent in 6" (or larger) B-Vent 1.0 ft
4" Flex Vent in 6" (or larger) B-Vent 1.0 ft
Note: Up to four 45 degree bends may be made in ex pipe or air chase.
These bends are not counted when guring equivalent length.